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Chemistry and Energy Review 2

Total questions: 76

Worksheet time: 52mins

Name
Class
Date
1.

When hydrochloric acid reacts with magnesium to produce hydrogen gas

a)

physical change

b)

chemical change

2.

Burning a piece of paper is an example of a

a)

Physical Change

b)

Chemical change

3.

Scrambling eggs is an example of

a)

A physical change

b)

A chemical change

c)

Solution

4.

Tearing paper into small pieces is an example of a

a)

Mixture

b)

Physical change

c)

Chemical change

5.

Which of the following is a chemical change?

a)

Cutting bread

b)

Slicing carrots

c)

Melting butter

d)

Soured milk

6.

Which of the following is a physical change?

a)

Ice melting

b)

Baking potatoes

c)

Rusty nail

d)

Rotting wood

7.

Which change creates a NEW substance?

a)

Physical change

b)

Chemical Change

8.
Is water melting a physical or chemical change?
a)
Physical
b)
Chemical
9.
Is a firefly lighting up a physical or chemical change?
a)
Physical
b)
Chemical
10.
Is digesting your food a physical or chemical change?
a)
Physical
b)
Chemical
11.
Is a tree sprouting a physical or chemical change?
a)
Physical
b)
Chemical
12.
Is melting iron a physical or chemical change?
a)
Physical
b)
Chemical
13.
Is a car using fuel a physical or chemical change?
a)
Physical
b)
Chemical
14.
Is bending copper wire a physical or chemical change?
a)
Physical
b)
Chemical
15.
Which is NOT a physical property:
a)
Density
b)
Flammability
c)
Boiling Point
d)
Color
16.
Which is a physical change?
a)
Liquid water freezing into solid ice
b)
Burning wood
c)
Silver tarnishing
d)
Iron rusting
17.

What is a precipitate?

a)

a solid created from two liquids

b)

two liquids

c)

two gases mixed together

d)

rain falling from the sky

18.

Broken glass is a

a)

chemical change

b)

physical change

19.

Melting butter for popcorn is a

a)

chemical change

b)

physical change

20.

Salt dissolved in water is a

a)

physical change

b)

chemical change

21.

Chewing food is a

a)

physical change

b)

chemical change

22.

Which phrase most accurately describes a chemical change?

a)

A change on the molecular level.

b)

A change in appearance.

c)

A change in taste.

d)

A change in size.

23.

Rust on a bike is an example of chemical change.

a)

True

b)

False

24.
Which is an example of a solute?
a)
Egg whites
b)
Sugar
c)
Water
d)
Acetone
25.
Which is an example of a solvent?
a)
Salt
b)
Egg whites
c)
Water
d)
Sugar
26.

What is a solvent

a)

A liquid that will dissolve a solid solute

b)

Another word for solution

c)

A thing that make drinks change colour

d)

Usually the solid about to be dissolved

27.

A solution is the same as a homogeneous mixture.

a)

True

b)

False

28.

What does the Bohr Model represent?

a)

The structure of molecules

b)

The structure of the Solar System

c)

The structure of an atom

d)

The structure of East Hills

29.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
30.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
31.
The number in front of a compound or element is a 
a)
Subscript
b)
Coefficient
c)
Superscript
d)
Charge
32.
A chemical reaction is balanced when
a)
both sides have the same elements
b)
Both sides have the same  number of atoms
c)
Same subscripts
d)
Same coefficients
33.
The coefficient in  3H2O is
a)
6
b)
2
c)
3
d)
5
34.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
35.
Is this equation balanced or unbalanced? 
2Fe2O3 + 3C --> 4Fe + 3 CO2
a)
balanced
b)
unbalanced
36.
Which is Chemical Equation is Balanced?
a)
CH₄+O₂------CO₂+2H₂O
b)
H₂+O₂-----2H₂O₄
c)
4Al+3O₂-----2Al₂O₃
37.
Bob puts 200 grams of ice into a pitcher with 900 grams of water. He gets distracted and comes back later to find that the ice has melted in the water. How many grams of water does Bob now have in the pitcher?
a)
200 g
b)
700 g
c)
1,100 g
38.

What are the products of the chemical reaction pictured?

a)

CH4 and CO2

b)

CH4 and O2

c)

CO2 and H2O

d)

O2 and H2O

39.
What is the left part of a chemical equation called?
H2 + O → H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
40.
Consider the chemical equation CH4 + 2 O2 → CO2 + 2 H2O. In this equation, CH4 is a
a)
product
b)
reactant
c)
displacement
41.
2H2 + O2 ----> 2H2O What is the product?
a)
------>
b)
2H2O
c)
2H2+ O2
42.

Which of the following are Subscripts in this Chemical Formula: 3Fe2O4

a)

3,4

b)

3,2

c)

2,4

d)

6

43.
The coefficient in  3H2O is
a)
6
b)
2
c)
3
d)
5
44.

Which Chemical Equation is Balanced?

a)

CH₄+O₂------CO₂+2H₂O

b)

H₂+O₂-----2H₂O₄

c)

4Al+3O₂-----2Al₂O₃

45.
The number of atoms of  N (nitrogen) in 3N2O5 is
a)
2
b)
5
c)
6
d)
15
46.

Resources that are not able to be reproduced as quickly as they are used are called _____.

a)

renewable resources

b)

replaceable resources

c)

non renewable resources

d)

non replaceable resources

47.

Geothermal energy uses heat from ____ to produce electricity.

a)

the earth

b)

coal

c)

oil

d)

natural gas

48.

Coal is burned to heat water so that the _______ can turn turbines.

a)

fire

b)

steam

c)

water

d)

heat

49.

What type of power plant uses the potential energy of water trapped behind a dam?

a)

nuclear power plant

b)

hydroelectric power plant

c)

solar station

d)

coal burning power plant

50.

What are fossil fuels?

a)

coal, oil, uranium

b)

oil, natural gas, uranium

c)

coal, oil, natural gas

d)

geothemals, coal, natural gas

51.

Petroleum is mainly used in the United States for...

a)

gasoline for cars

b)

running coal burning power plants

c)

making windmills turn

d)

burning for heat

52.

A photovoltaic cell captures ____ to be used for power.

a)

wind

b)

water

c)

coal

d)

sunlight

53.

What type of power plant uses scraps from farming, waste products and wind to generate electricity?

a)

Hydroelectric Power Plant

b)

Geothermal Power Plant

c)

Biomass Power Plant

d)

Nuclear Power Plant

54.

Uranium atoms are split to create a tremendous amount of heat in a _____ power plant.

a)

biomass

b)

geothermal

c)

nuclear

d)

hydroelectric

55.

Which are non renewable resources?

(Choose all correct answers)

a)

natural gas

b)

coal

c)

water in a dam

d)

oil

e)

nuclear energy

56.

Which of these are renewable resources?

a)

coal

b)

wind

c)

geothermal

d)

water in a dam

e)

biomass

57.

Which of these is non renewable

a)

natural gas

b)

water in a dam

c)

solar power

d)

wind energy

58.

Solar Power is a __________ energy resource.

a)

Renewable

b)

Non-renewable

59.

Oil is a __________ energy resource.

a)

Renewable

b)

Non-renewable

60.

Hyrdo Power is a __________ energy resource.

a)

Renewable

b)

Non-renewable

61.

Choose ALL the ways that using natural resources can be harmful...

a)

mining and oil spills can damage ecosystems

b)

they make our lives easier

c)

burning coal or other fossil fuels can cause air and water pollution

d)

used products can fill landfills or litter beaches and other natural areas

62.

Fossil Fuels can cause acid rain and smog. Is this a pro or con

a)

Pro

b)

Con

63.

Fossil Fuels are inexpensive to obtain and use. Is this a pro or con?

a)

Pro

b)

Con

64.

_________ of renewable resources involves a variety of _____________ practices.

a)

Stewardship and conservation

b)

Profits and money-making

c)

Burning and helpful

65.

When we ______ products, we avoid using resources to make new products.

Using a water bottle, instead of buying bottled water, conserves water and oil.

a)

Reduce

b)

Reuse

c)

Recycle

66.
Petroleum and natural gas form from...
a)
strong winds
b)
cooled magma
c)
radioactive materials
d)
remains of plants and animals 
67.
Fossil fuels are classified as nonrenewable because they.......
a)
require expensive equipment
b)
take millions of years to replace
c)
can be found all over 
d)
provide all the energy we use
68.
The careful use of a resource is....
a)
recycling
b)
pollution
c)
depositing
d)
conservation
69.

What are possible negative outcomes of forest being cleared to make room for farmland?

a)

Fewer trees for animal habitats

b)

Fertilizers create run-off into a nearby stream, polluting it.

c)

Less room for animals to hunt and find shelter

d)

Birds find seeds and insects on plowed fields

70.

Which of the following has a positive impact on the environment? (comparatively)

a)

Coal power

b)

Solar power

c)

Landfills

d)

Recycling

71.

What are some things you can do to conserve energy and help protect our environment?

a)

leave water on, leave TV on, run dishwasher with 1 plate

b)

run the washing machine with 1 shirt

c)

leave the refrigerator door open

d)

turn off water, turn off lights, turn off TV

72.

Which one is an example of recycling? 🌟

a)

Reusing a paper bag for lunch.

b)

Using less water to take a bath.

c)

Making new glass bottles from old ones.

d)

Using plastic cups instead of paper cups.

73.
Where is pollution found on the earth?
 
 
  
a)
only in the air 
b)
only on the land 
c)
only in the water 
d)
on land, in the air, and in the water 
74.
Why is it important that people conserve, or  save, resources?
 
 
  
a)
They will become renewable.
b)
They will be used up quickly. 
c)
Their supplies will increase. 
d)
They will last longer.
75.
One problem with ____ energy is that it produces radioactive waste. 
a)
nuclear
b)
solar
c)
tidal
d)
geothermal
76.

What is one of the biggest disadvantages to wind turbines?

a)

They're huge

b)

Needs consistent wind to work efficiently

c)

They're expensive to make

d)

It takes a long time to put one up and maintain htme

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