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Changes in Matter & P/C Changes

Total questions: 51

Worksheet time: 43mins

Name
Class
Date
1.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
2.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
3.
Salt water is a 
a)
compound
b)
element
c)
heterogeneous mixture
d)
solution
4.
Which of the following factors does not effect solubility?
a)
Temperature
b)
Agitation (stirring)
c)
Color
d)
Surface Area of solute (size)
5.
What will allow more solute to be dissolved in a solvent.
a)
adding more solute
b)
evaporation
c)
cooling solution
d)
heating solution
6.
A tablespoon of salt is added to a glass of water. In this example, the salt is the
a)
solvent
b)
solute
c)
solution
7.
Look at the diagram. In this diagram, the red dots represent
a)
the solute
b)
the solvent
c)
the solution
8.
Look at the diagram. In this diagram, the blue area represents
a)
the solute
b)
the solvent
c)
the solution
9.

Three 10 g samples of sugar are represented below.


Sample A dissolves in water more slowly than sample B.

Sample B dissolves more slowly than sample C.

Which of the following best explains why sample A dissolves more slowly than the other two?

a)

It has the most volume.

b)

It has the smallest surface area.

c)

It has the largest number of sugar molecules.

d)

It has the fewest bonds between sugar modules.

10.

Which of the following factors affects solubility?

a)

temperature

b)

agitation

c)

surface area

d)

all of the above

11.

Stirring the solution increases or decreases the solubility?

a)

increases

b)

decreases

c)

neither

d)

increases the chances of making a big mess!

12.

The smaller the particle size results in a....

a)

increase in solubility

b)

decrease in solubility

c)

decrease in surface area

d)

increase in bond strength

13.

When you dissolve sugar cubes in tea, the tea is the ____________.

a)

solvent

b)

solute

14.
__________ are made up of solutes and solvents.
a)
Solutions
b)
Suspension
c)
Colloid
d)
mixtures
15.

Besides stirring, which of the following should be done to make this powder dissolve faster in the liquid?

a)

Add heat to the liquid

b)

Cool the liquid in a freezer

c)

Add more powder to the liquid

d)

Store the mixture in a dark place

16.

Which of the following would not be considered an agitation to increase dissolving?

a)

shaking the solute/solvent mix

b)

stirring the solute solvent mix

c)

swirling the solute/solvent mix

d)

cooling the solute/ solvent mix

17.
What does it mean to dilute a solution?
a)
lower the concentration of solute per solvent
b)
increase the concentration of solute per solvent
18.

What is the definition of dilution?

a)

The process of converting a solute into a solvent by adding more solution.

b)

The process of reducing the concentration of a solute in a solution by adding more solvent.

c)

The process of increasing the concentration of a solute in a solution by adding more solvent.

d)

The process of separating a solute from a solution by adding more solvent.

19.
Anna filled a ​cup with hot tea. Then she added a sugar cube. ​Which of these will help to make the sugar cube dissolve more quickly? 
a)
stirring the hot tea
b)
adding more sugar cubes
c)
adding ice to the tea
d)
pouring more tea into the cup
20.
Ernesto and Amanda fill two cups with water. They use hot water in one cup and cold water in the other cup. Next, they will stir a spoon of salt into each cup.     

In which cup will the salt dissolve more slowly? 
a)
The salt will not dissolve in either cup
b)
The salt dissolves more slowly in the hot water
c)
The salt dissolves more slowly in the cold water
d)
The salt dissolves at the same speed in both cups
21.
You can make a solution more concentrated by adding __________.
a)
solute
b)
solvent
c)
water
22.

If I want more sugar to dissolve in water, I should heat the water

a)

true

b)

false

23.

If I want more sugar to dissolve in water, I should stir the water

a)

true

b)

false

24.

In a mixture of salt water, what will be the solute?

a)

Water

b)

Oxygen

c)

Hydrogen

d)

Salt

25.
____ is another name for a homogeneous mixture. 
a)
Solution
b)

Colloid

c)
Substance
d)
Liquid 
26.

This term means: The ability to dissolve in a solvent?

a)

Element

b)

Disperse

c)

Soluble

27.

What kind of mixture is shown in the picture?

a)

Homogeneous

b)

Heterogeneous

28.

What kind of mixture is shown in the picture?

a)

Homogeneous

b)

Heterogeneous

29.

What kind of mixture is shown in the picture?

a)

Homogeneous

b)

Heterogeneous

30.

What kind of mixture is shown in the picture?

a)

Homogeneous

b)

Heterogeneous

31.

A __________________ is defined as a homogeneous mixture of two or more substances.

a)

Solution

b)

Solvent

c)

Solute

d)

Compound

32.

Which of the following actions will NOT

increase the rate of dissolution

(dissolving)?

a)

Stirring the solution

b)

Decreasing the temperature

c)

Increasing the surface area of the

solute

d)

Increasing the temperature

33.

Four solutions are prepared in beakers. In all solutions, 20 g of sugar are added to 100 mL of water. Beaker A is placed on the lab table at room temperature (25ºC). Beaker B is placed in the refrigerator. Beaker C is placed on a hot plate set at 40ºC. In what order would the beakers be arranged to show the dissolving of sugar from fastest to slowest?

a)

A, B, C

b)

C, B, A

c)

C, A, B

d)

B, C, A

34.

Solids dissolve faster at higher temperatures because

a)

the molecules of the solvent have more energy and move quickly.

b)

the molecules of the solvent have less energy and move slower.

c)

the particles of solvents at higher temperatures are densely packed and only vibrate in place.

d)

they are more concentrated.

35.

Crushing a solute

a)

decreases the amount of contact it has with the solvent, decreasing the rate of dissolving.

b)

increases the amount of contact it has with the solvent, increasing the rate of dissolving.

c)

decreases the amount of contact with the solvent and increases the rate of dissolving.

d)

increases the amount of contact it has with the solvent and decreases the rate of dissolving.

36.
When one of the parts of the solution is water we call it _________. 
a)
water stuff 
b)
water mixture 
c)
aqua-man
d)
aqueous 
37.
a)

solvent

b)

solute

38.

In which beaker does salt dissolves faster?

a)

Hot water

b)

Room temperature

c)

Ice watet

39.
One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?
a)
evaporation; chemical change
b)
condensation; physical change 
c)
evaporation; physical change
d)
condensation; chemical change
40.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
41.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
42.
Is spoiled meat a chemical or physical change?
a)
chemical
b)
physical
43.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

44.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

45.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

46.

Which process describes only a physical change?

a)

Process 1

b)

Process 2

c)

Process 3

d)

Process 4

47.

Choose the best description below for the image

a)

physical change

b)

chemical change

48.

Choose the best description below for the image

a)

physical change

b)

chemical change

49.
Physical properties are
a)
properties that can be observed without changing the identity of the substance
b)
properties that describe how a substance changes into a completely different substance
50.

You mixed two liquids and a precipitate formed, what kind of change occured?

a)

Physical

b)

Chemical

51.

Which of the following does NOT indicate a chemical reaction is occurring? Check all that apply.

a)

Unknown A dissolves into Unknown B

b)

Unknown A creates fizzing and bubbles when combined with Unknown B

c)

Unknown A sinks to the bottom when added to Unknown B

d)

Unknown A floats to the top when added to Unknown B

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