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Science Revision - Chemestry and Physics

Total questions: 75

Worksheet time: 48mins

Name
Class
Date
1.
A chemical change happens when...
a)
a substance is changed at the atomic level 
b)
bonds are broken and formed 
c)
a new substance is made
d)
all of the above! 
2.
Chemical Formulas ...
a)
are written in alphabetical order 
b)
represent the destruction or creation of atoms 
c)
represent how atoms are arranged in a chemical reaction 
3.
The compounds or elements present at the end of a reaction 
a)
reactants
b)
catalyst
c)
products
d)
energy 
4.
The compounds and elements that are present at the beginning of a reaction:
a)
reactants
b)
catalyst
c)
products
d)
energy 
5.
What is the law of Conservation of Mass?
a)
A measure of how much mass is created or destroyed. 
b)
Mass can neither be created nor destroyed during a chemical reaction. 
6.
What is a reactant?
a)
The starting substance
b)
The ending substance
7.
What is a product?
a)
The starting substance
b)
The ending substance
8.
Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the reactant(s).
a)
Hydrogen and Oxygen
b)
water
9.
Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the product(s).
a)
Hydrogen and oxygen
b)
water
10.
Angelina mixes 2 substances together in a beaker. The beaker becomes hot and the liquid changes color.
Did a chemical reaction occur?
a)
yes, because the properties changed and a new substance was made.
b)
no, because the properties did not change.
11.
Which of the following are NOT signs that a chemical reaction occured?
a)
the properties changed
b)
bubbles of gas formed
c)
color stays the same
d)
smells different
12.
What is a precipitate?
a)
a change in color 
b)
a change in temperature
c)
a solid formed
d)
a gas formed
13.
Burning is always a chemical reaction.
a)
True
b)
false
14.
Sandra was burning a vanilla candle. Was there a chemical reaction?
a)
no, because burning is never a chemical reaction.
b)
Yes, because the properties of the wick changed.
c)
yes, because heat was added.
d)
no, because the ash formed was a different substance.
15.

What does a represent?

a)

Proton

b)

Neutron

c)

Electron

16.

What does b represent?

a)

Proton

b)

Neutron

c)

Electron

17.

What does c represent?

a)

Proton

b)

Neutron

c)

Electron

18.

What is the atomic mass of this element?

a)

20

b)

60

c)

40

d)

41

19.

What is the symbol of this element?

a)

Calcium

b)

P

c)

Ca

d)

C

20.
Water is an element?
a)
true
b)
false
21.

A molecule is

a)

a singular particle of a particular element

b)

another name for an element

c)

2 or more atoms that are combined

22.

A pure substance that is a compound is made out of

a)

particles of more than one type of atom

b)

particles of the same type of atom

c)

a mixture of two or more substances that can be physically separated

23.

What is the number of protons that the element in this image contain?

a)

14

b)

7

c)

15

d)

18

24.
"C" is the element symbol for which element?
a)
calcium
b)
carbon
c)
chlorine
d)
cadmium
25.
A _________ is a substance made of two or more DIFFERENT elements chemically combined. 
a)
mixture
b)
compound
c)
substance 
26.

What is the atomic number of this element?

a)

20

b)

60

c)

40

d)

41

27.

what is an atom

a)

smallest part of the universe

b)

smallest part of a substance

c)

smallest part of anything

d)

smallest part of water

28.

How many atoms of sodium (Na) are in one molecule of baking soda?

a)

1

b)

2

c)

3

d)

4

29.

Ozone and Oxygen molecules are the same substance because they both are made only of oxygen atoms.

a)

true

b)

false

30.

How many atoms make up one molecule of laughing gas?

a)

1

b)

2

c)

3

d)

4

31.

Using the information provided, determine how many electrons the a Boron atom contains.

a)

2.5

b)

5

c)

6

d)

10.81

32.
The state of matter having no definite shape or volume.
a)
solid
b)
liquid
c)
gas
33.
As a material is heated, it's particles....
a)
get smaller
b)
slow down
c)
get cooler
d)
move more quickly
34.
The state of matter with definite volume but no definite shape.
a)
solid
b)
liquid 
c)
gas
35.
What state of matter forms a geometric pattern?  It is also the coldest state of matter.
a)
solid
b)
liquid
c)
gas
36.

When something goes from gas to liquid, it is called...

a)

Evaporation

b)

Condensation

c)

Deposition

d)

Freezing

37.

Something that goes from liquid to gas is...

a)

Evaporation

b)

Melting

c)

Freezing

d)

Sublimation

38.

Which of the following sentences are true about solids?

a)

Solids are rigid, have a fixed shape but not a fixed volume

b)

Solids are not rigid, have a fixed shape and no fixed volume

c)

Solids are rigid, have a fixed shape and a fixed volume

39.
Which of the following statements about the particle of a gas is true?
a)
Gases can be compressed because their particles are smaller than those of liquids or solids.
b)
Gases can be compressed because there is plenty of space between their particles.
c)
Gases can be compressed because they have low boiling points.
d)
Gases can be compressed because their particles are more elastic than those of liquids or solids.
40.
An inflated balloon is placed in a refrigerator. Which statement describes the movement of the gas particles in the balloon?
a)
The particles move more slowly and become closer together.
b)
The particles move more slowly and become further apart.
c)
The particles move faster and become closer together.
d)
The particles move faster and become further apart. 
41.

Particles are always moving.

a)

True

b)

False

42.
When particles collide with each other they...
a)
transfer kinetic energy
b)
stop completely still
c)
become smaller
d)
lose all their energy
43.
Temperature is a measure of particle...
a)
kinetic energy
b)
size
c)
colour
d)
electrostatic force
44.
Absolute zero is the temperature (in Kelvin), at which, only in theory...
a)
all particles stop moving
b)
time stands still
c)
space and time merge
d)
energy goes to infinity
45.
When the temperature of matter decreases the particles ...
a)
speed up and move farther apart
b)
speed up and move closer together
c)
slow down and move farther apart
d)
slow down and move closer together
46.
Railroad tracks have gaps between rails so they don't buckle in hot weather because
a)
thermal conductivity
b)
specific heat
c)
thermal expansion
d)
thermal insulation
47.
Thermal energy always moves:
a)
From a high temperature object to a lower temperature object.
b)
From a lower temperature object to a higher temperature object.
c)
From an object with lower kinetic energy to an object with higher kinetic energy.
d)
From an object of higher mass to an object of lower mass.
48.
The liquid in a thermometer ______________ as the temperature increases.
a)
expands
b)
disappears
c)
freezes
d)
explodes
49.
What is between air particles?
a)
Particles of oxygen
b)
Particles of nitrogen
c)
Nothing
d)
Other elements
50.

What is a hypothesis?

a)

the thing changed on purpose in the experiment

b)

an explanation about what you observed

c)

using your 5 senses to gather data

d)

an educated guess about the outcome of an experiment

51.

What two words should be in your hypothesis?

a)

I think

b)

If ...then...

c)

It will

d)

No idea

52.

What variable comes after the word IF

a)

independent variable

b)

dependent variable

53.

What variable comes after the word then?

a)

independent variable

b)

dependent variable

54.

When is a hypothesis written?

a)

before you decide on a question

b)

after the experiment

c)

before the experiment

d)

after the conclusion

55.

The independent variable is

a)

the part the scientist measures

b)

the part the scientist changes or is testing

c)

a letter

56.

The dependent variable is the part

a)

the letter in the equation

b)

the part being changed

c)

the part being measured

57.

When we write a conclusion, we state

a)

that our hypothesis was correct or incorrect.

b)

that our hypothesis was proven or disproven.

c)

that out hypothesis was a good guess or a poor guess.

58.
When smelling a liquid, you should
a)
Inhale deeply
b)
Use a fan
c)
Waft the odor toward you
d)
Pour it on the table and test it
59.

What is an observation?

a)

A scientific statement based on ideas

b)

Using your senses to notice what is going on around you

c)

To be unaware of your surroundings

d)

The question that you want an answer to.

60.
A series of steps used by scientists to solve a problem or answer a question. 
a)
scientific method
b)
recipe
c)
data collection
d)
metric system
61.
The scientific method is made up of several:
a)
stones
b)
experiments
c)
problems
d)
steps
62.
What is the Scientific Method?
a)
The steps to making an experiment.
b)
The steps to making proving your hypothesis is right.
c)
Don't know.
d)
The six steps to making an experiment.
63.
What is the general trend of this line graph?
a)
The more you mow, the less money you make.
b)
You make the same amount of money regardless of how long you mow.
c)
The more you mow, the more money you make.
d)
Mowing is dangerous.
64.
The X axis is _______?
a)
vertical
b)
diagonal
c)
criss-cross
d)
horizontal
65.
The Y axis is _______?
a)
Vertical
b)
Horizontal
c)
criss-cross
d)
diagonal
66.
What is the main purpose of a line graph?
a)
to compare two things
b)
to show trends over time
c)
to have an independent variable
d)
so you don't have to read words
67.
How much does it cost to have your lawn mowed for 2 hours?
a)
$16
b)
$17
c)
$18
d)
$19
68.
What is the independent variable?
a)
cost of mowing
b)
Moe's Mowing Service
c)
$18
d)
Mowing Time
69.

Which variable should be on the x axis?

a)

dependent variable

b)

independent variable

c)

control variable

70.

How can you create a 'fair test'?

a)

By changing one factor and keeping all the other conditions constant

b)

By changing some variables but keeping one constant

c)

But repeating the experiment more than 10 times

d)

By allowing each scientist to record the results separately

71.

Which variable should be on the y axis?

a)

the dependent variable

b)

the independent variable

c)

the control variable

72.
A line graph is used when. which of the following is true?
a)
An independent variable is continuous
b)
An independent variable is not continuous
c)
A dependent variable is not continuous
d)
No variable is continuous
73.

What was the temperature of the liquid in the Styrofoam container at 4:00?

a)

55 degrees

b)

68 degrees

c)

73 degrees

d)

63 degrees

74.

What data does this graph represent?

a)

This graph represents the change in temperature of a liquid over time in 3 different containers.

b)

This graph represents how temperature can change the molecules in a material.

c)

This graph represents the phase changes of a material.

d)

This graph represents what type of container people use the most to store hot liquids.

75.
The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many pages would be in a book with 19 chapters. 
a)
150 pages
b)
170 pages
c)
190 pages
d)
210 pages

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