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Worksheets

Combined Science MidTerm

Total questions: 186

Worksheet time: 6hrs 41mins

Name
Class
Date
1.

Which characteristic means getting rid of all poisonous waste ?

a)

Respiration

b)

Excretion

c)

Removal

d)

Homeostasis

2.
Which of these is NOT a way to know if something is living?
a)
it grows
b)
it reproduces
c)
it moves
d)
it takes in nutrients
3.
What do living things use energy for?
a)
To do things like grow, repair, replace cells, and digest.
b)
To find friends
c)
To succeed in school
d)
To reach their goal
4.
Diffusion is the movement of molecules from an area of _____ concentration to an ______ concentration
a)
High, low
b)
Low, high
c)
Low, low,
d)
High, high
5.
Where is there a low concentration of dye?
a)
at the bottom of cup
b)
in the color
c)
at the top of cup 
d)
no concenteraion gradient
6.
Permeable means
a)
things can pass through
b)
the concentration levels are different
c)
it is permanent
d)
things are stuck
7.
Osmosis is the movement of _____ across a membrane.
a)
food
b)
energy
c)
oxygen
d)
water
8.
Which way will the water molecules move during osmosis?
a)
Out of the cell, so the cell shrinks.
b)
Out of the cell, so the cell swells.
c)
Into the cell, so the cell shrinks.
d)
Into the cell, so the cell swells.
9.
The picture below is an example of _________________.
a)
osmosis
b)
isotonic
c)
diffusion
d)
active transport
10.

Which type of transport requires energy?

a)

diffusion

b)

passive transport

c)

active transport

d)

osmosis

11.

Active transport requires cellular energy and moves substances from area of ________________ concentration to ______________ concentration.

a)

low, low

b)

low, high

c)

high, low

d)

high, high

12.

Identify a mistake of this test.

a)

The test tube is not soaked in water bath

b)

Blue flame is used

c)

Only a few drops of Benedict's reagent is used

13.

This is emulsion test. Name ALL the mixtures used.

a)

Water

b)

Ethanol

c)

Oil

d)

Millon's reagent

e)

Filter paper

14.

Which of the following tests for starch?

a)

Iodine

b)

Benedict's

c)

Biuret

d)

Emulsion

15.

When protein is present Biuret turns...

a)

purple

b)

blue-black

c)

orange

d)

brick red

16.
Which biomolecule turns iodine solution black?
a)
complex carbohydrate (polysaccharide)
b)
protein
c)
simple carbohydrate (monosaccharide)
d)
lipid
17.
Which biomolecule does Benedict's solution test for?
a)
simple carbohydrate (monosaccharides)
b)
complex carbohydrates (polysaccharides)
c)
proteins
d)
lipids
18.

What is the job of a red blood cell?

a)

To carry electrical messages

b)

To absorb water from the soil

c)

To carry oxygen around the body

d)

To photosynthesise

19.

Which part of a plant is this cell found in?

a)

flower

b)

roots

c)

stem

d)

leaf

20.

What is the name of this type of cell?

a)

root hair cell

b)

red blood cell

c)

palisade leaf cell

d)

ciliated cell

21.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
CO2 + light + H2O --> O2 + Sugar
b)
CO2 + sugar + H2O --> O2 + light
c)
O2 + light + H2O --> CO2 + Sugar
d)
CO2 + O2 + H2O --> Light+ Sugar
22.

Identify structure 3 in the diagram

a)

Waxy cuticle

b)

Palisade mesophyll

c)

Upper epidermis

d)

Guard cell

23.

Identify structure 7 in the diagram.

a)

Guard cell

b)

Phloem

c)

Stomata

d)

Upper epidermis

24.

Recall the main role of the specialised plant cell below.

Guard cells

a)

Absorb water/mineral

b)

Open/close stomata

c)

Photosynthesis

25.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
26.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
27.
In the diagram, what is letter A? 
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
28.
Based on the graph, what is the optimal temperature for this enzyme? 
a)
15oC
b)
40oC
c)
30oC
d)
35oC
29.

How does an enzymes shape relate to its function?

a)

the shape of the enzyme has no relation to its function

b)

the enzyme is shaped specially for certain substrates to perform a specific reaction

c)

the enzyme shape acts as a receptor to certain products

d)

the enzyme shape can fit into specific substrates to cease a reaction

30.

Changes in pH and temperature can ___________________ an enzyme which causes it to lose its shape and affects its function.

a)

puncture

b)

denature

c)

double

d)

delete

31.
a)

A

b)

B

c)

C

d)

D

32.
a)

A

b)

B

c)

C

d)

D

33.
a)

A

b)

B

c)

C

d)

D

34.
a)

A

b)

B

c)

C

d)

D

35.
a)

A

b)

B

c)

C

d)

D

36.
a)

A

b)

B

c)

C

d)

D

37.
a)

A

b)

B

c)

C

d)

D

38.
a)

A

b)

B

c)

C

d)

D

39.
a)

A

b)

B

c)

C

d)

D

40.
a)

A

b)

B

c)

C

d)

D

41.
a)

A

b)

B

c)

C

d)

D

42.
a)

A

b)

B

c)

C

d)

D

43.
a)

A

b)

B

c)

C

d)

D

44.
a)

A

b)

B

c)

C

d)

D

45.
a)

A

b)

B

c)

C

d)

D

46.
a)

A

b)

B

c)

C

d)

D

47.
4 lines
48.
a)

A

b)

B

c)

C

d)

D

49.
The picture  is an example of _________________.
a)
isotonic
b)
diffusion
c)
osmosis
d)
active transport
50.

Which characteristic is shown: A plant switches position and follows the sunlight throughout the day.

a)

Grow and develop

b)

Respond to a stimulus

c)

Acquire and use energy

d)

Reproduce

51.
When particles move from areas of high concentration to areas less concentrated, this has taken place.
a)
diffusion
b)
mitosis
c)
endocytosis
d)
photosynthesis
52.
Which diagram best shows the end result of diffusion?
a)
F
b)
G
c)
H
d)
J
53.

What is DIFFUSION?

a)
b)
c)
d)
54.

How long does diffusion last?

a)

Until the concentration of particles in the system is equal

b)

(Select this answer and I swear i'll make it harder for you in the assessment task)

c)

Until a region in the system has a greater concentration of particles than the other

d)

Until the particles disappear from the system

55.

The movement of particles is __________, resulting in the particles being spread throughout the container

a)

Structured

b)

In a straight line

c)

Random

d)

In curved, way motions

56.
An increase in temperature does what to diffusion?
a)
Speeds it up
b)
Slows it down
c)
Has no effect
d)
I wish i knew. Really I do.
57.
Functions in energy production, known as the energy factory of the cell
a)
mitochondria
b)
chloroplast
c)
vacuole
d)
cytoplasm
58.
The control center that controls all the functions of the cell
a)
cytoplasm
b)
cell wall
c)
cell membrane
d)
nucleus
59.
Contains chlorophyll and is where photosynthesis takes place. Found in plant cells only.
a)
mitochondria
b)
chloroplast
c)
vacuole
d)
cytoplasm
60.
Semi-permeable layer around the cell that encloses the contents of the cell
a)
nucleus
b)
cell membrane
c)
cell wall
d)
chloroplast
61.
jelly-like substance that is located between the cell membrane and the nucleus
a)
mitochondria
b)
chloroplast
c)
vacuole
d)
cytoplasm
62.
I am found in plant cells. I am rigid, strong & stiff. I give support to the plant cell.  I give the cell it's box shape
a)
cell membrane
b)
cell wall
c)
chlorophyll
d)
mitochondria
63.
I store water in both plant and animal cells. What am I?
a)
cytoplasm
b)
ribosomes
c)
vacuole
d)
lysosomes
64.

Which of the following tests for starch?

a)

Iodine

b)

Benedict's

c)

Biuret

d)

Emulsion

65.
When large amounts of glucose is present Benedicts turns...
a)
purple
b)
blue-black
c)
brick-red
d)
green
66.
Mr. Slug was salted. Where was there more solute immediately after salting?
a)
Outside of the slug
b)
Inside of the slug
c)
There was no solute anywhere
67.
What does “high concentration area” mean?
a)
Spread out
b)
Tightly packed together
c)
Uncrowded
d)
Spacious
68.

What is a solute?

a)

A substance dissolved in another substance

b)

the substance doing the dissolving

69.

What is a solvent

a)

The one doing the dissolving

b)

The substance dissoved in another substance

70.

I am used to test for the presence of complex carbohydrates (starch)

a)

Benedict's Test

b)

Biuret Test

c)

Iodine Test

d)

Ethanol Emulsion Test

71.

I am used to test for the presence of simple carbohydrates (sugars)

a)

Benedict's Test

b)

Biuret Test

c)

Iodine Test

d)

Ethanol Emulsion Test

72.

I am used to test for the presence of protein

a)

Benedict's Test

b)

Biuret Test

c)

Iodine Test

d)

Ethanol Emulsion Test

73.

Which of the following tests for glucose?

a)

Iodine

b)

Benedicts

c)

Biuret

d)

Emulsion

74.

A negative test for protein will cause Biuret to stay...

a)

brick red

b)

blue

c)

black

d)

orange

75.

A negative test for glucose will cause Benedicts to stay...

a)

brick red

b)

blue

c)

black

d)

orange

76.

What is a positive result for the lipid emulsion test?

a)

milky white colour

b)

clear

c)

yellow

d)

green

77.

In this experiment, you must put your test tubes into a hot water bath

a)

Benedict's Test

b)

Biurets Test

c)

Iodine Test

d)

Ethanol Emulsion Test

78.

This photo represents a

a)

negative test for glucose

b)

negative test for protein

c)

positive test for starch

d)

positive test for glucose

79.

What is  covalent bonding?

a)

is a chemical bond that involves the sharing of electron pairs between two non-metals

b)

is a physical bond that involves the sharing of electron pairs between two metals

80.

How are covalent bonds formed?

a)

By sharing electrons

b)

Gaining electrons

c)

Losing electrons

d)

By sharing protons

81.

Which two types of elements can form a covalent bond?

a)

Two metals

b)

Two non-elements

c)

Two non-metals

d)

Two elements

82.

How many single bonds are in this compound ?

a)

Four

b)

Zero

c)

Two

d)

Eight

83.

How many double bonds are in this compound

a)

Two

b)

One

c)

Three

d)

Four

84.

Which Gas caused a lighted splint to make a "pop" sound?

a)

Helium gas

b)

Nitric Gas

c)

Hydrogen gas

d)

Water vapor

85.

Which Chemical substance turns cloudy when carbon dioxide bubbles through it.

a)

Carbon monoxide

b)

Limewater

86.

What is the process that removes CO2 from the atmosphere?

a)

Photosynthesis

b)

Evaporation

c)

Condensation

d)

Respiration

87.

The atmosphere gets respiration and carbon from the plants and animals.

a)

True

b)

False

88.

Plant uses Photosynthesis to make ______________ and __________________.

a)

Oxygen and Acid

b)

Glucose and oxygen

c)

Acid and Gases

89.

Why does ice floats on water ?

a)

None of the above

b)

Ice floats because the water is lighter than the heavier ice

c)

Ice floats because the water is heavier than the lighter ice

90.

What is Mass ?

a)

Measure of the amount of matter in an object .

b)

The area of an object

c)

The width of an object

d)

None of the above

91.

What is Density ?

a)

Is the measurement that compares the amount of density an object has to its volume

b)

None of the above

c)

Is the measurement that compares the amount of matter an object has to its volume

92.

What the formula for Density

a)

D=M/D

b)

D= D/V

c)

D= M/V

d)

D=M/V/D

93.
Which of the following is NOT a function of the digestive system?
a)
Breaking down food into molecules the body can use
b)
Absorb molecules into the blood and carry them throughout the body
c)
Food allows blood cells to flow through arteries and veins
d)
Eliminate waste
94.
If food is in the esophagus, which letter represents where it will go next in the digestive system?  
a)
B
b)
C
c)
D
d)
E
95.
Carbon has an atomic number of 6. What can you conclude about carbon from this fact?
a)
It has six protons
b)
It has six neutrons 
c)
It's in group 6
d)
It's in period 6
96.
To become positively charged, an atom must:
a)
Gain a proton
b)
Lose a proton
c)
Gain an electron
d)
Lose an electron
97.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
98.
Ions are: 
a)
atoms with a positive or negative charge
b)
atoms with no charge
c)
atoms with ONLY a positive charge
d)
atoms with ONLY a negative charge
99.
Which of the following is a REACTANT of photosynthesis?
a)
Oxygen
b)
Carbon dioxide
c)
Sugar
d)
Heat
100.
What do atoms contain?
a)
elements, neutrons, and bonds
b)
protons, neutrons, and electrons
c)
protons, molecules, and elements
d)
electrons, protons, and bonds
101.
Why are coal, oil, and natural gas considered nonrenewable resources?
a)
There is a limited supply, and they can be replaced in a short period of time.
b)
There is not a limited supply, and they cannot be replenished in a short period of time.
c)
There is a limited supply, and they cannot be replenished in a short period of time.
d)
There is not a limited supply, and they can be replaced in a short period of time.
102.
What kinetic energy?
a)
Energy of Motion
b)
Potential Energy
c)
Food Energy
103.
What tool is used to measure weight or force?
a)
spring scale
b)
balance
c)
hand lens
d)
tape measure
104.

In an element box, the number at top is the

a)

atomic number

b)

atomic name

c)

atomic mass

d)

atomic symbol

105.

___________________ are positively charged particles located in the nucleus of an atom.

a)

Electrons

b)

Neutrons

c)

Protons

d)

Isotopes

106.

Elements on the Periodic Table are ordered according to their

a)

element name

b)

element symbol

c)

number of atoms

d)

atomic number

107.

Column in the Periodic Table are called

a)

Periods

b)

Groups/Families

c)

Cousins

d)

Metals

108.

The chemical symbol in this element box is

a)

26

b)

Fe

c)

Iron

d)

55.845

109.

A force of 20 N does 10 J of work when it moves an object through a distance d in the direction of the force.

What is distance d?

a)

0.5m

b)

2.0m

c)

10m

d)

200m

110.

Which is the result of a diet lacking in iron?

a)

Osteoporosis

b)

Goiter

c)

Tooth decay

d)

Anemia

111.

What is the process that moves food through the gut called?

a)

Digestion

b)

Diffusion

c)

Propulsion

d)

Peristalsis

112.

What is the deficiency of Vitamin A called?

a)

Anemia

b)

Night Blindness

c)

Tooth Decay

d)

Scurvy

113.

Which acid is produced by the stomach?

a)

Pepsin

b)

Hydrochloric Acid

c)

Gastric Juice

d)

Amino Acid

114.

A piece of metal has a volume of 2.0 × 10−5 m3 and a density of 8.0 × 103 kg / m3.

What is its mass?

a)

A. 2.5 × 10−3 kg

b)

A. 4.0 × 10−2 kg

c)

A. 1.6 × 10−1 kg

d)

A. 1.6 × 10−3 kg

115.

Grams and kilograms measure...

a)

capacity

b)

length

c)

time

d)

mass

116.

Acceleration occurs when:

a)

an object speeds up

b)

an object slows down

c)

an object travels at the same velocity but changes directions

d)

all are correct

117.

If your weight is 504 N on Earth and 84 N on the moon, which of the following would be true on if you were able to travel to Neptune, a planet larger than Earth.

a)

Your weight would be the same.

b)

Your weight would be more due to a greater gravitational pull.

c)

Your weight would be less due to a greater gravitational pull.

d)

Your weight would be less due to a smaller gravitational pull.

e)

Your weight would be less due to a smaller gravitational pull.

118.

Which diagram shows the MOST dense object?

a)

left

b)

center

c)

right

119.

A block of aluminum occupies a volume of 15.0 mL and weighs 45.0 g. What is its density?

a)

3 g/mL

b)

0.3333 g/mL

c)

675 g/mL

d)

I have no idea

120.

A sample of liquid has a mass of 300 g and occupies 50 mL in a graduated cylinder. What is the density?

a)

15,000 g/mL

b)

.16667 g/mL

c)

6 g/mL

d)

Yup, still no clue

121.
What is the ability to work called?
a)
electricity
b)
transfer
c)
generator
d)
energy
122.
What form of energy is being converted to electrical energy with this bike?
a)
light
b)
motion
c)
sound
d)
heat
123.
Batteries store energy as _________ energy.
a)
motion
b)
solar
c)
chemical
d)
electrical
124.
A train travels 25 km in .5 hrs. How fast is the train going?
a)
25 miles/hr
b)
5 miles/hr
c)
125 km/hr
d)
50 km/hr
125.
What is the equation to calculate distance?
a)
distance = speed/time
b)
distance = time/speed
c)
distance = speed/distance
d)
distance = speed x time 
126.
A boat travels at 22 km/hr for 10 hrs, what distance will it travel?
a)
220 miles
b)
2.2 km
c)
220 km
d)
22 km
127.
A ____________ is a push or a pull on an object.
a)
friction
b)
force
c)
magnet
d)
gravity
128.
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?
a)
60 N right
b)
10 N left
c)
60 n right
d)
50 N left
129.
Which substance supports burning?
a)
Hydrogen
b)
Nitrogen
c)
Oxygen
d)
Carbon Dioxide
130.
How many protons are in Beryllium?
a)
4
b)
9
c)
5
d)
2
131.
How many neutrons are in a Gold atom?
a)
79
b)
196
c)
118
d)
275
132.
How many electrons does a Copper atom have?
a)
63
b)
29
c)
92
d)
34
133.
How many electrons does an Iodine atom have?
a)
53
b)
126
c)
73
d)
179
134.

What is at the center of every atom?

a)

An electron

b)

A compound

c)

A molecule

d)

A nucleus

135.
Which two particles make up the nucleus of an atom?
a)
Protons and Electrons
b)
Protons and Neutrons
c)
Molecules and Compounds
d)
Neutrons and Electrons
136.
In an atom, what is the number of protons equal to?
a)
The number of electrons.
b)
The number of neutrons.
c)
The number of molecules.
d)
The number of nuclei.
137.
Which of the following determines the type of element that an atom makes?
a)
The size of the nucleus.
b)
The number of protons.
c)
How much the atom weighs.
d)
The number of neutrons.
138.
What part of blood carries hemoglobin?
a)
Red blood cells
b)
Plasma
c)
Platlets
d)
White blood cells
139.
What is the function of hemoglobin?
a)
to carry iron
b)
to carry wastes
c)
to carry oxygen
d)
to produce oxygen
140.

The characteristic of life that involves using oxygen to release energy from food is

a)

respiration

b)

excretion

c)

assimilation

d)

sensitivity

141.

The characteristic of life that removes wastes from your body is

a)

respiration

b)

excretion

c)

assimilation

d)

sensitivity

142.

The diagrams below show plant cells. Identify the cell membrane.

a)
b)
c)
d)
143.

Animal cells can be distinguished from plant cells easily because of which of the following?

a)

Animal cells have mitochondria and plant cells do not.

b)

Plant cells have nucleus and animal cells do not

c)

Only plant cells have cell membrane

d)

Only plant cells have large central vacuoles and cell walls.

144.

What is the technical term for the long, thin part of a sperm that enables it to move?

a)

Cilia

b)

Hair

c)

Flagellum

d)

Tail

145.

Which type of plant cell contains the most chloroplasts?

a)

Root hair cell

b)

Spongy mesophyll cell

c)

Palisade cell

d)

Phloem cell

146.

Which type of human body cell contains no nucleus?

a)

Sperm cell

b)

Brain cell

c)

Red blood cell

d)

Heart muscle cell

147.

Why do red blood cells have no nucleus? Choose the most accurate answer.

a)

To make more space for haemoglobin to carry oxygen

b)

To make more space for oxygen

c)

To make them more streamlined

d)

So that they can be smaller to pass through blood vessels

148.

A person would never have pure water put into their veins in a hospital because their cells would...

a)

Shrink; because water would escape from their cells

b)

Swell and burst; because water would enter their cells

c)

Stay the same

149.

An animal cell placed in a salty solution will

a)

Shrink

b)

Swell and burst

c)

Stay the same

150.

A blood cell is placed into the jar, as seen. Where will the water go?

a)

Into the cell

b)

Out of the cell

c)

Same rate in and out

d)

The diagram does not make sense. Ms Sam intends to trick us.

151.

What is the formula of Glucose?

a)

C3H16O36

b)

C632H123O239

c)

C6H12O6

d)

C12H6O12

152.

How do you test for lipids?

a)

By using Ethanol and water

b)

By using Benedicts solution

c)

By using Iodine

d)

By using Biuret test

153.

How do you calculate acceleration?

a)

a = (v + u) / t

b)

a = (v - u) x t

c)

a = (v - u) / t

d)

a = (v + u) x t

154.

How many electrons does carbon have?

a)

13

b)

6

c)

12

d)

8

155.

How do you calculate the number of neutrons in an atom?

a)

Mass number - Atomic number

b)

Atomic number - Mass number

c)

Mass number + Atomic number

d)

Mass number / Atomic number

156.

How do you calculate kinetic energy?

a)

KE = m / v

b)

KE = m x v2

c)

KE = 0.1 x m x v

d)

KE = 0.5 x m x v2

157.

In Figure 1, what does the area between the curve and the time axis show?

a)

acceleration

b)

distance

c)

force

d)

speed

158.
What is the temperature range in which a substance can change from a solid to a liquid?
a)
Melting Point - Freezing Point
b)
Boiling Point - Freezing Point
c)
Melting Point - Condensation Point
d)
Boiling Point - Condensation Point
159.
What is the change of state from a solid to a gas called?
a)
Melting
b)
Boiling
c)
Sublimation
d)
Evaporation
160.
What is the force exerted by gas particles against the walls of the container?
a)
Pressure
b)
Gravity
c)
Weight
d)
Mass
161.
What is the process of changing a gas into a liquid called?
a)
Boiling
b)
Condensation
c)
Evaporation
d)
Sublimation
162.
What is the equation for Pressure?
a)
Pressure = Force ÷ Area
b)
Pressure = Force × Area
c)
Pressure = Volume ÷ Area
d)
Pressure = Volume × Area
163.
What is the change of state from a gas to a solid called?
a)
Condensation
b)
Deposition
c)
Sublimation
d)
Evaporation
164.
What is the movement of particles in a solid called?
a)
Vibration
b)
Rotation
c)
Translation
d)
Oscillation
165.

Elements in Group 6 forms negative ions with a charge of 6- ions.

a)

TRUE

b)

FALSE

166.

The trend across the periodic table from left to right is metals, non - metals and metalloids.

a)

TRUE

b)

FALSE

167.
What is the charge of a proton?
a)
Positive
b)
Negative
c)
Neutral
d)
Variable
168.

What is the equation for work done?

a)

Work done = force × distance

b)

Work done = mass × gravity × height

c)

Work done = current × voltage

d)

Work done = power × time

169.

Which of these is a renewable energy source?

a)

Coal

b)

Oil

c)

Wind

d)

Natural gas

170.

Which type of energy is stored in food?

a)

Kinetic

b)

Chemical

c)

Elastic

d)

Thermal

171.

Which of these is an example of wasted energy in a car engine?

a)

Kinetic energy

b)

Chemical energy

c)

Thermal energy

d)

Electrical energy

172.

What is the law of conservation of energy?

a)

Energy cannot be transferred

b)

Energy cannot be created or destroyed, only transferred

c)

Energy is always lost as heat

d)

Energy is only transferred by forces

173.

What is the equation for gravitational potential energy?

a)

GPE = mass × gravity × height

b)

GPE = force × distance

c)

GPE = 0.5 × mass × velocity²

d)

GPE = power × time

174.

What is the unit of energy?

a)

Newton

b)

Joule

c)

Watt

d)

Pascal

175.

How can energy loss from a house be reduced?

a)

Using thicker walls

b)

Using black surfaces

c)

Increasing the number of windows

d)

Removing insulation

176.

What is the main disadvantage of fossil fuels?

a)

They do not produce energy

b)

They are expensive

c)

They release carbon dioxide

d)

They are renewable

177.

What type of energy store is filled when you lift an object?

a)

Chemical

b)

Gravitational potential

c)

Kinetic

d)

Elastic potential

178.

What type of energy is stored in a moving car?

a)

Chemical

b)

Kinetic

c)

Elastic

d)

Gravitational

179.

What is a disadvantage of wind power?

a)

It produces carbon dioxide

b)

It is unreliable

c)

It takes up little space

d)

It is expensive to run

180.

What happens to wasted energy?

a)

It disappears

b)

It is transferred to the surroundings

c)

It is stored for later use

d)

It is destroyed

181.

What is the main disadvantage of hydroelectric power?

a)

It releases carbon dioxide

b)

It is unreliable

c)

It requires large areas of land

d)

It is very expensive to maintain

182.

What is the primary source of energy for the Earth?

a)

Geothermal

b)

Solar

c)

Nuclear

d)

Wind

183.
A combination that can be separated by physical processes is a .....
a)
Pure Substance
b)
Glucose
c)
Element
d)
Mixture
184.

Which of the following are made from a combination of 2 or more elements chemically combined?

a)

Molecules

b)

Pure Substances

c)

Compounds

d)

Elements

185.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
186.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds

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