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S2 Forensics Part 1

Total questions: 72

Worksheet time: 55mins

Name
Class
Date
1.

MEMORIZE THIS IMAGE...

a)

READY!

b)

LET'S GO!

2.

What is the colour of this flower?

a)

yellow

b)

blue

c)

green

d)

red

3.

MEMORIZE THIS IMAGE...

a)

READY!

b)

LET'S GO!

4.

What is the color of a car in this image?

a)

Black

b)

White

c)

Blue

d)

Red

5.

MEMORIZE THIS IMAGE...

a)

READY!

b)

LET'S GO!

6.

What colour was the knife handle?

a)

Brown

b)

Silver

c)

Gold

d)

Black

7.

MEMORIZE THIS IMAGE...

a)

READY!

b)

LET'S GO!

8.

What color are the flowers that grow on the lawn?

a)

White

b)

No flowers

c)

Yellow

d)

Red

9.

MEMORIZE THIS IMAGE...

a)

READY!

b)

LET'S GO!

10.

What color is the traffic light?

a)

Black

b)

Green

c)

Yellow

d)

Red

11.
What is essential for a combustion reaction to begin?
a)
Carbon dioxide
b)
Fuel 
c)
Fuel, oxygen and heat
d)
Water and oxygen
12.
Ice melting
a)
Chemical Change
b)
Physical Change
13.
What happens in ALL chemical changes?
a)
Change in state of matter
b)
A new substance is formed
c)
Bubbles are produced
d)
An explosion
14.

In reactions, products must be equal to..

a)

Products

b)

Reactants

c)

Starters

d)

Enders

15.
Which of the following describes a precipitate?
a)
a liquid forms when a block of metal is heated
b)
a solid forms when one liquid is poured into another
c)
a gas forms when a solid is placed in a liquid
d)
bubbles form when an acid is poured on a rock
16.

This change is a

a)

chemical reaction

b)

physical change

c)

musical change

d)

all answers are correct

17.

The reactants in the image above are:

a)

CH4 and 2 O2

b)

2 H2O and CO2

c)

All of these are reactants

d)

All of these are products

18.

The products in the image above are:

a)

CH4 and 2 O2

b)

2 H2O and CO2

c)

All of these are reactants

d)

All of these are products

19.

We know that there was a chemical reaction occurring when 2 clear liquids were mixed together. That is because we show the production of a _____________.

a)

solid.

b)

precipitate.

c)

gas.

20.

When zinc reacted with hydrochloric acid, what was the result of this reaction?

a)

a white powder

b)

a blue liquid

c)

a brown precipitate

d)

a gas

21.

The result of the experiment between Iodine and Aluminum was the production of __________________.

a)

clear liquid.

b)

a white powder.

c)

yellow precipitate.

d)

bubbles.

22.

A precipitate is a ___________ that forms when 2 liquids react together.

a)

solid

b)

liquid

c)

gas

d)

plasma

23.

How is a chemical change different from a physical change?

a)

there is no difference

b)

a physical change creates a new substance

c)

a chemical change creates a new substance

24.
The left side of the equation below is called
a)
Products
b)
Reactants
25.
The right side of the equation below is called the
a)
products
b)
reactants
26.
Which statement is not a description of a chemical reaction?
a)
A solid is dropped into a beaker of liquid and a gas is released.
b)
Two liquids are mixed in a beaker and a solid forms at the bottom of the beaker.
c)
A solid is dropped into a beaker of liquid and an explosion occurs.
d)
A liquid is heated in the sun and half of it evaporates.
27.

How many Hydrogens are on the product side of this chemical equation?

a)

1

b)

2

c)

3

d)

4

28.
If reaction starts with 20g of reactants it should produce... 
a)
a total of 40g of product
b)
a total of 10g of product
c)
a total of 80 g of product
d)
a total of 20g of product
29.

Complete the word equation for a chemical reaction.

reactants →\rightarrow  .........................

a)

reaction

b)

chemicals

c)

catalyst

d)

products

30.

Name the three states of matter

a)

solid

liquid

fog

b)

ice

water

steam

c)

solid

liquid

gas

d)

reactants

products

mass

31.
Which of the following is a chemical change?
a)
water freezes to form ice
b)
sugar dissolves in water
c)
gasoline burns in a car engine
d)
a piece of metal expands when it is heated
32.
Contains only one kind of atom.
a)
Element
b)
Compund
c)
Mixture
33.
Contains two or more atoms combined
a)
Elements
b)
Compounds
c)
Mixtures
34.
The air is a _________. 
a)
element 
b)
mixture 
c)
compound 
d)
energy 
35.
Elements can be broken down into simpler substances. 
a)
false 
b)
true 
c)
sometimes 
36.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
37.
Shiny
a)
Metal
b)
Nonmetal
38.
What is salad?
a)
element
b)
compound
c)
mixture
39.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
40.

Elements consist of only one type of what?

a)

compound

b)

atom

c)

mixture

d)

symbol

41.

The symbol for carbon is?

a)

Cu

b)

Cr

c)

C

d)

Ca

42.

When two or more different elements join together with a chemical bond, they are called ....

a)

atoms

b)

mixtures

c)

elements

d)

compounds

43.

When different elements or compounds are combined but aren't joined with a chemical bond, they are called....

a)

mixtures

b)

products

c)

molecules

d)

atoms

44.

The elements sodium and chlorine react together to produce what compound?

a)

Sodium chlorine

b)

chloride sodium

c)

sodium chloride

d)

chlorine sodium

45.

The compound copper sulfate (CuSO4) contains how many of each element?

a)

Cu = 0 S = 0 O = 4

b)

Cu = 1 S = 1 O = 1

c)

Cu = 4 S = 4 O = 4

d)

Cu = 1 S = 1 O = 4

46.

calcium carbonate (CaCO3) contains which elements?

a)

Calcium

b)

carbon

c)

oxygen

d)

all of the above

47.

Distillation can used to separate out a mixture of a liquid and a dissolved solid (solution), for example getting pure water from sea water. It involves....

a)

evaporation followed by condensation

b)

condensation followed by evaporation

c)

chromatography

d)

filtration followed by condensation

48.

Filtration is used to separate....

a)

a solution from a solute

b)

a solute from a solution

c)

a soluble solid from a solution

d)

an insoluble solid from a solution

49.

Which statement is true?

a)

Compounds are easily separated back into elements

b)

Some mixture can be easily seperated

50.

Magnesium + ________ --> magnesium oxide


What is missing?

a)

Hydrogen

b)

Sulphur

c)

Oxygen

d)

Oxide

51.

Identify the product(s) in this word equation

a)

Sodium

b)

Sodium chloride

c)

Sodium and Chlorine

d)

Sodium and sodium chloride

52.

What are the reactants in this word equation?

a)

Carbon dioxide and oxygen

b)

Carbon dioxide and water

c)

Oxygen and glucose

d)

Oxygen and water

53.

In this chemical reaction zinc is a...

a)

Product

b)

Reactant

c)

Neither

54.

Magneisum reacts with oxygen to form magnesium oxide. The correct word equation is...

a)

A

b)

B

c)

C

d)

D

55.

Identify the non-metal element in zinc chloride

a)

Zinc

b)

Chlorine

c)

Zinc chlorine

d)

zinc chloride

56.

Identify the metal element in zinc chloride

a)

Zinc

b)

Chlorine

c)

Zinc chlorine

d)

zinc chloride

57.

Identify the product when zinc and chlorine react together

a)

Zinc

b)

Chlorine

c)

Zinc chlorine

d)

zinc chloride

58.

Which symbol shows a chemical reaction has occured?

a)

A

b)

B

c)

C

d)

D

59.
What does this word equation represent: Iron + oxygen → Iron oxide
a)
A physical change in iron (nothing new gets made)
b)
A chemical reactino between iron and oxygen, where rust (iron oxide) is produced
c)
A chemical reaction between iron and rust, where oxygen is produced
d)
A physical change between iron and oxygen that forms a red color
60.

Iron reacts with sulfur to produce iron(II) sulfide. Choose the correct word equation.

a)

iron + solid → iron(II) sulfide

b)

iron + sulfur → iron(II) sulfide

c)

iron(II) sulfide + iron→ sulfur

d)

sulfur + iron(II) sulfide → iron

61.

Sodium + chlorine

a)

sodium chloride

b)

sodium hydroxide

c)

sodium oxide

d)

sodium

62.

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

a)

Filtration

b)

Distillation

c)

Chromatography

d)

Evaporation to dryness

63.

How would you separate the substances shown in the picture (oil and water)?

a)

by sieving

b)

by decanting

c)

by distillation

d)

by filtering

64.
Which one of the following is the name for separation technique in the picture below
a)
distillation
b)
dissolving
c)
evaporation
d)
decanting
65.
Name the separation method that causes wet clothes on a clothes line to dry
a)
Chromatography
b)
Filtration
c)
Distillation
d)
Evaporation
66.
In the distillation apparatus shown, what are the parts labelled A and B?
a)
A = funnel, B = thermometer
b)
A = thermometer, B = funnel
c)
A = condenser, B = flask
d)
A = condenser, B = thermometer
67.

Dyes in a felt-tip pen may be separated by....

a)

Distillation

b)

Decanting

c)

Chromatography

d)

Centrifuge

68.
The diagram shows the apparatus for separating soil and water. What are the labelled parts?
a)
A = distillate, B = filtrate
b)
A = filtrate, B = residue
c)
A = residue, B = filtrate
d)
A = residue, B = distillate
69.

No matter what you do, sand will not dissolve in water, because sand is _________.

a)

dissolved

b)

soluble

c)

insoluble

d)

aqueous

70.

What is the name of this separation technique?

a)

distillation

b)

filtration

c)

evaporation

d)

chromatography

71.

Charcoal powder is insoluble in water. When water is filtered, the charcoal powder becomes the _______.

a)

solute

b)

residue

c)

filtrate

d)

solvent

72.

This process allows the fine flour particles to pass through the holes of the strainer while the bigger impurities remain on the strainer. What is this process called?

(a)  

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