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Science 6 Q1

Total questions: 224

Worksheet time: 2hrs 52mins

Name
Class
Date
1.

Which of these mixtures are heterogeneous?

a)

rock and salt

b)

salt and water

c)

mixed nuts

d)

powdered coffee in hot water

2.

Which of the following is an example of a homogeneous mixture?

a)

salt water

b)

air

c)

metal alloys

d)

all of the above

3.
What are the three states of matter?
a)
Solid, gelatin, gas
b)
Ice, gelatin, liquid
c)
Solid, liquid, gas
d)
Ice, ice, baby
4.
What is an example of a solid?
a)
lemonade
b)
ice cubes
c)
chocolate syrup 
d)
mud
5.
What is an example of a liquid? 
a)
lemonade
b)
ice cream
c)
ice cubes
d)
rocks
6.
What is an example of a gas?
a)
Ice cubes
b)
lemonade
c)
mud
d)
oxygen
7.

Which is the solute in a salt solution?

a)
Salt
b)
Water
8.

Which is the solvent in a salt solution?

a)
Salt
b)
Water
9.
A mixture cannot be separated. 
a)
True
b)
False
10.
A solution cannot be separated easily. 
a)
True
b)
False
11.

Which of the following are molecules?

a)
b)
c)
d)
12.

Which of the following are atoms?

a)
b)
c)
d)
13.

What is the mass of the reactants(beginning of the equation. Log and Fire)?

(a)  

14.

What is the mass of the products(end of the equation. Ash and smoke)?

(a)  

15.

The mass of the reactants and mass of the products is ...

(a)  

16.

Which of the following are physical changes?

a)

Dissolving sugar

b)

Change of state (solid, liquid or gas)

c)

Baking/Cooking raw materials

d)

Burning materials

17.

Which of the following are chemical changes?

a)

Dissolving sugar

b)

Change of state (solid, liquid or gas)

c)

Baking/Cooking raw materials

d)

Burning materials

18.

True or False: If the structure changes/the atoms rearrange, then a chemical change has occurred.

a)

True

b)

False

19.

True or false: As temperature increases, evaporation decreases.

a)

True

b)

False

20.

This metal was white. It sat out in the rain for several weeks and now has turned flakey and red-ish orange. What type of change has happened?

(a)  

21.

This causes evaporation.

a)

Sun

b)

Run-off

c)

Gravity

d)

Water's mass

22.

This causes water to flow downhill and down stream.

a)

Sun

b)

Run-off

c)

Gravity

d)

Friction

23.

Ana noticed that there are pieces of hulls mixed in white rice. How can she remove these hulls?

a)

by boiling

b)

by filtering

c)

by winnowing

d)

by scooping

24.

Which of the following mixtures can be best separated using a magnet?

a)

water and sand

b)

sugar and salt

c)

oil and water

d)

sand and iron nails

25.

The two types of mixtures are _______________ and _________________.

(a)  

26.

In filtering technique of separating mixtures, what type of material passes through a filter paper or cloth?

a)

Liquid

b)

Gas

c)

Solid

d)

Plasma

27.

What appropriate technique of separating mixtures will be best used in separating stones from water?

a)

Sieving

b)

Filtering

28.

Which is NOT a colloid?

a)

Butter

b)

Mayonnaise

c)

Milk

d)

Vinegar

29.

Which of the following is NOT a homogeneous mixture?

a)

Juice drink

b)

Hot coffee

c)

Fruit salad

d)

Hot tea

30.

Suspension is a kind of mixture where particles are evenly distributed and invisible.

a)

Yes

b)

No

31.

salt and water

a)

Homogeneous

b)

Heterogeneous

32.

gravel and sand

a)

Homogeneous

b)

Heterogeneous

33.

brown sugar and coffee

a)

Homogeneous

b)

Heterogeneous

34.

________ is a mixture of two or more chemical substances where the various components can be visually distinguished.

a)

Homogeneous

b)

Heterogeneous

35.

________ is a type of mixture in which the composition is uniform and every part of the solution has the same properties.

a)

Homogeneous

b)

Heterogeneous

36.

oil and water

a)

Miscible

b)

Immiscible

37.

food coloring and water

a)

Miscible

b)

Immiscible

38.

Which are examples of heterogeneous mixture?

a)
b)
c)
d)
39.

Which are examples of homogeneous mixture?

a)
b)
c)
d)
40.

Which are examples of mixture?

a)
b)
c)
d)
41.

Which of the following is a heterogeneous mixture? (Tick all possible answers.)

a)

coffee

b)

noodle soup

c)

orange juice

d)

sugar solution

42.

Which of the following liquids do not mix with water?

 

    

a)

liquid soap

b)

oil

c)

soy sauce  

d)

vinegar

43.

Colloids are ___________________.

a)

homogeneous mixtures that seem to be heterogeneous

b)

heterogeneous mixtures that seem to be homogeneous

c)

suspensions that look like solutions

d)

solutions that look like colloids

44.

Cloud and fog are what kind of colloid?

       

a)

liquid dispersed in solid

b)

gas dispersed in liquid

c)

gas dispersed in solid

d)

liquid dispersed in gas

45.

Which of the following colloids is an example of a sol?

 

a)

whipped cream

b)

milk   

c)

hair spray

d)

paint

46.

In which glass of liquid is sugar difficult to dissolve?

a)

in a glass of ice tea

b)

in a glass of hot water

c)

in a glass of tap water

d)

in a glass of cold water with ice cubes

47.

A flour mixed with cornstarch is a homogeneous mixture because:

a)

you can easily identify its components

b)

the mixture appears one or uniform

c)

you can only see the texture

d)

the mixtures did not mix well

48.

What kind of mixture is formed when larger particles settle out when left

undisturbed?

a)

colloid

b)

suspension

c)

solution

d)

solvent

49.

Which of the following mixtures is not an example of a suspension? (Tick all possible answers.)

a)

salt and water

b)

oil and water

c)

sand and water 

d)

chalk and water

50.

Suspensions are homogeneous mixtures.

a)

TRUE

b)

FALSE

51.

If there is a large amount of dissolved solute than solvent then it is

    concentrated solution.

a)

TRUE

b)

FALSE

52.

A solution might exist in liquid, solid, or gas depending on the state of solvent.

a)

TRUE

b)

FALSE

53.

In a colloid, the component typically present in a relatively small amount is

    called dispersed phase/ substance .

a)

TRUE

b)

FALSE

54.

A mixture of oil and water is a solution.

a)

TRUE

b)

FALSE

55.

 Colloids are used as food such as gelatin .

a)

TRUE

b)

FALSE

56.

Solution is a homogeneous mixture while colloid is heterogeneous mixture.

a)

TRUE

b)

FALSE

57.

Tyndall effect is the scattering of visible light by colloidal particles.

a)

TRUE

b)

FALSE

58.

Colloid is a type of mixture in which solid or liquid particles are dispersed

uniformly throughout a gas, liquid or solid.

a)

TRUE

b)

FALSE

59.

Sol is formed when gas particles are trapped in a liquid or solid.

a)

TRUE

b)

FALSE

60.

Which of the following is not soluble in water?

a)

moth balls

b)

salt

c)

sugar

d)

vinegar

61.

Salt and water is which type of mixture?

a)

Solution

b)

Sol

c)

Suspension

d)

Aerosol

62.

Milk is which type of mixture?

a)

Solution

b)

Emulsion

c)

Suspension

d)

Sol

63.

Sand and water is which type of mixture?

a)

Solution

b)

Colloid

c)

Suspension

d)

Emulsion

64.

Ice cream is which type of mixture?

a)

Solution

b)

Colloid

c)

Suspension

d)

Aerosol

65.

Toothpaste is which type of mixture?

a)

Solution

b)

Colloid

c)

Suspension

d)

Foam

66.

Calamansi juice is which type of mixture?

a)

Solution

b)

Colloid

c)

Suspension

d)

Sol

67.

Hair gel is which type of mixture?

a)

Solution

b)

Colloid

c)

Suspension

d)

Aerosol

68.

Muddy water is which type of mixture?

a)

Solution

b)

Colloid

c)

Suspension

d)

Sol

69.

SMOG is which type of mixture?

a)

Solution

b)

Colloid

c)

Suspension

d)

Emulsion

70.

Identify the type of colloid shown in the illustration.

         

a)

Sol

b)

Emulsion

c)

Aerosol

d)

Foam

71.

Identify the type of colloid shown in the illustration.

         

a)

Sol

b)

Emulsion

c)

Aerosol

d)

Foam

72.

Identify the type of colloid shown in the illustration.

         

a)

Sol

b)

Emulsion

c)

Aerosol

d)

Foam

73.

Identify the type of colloid shown in the illustration.

         

a)

Sol

b)

Emulsion

c)

Aerosol

d)

Foam

74.

Identify the type of colloid shown in the illustration.

a)

Sol

b)

Emulsion

c)

Aerosol

d)

Foam

75.

What are the three types of mixture? ( Click all your answers)

a)

Solution

b)

Colloid

c)

Suspension

d)

Solute

e)

Evaporation

76.

A suspension consists of two or more substances that will mix together, but do not dissolve into each other to form new particles or compounds.

a)

True

b)

False

77.

Suspensions are insoluble mixture.

a)

True

b)

False

78.

Solution, Colloid and Suspension differ in their solubility.

a)

True

b)

False

79.

What are the two main parts of a colloid? ( Click all possible answers)

a)

Solute

b)

Dispersed phase/ substance

c)

Dispersion medium

d)

Solvent

e)

Sediments

80.

Which of the following mixtures can be separated using decantation method?

a)

sugar and milk

b)

water in oil

c)

mixed nuts

d)

vegetable salad with dressing

81.

Your mother asked you to cook dried fish for lunch and you accidentally mixed the oil with water. What method will you use to separate the mixture?

a)

decantation method

b)

magnetism

c)

evaporation

d)

filtering

82.

Which one of the following techniques would best be used to separate soil and water?

a)

filtration

b)

distillation

c)

decanting

d)

chromatography

83.

This method is a technique used in separating a less-dense substance from a denser one.

a)

evaporation

b)

decantation

c)

picking

d)

all of the above

84.

What will happen to the less-dense substance of mixtures if you separate them using decantation method?

a)

it will evaporate

b)

it will float up

c)

remain the same

d)

it will become solid

85.

In the process of decantation, the mixtures is left _______________?

a)

behind

b)

undisturbed

c)

removed

d)

none of the above

86.

How can decantation method be useful to everyday life?

a)

it help us to become more productive

b)

it gives us satisfaction to our everyday living

c)

it just an ordinary technique

d)

it helps us to make our everyday living more efficient and easier

87.

Is decantation method applicable to all types of mixtures

a)

yes

b)

no

c)

maybe

d)

sometimes

88.

Which of these examples show evaporation process as technique of separating mixtures?

a)

drying of water on the table

b)

flooding of water in the river

c)

cooling of water in the refrigerator

d)

freezing of water in the ocean

89.

In evaporation process, liquid becomes _______________ when heated.

a)

solid

b)

ice cubes

c)

plasma

d)

vapor

90.

How will you separate mixture of staple wire and chalk powder?

a)

by decantation

b)

by winnowing

c)

by using a magnet

d)

by evaporation

91.

Mrs. Cruz’s needles were mixed with bits of paper. How will she separate the needles safely from the bits of paper?

a)

by decantation

b)

by winnowing

c)

by using a magnet

d)

by evaporation

92.

How will you separate paper clips and thumbtacks from flour?

a)

by using magnet

b)

by using a sieve

c)

by using a filter paper

d)

by using filter paper

93.

Which of the following best describes a magnet when used to separate mixtures

a)

It can separate metals from nonmetals.

b)

It can separate nonmetals objects.

c)

It can separate larger particles.

d)

It can separate smaller particles.

94.

__________ when mixed with non-metals, could be separated by magnet.

a)

rubber

b)

plastic

c)

water

d)

metals

95.

Metals which are made up of ______________ are easily attracted to the magnet.

a)

alloy, nickel or cobalt

b)

paint, water or powder

c)

salt, rubber or plastic

d)

gold, ruby, diamond

96.

There is no ______________________ involved in the separation of components in magnetism.

a)

physical reaction

b)

mechanical reaction

c)

chemical reaction

d)

acid reaction

97.

Which is true about heterogeneous mixtures?

A. Composition of mixtures are the same all throughout.

B. Composition of mixtures are visible

C. Composition of mixtures can be easily identified

a)

A only

b)

B only

c)

C only

d)

Both B and C

e)

Both A and C

98.

Your mother prepared pinakbet for lunch. How will you describe its ingredients?

a)

It is a homogeneous mixture because it was evenly mixed.

b)

It is a heterogeneous mixture because its components are visible.

c)

It is a heterogeneous mixture because of its uniformity.

d)

It is a homogeneous mixture because it is not uniform.

99.

A vinegar mixed with soy sauce is a homogeneous mixture because:

a)

you can easily identify its components

b)

you can only see the dark color of soy sauce

c)

the mixture appears one or uniform

d)

the mixtures did not mix well

100.

If you are going to mix hot water and coffee powder what will happen?

a)

The coffee powder will not dissolve in water.

b)

The coffee powder will dissolve in water thoroughly.

c)

The coffee powder will dissolve in water partially.

d)

None of the above

101.

Mixtures can be homogenous or heterogeneous. A sachet of 3 in 1 coffee contains coffee, sugar and powdered cream. Thus, making it heterogeneous. When hot water is being poured into the 3 in 1 mixture, it turned homogeneous. What idea supports the said occurrence?

a)

The components of mixtures when dissolve in hot water cannot be identified.

b)

The components of mixtures mixed with hot water taste sweet.

c)

The components of mixtures form a two-layer liquid.

d)

The components of mixtures can be separated.

102.
The air around was is  a mixture of gases.
a)
True
b)
False
103.
What type of mixture is this?
a)
heterogeneous 
b)
homogeneous
104.
What is a mixture?
a)
elements chemically combined
b)
a combination of different things
c)
it is found on the Periodic Table 
d)
it is made of chemical
105.
Sand floating in water, but most of the sand is settled at the bottom this an example of which type of mixture?
a)
A solution
b)
A colloid
c)
A suspension
d)
A compound
106.

Sand floating in water, but most of the sand is settled at the bottom this an example of which type of mixture?

(a)  

107.
Fog is an example of a ____. 
a)
colloid
b)
compound 
c)
solution
d)
substance
108.
____ is another name for a homogeneous mixture. 
a)
Solution
b)
Suspension
c)
Substance
d)
Liquid 
109.
The scattering of light by colloids is called ____. 
a)
homogeneous
b)
suspension
c)
air pollution
d)
The Tyndall effect
110.

Which statement below does NOT describe a colloid?

a)

A colloid is a type of heterogeneous mixture

b)

A colloid is a type of solution.

c)

The particles in a colloid do not settle like they do in a suspension.

d)

The particles in a colloid do not dissolve – they are just too small to be seen.

111.

How are suspensions and colloids different?

a)

Suspensions settle out and colloids do not settle.

b)

Colloids settle out and suspensions do not settle.

c)

Suspensions dissolve and colloids do not.

d)

Colloids dissolve and suspensions do not.

112.

A mixture consisting of tiny particles that are intermediate in size between those in solutions and those in suspensions and that are suspended in a liquid, solid, or gas.

a)

Colloid

b)

Solvent

c)

Solute

d)

Solution

113.

In a solution the substance which the solute dissolves onto.

a)

solvent

b)

suspension

c)

colloid

d)

solution

114.

In a solution the substance which the solute dissolves onto.

(a)  

115.

In a solution the substance that dissolves in the solvent.

a)

Solute

b)

Suspension

c)

Colloid

d)

Solvent

116.

In a solution the substance that dissolves in the solvent.

(a)  

117.

The particles in both a solution and a colloid can

a)

scatter light.

b)

settle out.

c)

pass through a fine filter.

118.

The method of separating a solid from a liquid by turning the liquid into a gas.

a)

Evaporation

b)

Filtration

c)

Centrifugation

d)

Chromatography

119.

The method uses to separate a solid from a liquid or a gas by passing them through a device that is too small to let the solid particles through.

a)

Evaporation

b)

Distillation

c)

Filtration

d)

Centrifugation

120.

Separating salt from ocean water to obtain drinking water would best be accomplished through which process?

a)

Evaporation

b)

Centrifugation

c)

Chromatography

d)

Distillation

121.

Which separation technique would be most effective to see what different pigments make up a black marker?

a)

Centrifugation

b)

Distillation

c)

Chromatography

d)

Magnetism

122.

To separate a mixture of salt and water what separation method is best to be used?

a)

filtration

b)

distillation

c)

chromatography

d)

evaporation

123.
Two or more substances mingled together, but not chemically combined are known as a
a)
residue
b)
solution
c)
distillate
d)
mixture
124.
The separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known as
a)
decanting
b)
 evaporation
c)
loading
d)
chromatography
125.
Which one of the following would you use to separate sand from iron filings?
a)
a bar magnet
b)
filter paper
c)
chromatography paper
d)
alum
126.
To separate a mixture of soil and water what separation method is used?
a)

filtration

b)

distillation

c)

chromatography

d)

evaporation

127.

Name the separation technique shown in the diagram.

a)

evaporation

b)

distillation

c)

filtration

d)

decantation

128.

Liquids that do not mix may be separated by using..

a)

an evaporating dish

b)

a separating funnel

c)

a loading

d)

a sedimentation

129.

This method is used to separate metals from non metals.

a)

use of magnet

b)

physical manipulation

c)

sieving

d)

chromatography

130.

This method is utilized in industries like junkyards to remove metal scraps from other non-metal materials.

a)

chromatography

b)

physical manipulation

c)

use of magnet

d)

distillation

131.

If I have a mixture of wooden blocks and metal blocks. What is a fast way to separate them?

a)

relative density (put them in water)

b)

filter

c)

sieve

d)

handpicking

132.

What mixture could you use this tool to best separate that mixture?

a)

sugar and salt

b)

sand and rocks

c)

apples and grapes

d)

oil and water

133.
Type of mixture that DOESN'T HAVE the same composition in every part.
a)
Homogeneous
b)
Heterogeneous
134.
Type of mixture that has the SAME COMPOSITION in every part.
a)
Homogenous
b)
Heterogeneous
135.

What kind of mixture is a combination of substances that has uniform composition and appearance?

a)

colloid

b)

heteregenous

c)

homogeneous

d)

suspension

136.

Which statement describes a heterogeneous mixture?

a)

A chemical reaction takes place.

b)

It has a uniform composition and appearance.

c)

It does not have a uniform composition and appearance.

d)

No answer

137.

What do you call a way of separating mixture in which the components should be big enough to be picked by hands?

a)

Filtration

b)

Handpicking

c)

Sieving

d)

Use of Magnet

138.

Which process is BEST in purifying water?

a)

decantation

b)

distillation

c)

filtration

d)

evaporation

139.

Immiscible liquids like oil and water can be separated by pouring or scooping out the topmost liquid. This process is called _______.

a)

distillation

b)

evaporation

c)

filtration

d)

decantation

140.

Which mixtures CANNOT be separated through picking?

a)

grains and mongo seeds

b)

sliced fruits

c)

oil and vinegar

d)

nails and pins

141.

This process involves separating solid particles from a liquid substance using a piece of cloth.

a)

decantation

b)

filtration

c)

evaporation

d)

using a magnet

142.

To separate rocks into different sized particles for road building and other construction projects, which method is applicable?

a)

sieving

b)

winnowing

c)

picking

d)

threshing

143.

What is winnowing?

a)

It is the process of freeing (grain) from the lighter particles of chaff, dirt, etc.

b)

Is used to separate smaller solid particles from larger solid particles.

c)

Picking of small particles to larger

d)

Both B and C

144.

What is the process by which water changes from a liquid to gas or vapor?

a)

filtration

b)

evaporation

c)

mixture

d)

decantation

145.

Kidneys clean our blood through which process?

a)

distillation

b)

evaporation

c)

decantation

d)

filtration

146.

What is the appropriate method to use to separate needles in a box of beads?

a)

sieving

b)

decantation

c)

using magnet

d)

threshing

147.

What is the appropriate method to obtain freshly squeezed coconut milk?

a)

evaporation

b)

filtration

c)

decantation

d)

distillation

148.

What is the appropriate method to separate rice and water?

a)

evaporation

b)

filtration

c)

decantation

d)

distillation

149.

What do you call the process of separating insoluble solid from liquid?

a)

decantation

b)

filtering

c)

sieving

d)

evaporation

150.

What do you call the process of separating insoluble solid from liquid?

(a)  

151.

What do you call the process of separating liquids from solids by slowly and carefully pouring the liquid from the container?

a)

decantation

b)

filtering

c)

sieving

d)

evaporation

152.

What do you call the process of separating liquids from solids by slowly and carefully pouring the liquid from the container?

(a)  

153.

What do you call the process of separating two different-sized solids from each other? This process is responsible in retaining the larger particles.

a)

decantation

b)

filtering

c)

sieving

d)

evaporation

154.

What do you call the process of separating two different-sized solids from each other? This process is responsible in retaining the larger particles.

(a)  

155.

What do you call the process of separating components of a mixture with a dissolved solid in a liquid? The liquid is separated, meaning it is convert from its liquid state to gaseous state. This often requires heat. Once the liquid is completely separated, the solid is all that is left behind.

a)

decantation

b)

filtering

c)

sieving

d)

evaporation

156.

What do you call the process of separating components of a mixture with a dissolved solid in a liquid? The liquid is separated, meaning it is convert from its liquid state to gaseous state. This often requires heat. Once the liquid is completely separated, the solid is all that is left behind.

(a)  

157.

What are the four types of a colloid mixture?

(Enumerate them alphabetically.)

(a)  

158.

What are the 3 types of mixtures?

(Enumerate them alphabetically.)

(a)  

159.

What do you call a mixture that appears to be uniform throughout and as one phase only?

(a)  

160.

What do you call a mixture with visible components that are not equally distributed throughout?

(a)  

161.

What do you call a form of matter that cannot be separated through physical or ordinary chemical means, and has a fixed composition or properties?

(a)  

162.

What do you call the simplest type of substance?

(a)  

163.

What do you call the substance that are formed when two or more elements are chemically combined?

(a)  

164.

What is the "smallest unit of an element to retain all the chemical properties of that element"?

(a)  

165.

These are substances which are formed by two or more elements that are united chemically in fixed proportions.

(a)  

166.

What do you call a type of homogenous mixture where particles of the dissolved substance are spread throughout the mixture?

(a)  

167.

What do you call the ability of a substance to dissolve in a solvent?

(a)  

168.

Which of the following does not describe a mixture?

a)

There is no chemical reaction.

b)

The amount of its components are fixed.

c)

The components retain some of their properties.

d)

The mixture can be separated into its components.

169.

Which property refers to the ability of a substance to dissolve in a solvent?

a)

solubility

b)

emulsifier

c)

insoluble

d)

soluble

170.

Which of the following statements is true about heterogeneous mixture?

a)

Its components are identifiable.

b)

It can either be a colloid or a solution.

c)

Its components are evenly distributed.

d)

One of its components dissolves in other mixture component.

171.

Which is not an example of a colloid?

a)

bronze

b)

marshmallow

c)

mud

d)

smoke

172.

​ aluminum foil​

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
173.

air

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
174.

soda

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
175.

brass

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
176.

bronze

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
177.

mayonnaise

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
178.

mineral water

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
179.

paint

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
180.

salad dressing

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
181.

soil

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
182.

vegetable oil

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
183.

salt, sand and water

a)
Pure Substance
b)
Homogeneous
c)
Heterogeneous
184.

Yes or No: Would salt and water still be considered a solution if the quantity of salt is more than the quantity of water?

(a)  

185.

What is the term used to describe if solute is more than the solvent?

(a)  

186.

What do you call the insoluble solids collected after filtration?

(a)  

187.

What do you call the component that passes through the filter paper in a filtration process?

(a)  

188.

What do you call the liquid that is condensed from vapor in distillation?

(a)  

189.

What do you call the method of separating mixtures using both evaporation and condensation?

(a)  

190.

What do you call the method of separating mixtures that requires heating to evaporate the liquid component and leaving the solid component behind?

(a)  

191.

What is the other name for sieving?

(a)  

192.

This is a method of separating mixtures by allowing the other component to settle at the bottom of the container.

(a)  

193.

What do you call the solid component in the mixture that settles at bottom of a container?

(a)  

194.

What is the most appropriate method of separation for:

clear water and insoluble solids

a)

evaporation

b)

filtration

c)

sieving

d)

decantation

195.

What is the most appropriate method of separation for:

paper clips and plastic buttons

a)

handpicking

b)

magnetic separation

c)

sieving

d)

distillation

196.

What is the most appropriate method of separation for:

paper clips and plastic buttons

a)

handpicking

b)

evaporation

c)

sieving

d)

distillation

197.

What is the most appropriate method of separation for:

gummy bears of different colors

a)

handpicking

b)

magnetic separation

c)

sieving

d)

decantation

198.

What is the most appropriate method of separation for:

rice grains and flour

a)

handpicking

b)

filtration

c)

sieving

d)

magnet separation

199.

What is the most appropriate method of separation for:

iron filings and sand

a)

handpicking

b)

filtration

c)

sifting

d)

magnet separation

200.

What is the most appropriate method of separation for:

water and pasta

a)

handpicking

b)

filtration

c)

sifting

d)

magnet separation

201.

What should be mixed with copper to make a bronze?

a)

carbon

b)

silicon

c)

tin

d)

zinc

202.

What is concrete composed of?

a. water and cement

b. fine and coarse aggregates

a)

a only

b)

b only

c)

both a and b

d)

none of the choices

203.

Why was Pasig River declared biologically dead in the 1990s?

a)

Water lilies thrived in it.

b)

Environmental groups kept it clean.

c)

Dead bodies were seen floating on it.

d)

It was heavily polluted that no organism can live in it.

204.

Which will likely cause soil pollution in areas that are near a mining field?

a)

algal blossoms

b)

eutrophication

c)

greenhouse effect

d)

mine tailings

205.

What is the most common filter paper used at homes?

(a)  

206.

It is formed from the remains of plants and animals millions of years ago.

(a)  

207.

What do you call the process of extraction of crude oil from the ground?

(a)  

208.

Metals mixed with other metals is called (a)   .

209.

Who is this Dutch engineer and inventor who founded the nonprofit foundation The Ocean Cleanup, that focuses on building machines and tools as well as establishing systems that would be efficient in extracting plastic or waste in rivers and oceans?

(a)  

210.

Which element has been introduced to be mixed in gasoline to reduce engine knock but found out that the mixture has a high level of toxicity?

(a)  

211.

What type of solution is air in scuba tank?

a)

gaseous solution

b)

liquid solution

c)

solid solution

d)

saturated solution

212.

What type of mixture is air in scuba tank?

a)

solution

b)

colloid

c)

suspension

d)

aerosol

213.

What type of mixture is the water in a swimming pool?

a)

pure substance

b)

solution

c)

suspension

d)

colloid

214.

What type of mixture are gelatin?

a)

pure substance

b)

solution

c)

suspension

d)

colloid

215.

What type of mixture is cheese?

a)

pure substance

b)

solution

c)

suspension

d)

colloid

216.

What type of mixture is butter?

a)

pure substance

b)

solution

c)

suspension

d)

colloid

217.

What type of mixture are clouds?

a)

pure substance

b)

solution

c)

suspension

d)

colloid

218.

What type of mixture is whipped cream?

a)

pure substance

b)

solution

c)

suspension

d)

colloid

219.

What type of colloid is gelatin?

a)

aerosol

b)

sol

c)

emulsion

d)

foam

220.

What type of colloid is cheese?

a)

aerosol

b)

sol

c)

emulsion

d)

foam

221.

What type of colloid is butter?

a)

aerosol

b)

sol

c)

emulsion

d)

foam

222.

What type of colloid are clouds?

a)

aerosol

b)

sol

c)

emulsion

d)

foam

223.

What type of colloid is whipped cream?

a)

aerosol

b)

sol

c)

emulsion

d)

foam

224.

Who is this Scottish botanist, credited for the discovery of Brownian motion, where particles of pollen moving in random while floating in water?

(a)  

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