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Particles, solutions and chemical reactions

Total questions: 72

Worksheet time: 1hrs 12mins

Name
Class
Date
1.

When a solute can dissolve in a solvent we say it is

a)

solute

b)

dissolves

c)

soluble

d)

solution

2.

When we lower the temperature of the solvent, the rate of dissolving of the solute will

a)

decrease

b)

saturated

c)

stir

d)

solution

3.

The substance that dissolves in the solvent is called the

a)

solute

b)

solvent

c)

soluble

d)

saturated

4.

The mixture of solute and solvent is called the

a)

soluble

b)

solute

c)

solution

d)

dissolves

5.

When we cannot dissolve any more solute in a solution, we say the solution is

a)

saturated

b)

solution

c)

dissolves

d)

soluble

6.

The substance that dissolves the solute is called the

a)

soluble

b)

solute

c)

solvent

d)

solution

7.

The solute … in the solvent.

a)

dissolves

b)

decrease

c)

stir

d)

saturated

8.

When we want the solute to dissolve more quickly we should … the solution.

a)

stir

b)

saturate

c)

dissolve

d)

solve

9.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
10.
Which of the following WILL NOT increase the rate that a sugar cube dissolves?
a)
Crushing up the sugar cube
b)
Mixing the cube as you stir
c)
heating up the water before mixing in the sugar
d)
adding an additional solute to the solution
11.
Which of the following factors does not effect solubility?
a)
Temperature
b)
Agitation (stirring)
c)
Color
d)
Surface Area of solute (size)
12.
What will allow more solute to be dissolved in a solvent.
a)
adding more solute
b)
evaporation
c)
cooling solution
d)
heating solution
13.
Lonnie stirred some sugar into a pitcher of lemonade.

   
What happened to the sugar? 
a)
The sugar floated to the top surface
b)
The sugar disappeared after it was stirred.
c)
The sugar dissolved in the lemonade
d)
The sugar all settled to the bottom of the pitcher
14.

When dissolving sugar in water... Sugar melts.

a)

True

b)

False

15.

When dissolving sugar in water... sugar loses mass.

a)

True

b)

False

16.

When dissolving sugar in water... sugar molecules spread out in the water.

a)

true

b)

false

17.

When dissolving sugar in water... sugar forms a mixture with the water.

a)

true

b)

false

18.

When dissolving sugar in water... the sugar disappears and no longer exists.

a)

true

b)

false

19.

When dissolving sugar in water... the sugar can be separated from the water.

a)

true

b)

false

20.

When dissolving sugar in water... the sugar molecules break apart and is not sugar anymore.

a)

true

b)

false

21.
Look at the diagram. In this diagram, the red dots represent
a)
the solute
b)
the solvent
c)
the solution
22.

water can't dissolve ...............

a)

sugar

b)

oil

c)

salt

d)

coffe

23.

Which will dissolve faster crushed table salt or crystal of table salt?

a)

crushed table salt

b)

crystal of table salt

24.

To press together, to force into less space.

a)

Thermal Expansion

b)

Density

c)

Compression

d)

Dissolving

25.

When temperature increases (gets "hotter"), the volume of matter increases (gets bigger).

a)

Dissolving

b)

Compression

c)

Thermal Expansion

d)

Diffusion

26.

All _____ is made of tiny _____, called atoms and molecules.

a)

matter, particles

b)

matter, elements

c)

particles, matter

d)

Matter, mixtures

27.

The _____, of matter are always _____.

a)

speed, constant

b)

particles, moving

c)

volume, consistent

d)

particles, faster

28.

There are always _____ between the particles that make up matter.

a)

movement

b)

spaces

c)

speed

d)

temperature

29.

Volume is how much _____ an object occupies.

a)

matter

b)

space

c)

mass

d)

particles

30.

This picture is an example of...

a)

Compression

b)

Diffusion

c)

Thermal Expansion

d)

Dissolving

31.

Which of the following is not a chemical change?

a)

food coloring dissolving in water

b)

leaves turning color

c)

fruit ripening

d)

silver tarnishing

32.

New substances are produced by a _______ change.

a)

Chemical

b)

Physical

33.

How could you prove that dissolving table salt in water is a physical change, not a chemical change?

a)

The solution would taste salty so you would know the salt is still present

b)

Boiling the liquid would separate the water and salt.

c)

Freeze the solution to see if it turns blue.

d)

Poor the solution in a cup to see if bubbles form.

34.

An ______ change releases energy.

a)

exothermic

b)

endothermic

35.

The law of ______ of mass states that in any physical or chemical change, matter is neither created nor destroyed.

a)

conservation

b)

elimination

c)

creation

d)

combustion

36.

Which of the following is not a physical change?

a)

cooking bacon

b)

glass breaking

c)

sugar disolving

d)

ice melting

37.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
38.

Is melting butter for popcorn a chemical or physical change?

a)

chemical

b)

physical

39.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
rust
40.
Freezing Juice?
a)
Physical Change
b)
Chemical Change
41.
A change where one or more new substances are created.
a)
Physical Change 
b)
Chemical Change 
42.

Change in color is a physical change.

a)

True

b)

False

43.
Fizzing, foaming, and burning are all examples of
a)
Chemical change
b)
Physical change
44.

Rust on an iron bar is an example of chemical change.

a)

True

b)

False

45.

When you break a cracker into pieces it is a...

a)

Chemical change

b)

Physical change

46.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
47.
Digesting your food is an example of 
a)
chemical change
b)
physical change
48.
Which is an example of a chemical reaction?
a)
paper cut into small pieces
b)
chocolate melting in a pan
c)
flour and sugar mixed in a bowl
d)
cookies baking in an oven
49.

A ______________ is a substance that increases the speed of a reaction.

a)

catalyst

b)

product

c)

reactant

d)

solute

50.
What is the left part of a chemical equation called?
H2 + O → H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
51.

elements or compounds that start a chemical reaction and undergo a change.

a)

product

b)

reactant

c)

yield

d)

law of conservation of mass

52.

substance that is produced in a chemical reaction

a)

product

b)

reactant

c)

yield

d)

law of conservation of mass

53.

Three things that are needed for combustion are:

a)

oxygen, nitrogen and carbon dioxide

b)

fuel, oxygen and carbon dioxide

c)

fuel, heat and oxygen

d)

fuel, heat and carbon dioxide

54.

What does a fuel need in order to burn?

a)

fuel

b)

electricity

c)

oxygen

d)

hydrogen

55.

What is the scientific term given when something burns?

a)

a fuel

b)

flammable

c)

combustion

d)

heating

56.

True or false: A change in state is a chemical reaction

a)

True - something melting would be an example of a chemical reaction

b)

False - a change in state is a physical change

57.

What is produced when a fuel burns?

a)

nitrogen and carbon dioxide

b)

water and hydrogen

c)

nitrogen and hydrogen

d)

water and carbon dioxide

58.
What is essential for a combustion reaction to begin?
a)
Carbon dioxide
b)
Fuel 
c)
Fuel, oxygen and heat
d)
Water and oxygen
59.

The word equation for combustion is:

fuel + oxygen --> water + ..........................................

a)

Carbon dioxide

b)

Limewater

c)

Hydrogen

d)

Nitrogen

60.

The word equation for combustion is:

fuel + oxygen --> water + ..........................................

a)

Carbon dioxide

b)

Limewater

c)

Hydrogen

d)

Nitrogen

61.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
62.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 
a)
Warm
b)
Cold
63.
What happens to particles as they heat up?
a)
They slow down
b)
Nothing
c)
They don't move
d)
They speed up
64.
The change from a gas to a liquid is called 
a)
condensation
b)
evaporation
c)
sublimation
d)
deposition
65.
In which state of matter are particles moving the slowest?
a)
solid
b)
liquid
c)
gas
d)
gummy bears
66.
What is the melting point of water?
a)
212°C
b)
100°C
c)
32°C
d)
0°C
67.
What is it called when the state of matter changes from a liquid to a solid?
a)
Vaporization
b)
Freezing
c)
Condensation
d)
Melting
68.

What is the boiling point of water?

a)

212°C

b)

100°C

c)

32°C

d)

0°C

69.

A substance's melting point is the same as its

a)

freezing point.

b)

condensation point.

c)

boiling point.

70.

If you have a sample of water that is 144 °C, what state is it in?

a)

solid

b)

liquid

c)

gas

71.

If you have a sample of water that is 44 °C, what state is it in?

a)

solid

b)

liquid

c)

gas

72.

On a hot, humid summer day drops of water form on a can of cold soda. What process caused this to happen?

a)

condensation

b)

freezing

c)

vaporization

d)

deposition

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