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Grade 8 Science - Mix and Flow Unit Test Practice

Total questions: 80

Worksheet time: 2hrs 26mins

Name
Class
Date
1.

Solids have...

a)

Definite Shape & Definite Volume

b)

Indefinite Shape & Definite Volume

c)

Indefinite Shape & Indefinite Volume

d)

Definite Shape & Indefinite Volume

2.

Change of State

Gas to Solid

a)

Condensation

b)

Solidification

c)

Sublimation

d)

Fusion

3.

Change of State

Gas to Liquid

a)

Sublimation

b)

Condensation

c)

Solidification

d)

Vaporization

4.

Which state of matters does ice belong to ?

a)

Liquids

b)

Semi-solids

c)

Solids

d)

Gases

5.

_______ is the amount of space an object takes up.

a)

Shape

b)

Weight

c)

Volume

d)

Temperature

6.

Distances between molecules are the greatest in ________.

a)

semi-solids

b)

liquids

c)

solids

d)

gases

7.
A mixture that is NOT evenly distributed is called ....
a)
Compounded
b)
Homogenous
c)
Heterogenous
d)
Salty
8.
A mixture that is so evenly mixed you can't see the parts.  Such as Kool-Aid
a)
Homogeneous Mixture
b)
Heterogeneous Mixture
c)
Pure Substance
d)
Confusing Concoction
9.
What is viscosity?
a)
A liquid's resistance to flow.
b)
a liquids flow.
c)
a liquid
d)
gas to solid.
10.
salt water is a 
a)
compound
b)
element
c)
heterogeneous mixture
d)
solution
11.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
12.
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
13.
Another name for a homogeneous mixture is 
a)
an element.
b)
a solution.
c)
a compound.
14.
In this mixture, which of the following will be the solute?
a)
The water in the glass
b)
The glass that holds the final mixture
c)
The solution containing both powder and water
d)
The powder on the spoon
15.

Water is a universal solvent because it ...

a)

freezes when it gets cold.

b)

can be found anywhere.

c)

floats when frozen.

d)

dissolves most substances.

16.

A higher temperature makes the solute dissolve faster

a)

True

b)

False

17.

The rate at which a solute will dissolve into a solvent. Some factors that increase this include: surface area, temperature, pressure, and stirring

a)

Solute

b)

Rate of Dissolving (Solution)

c)

Concentration

d)

Colloid

18.
Which substance is MOST soluble at 0 ºC?
a)
KI
b)
NaNO3
c)
NaCl
d)
Ce2(SO4)3
19.
When 20 grams of KNO3 is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
20.

Mass is measured in

a)

mL

b)

grams

c)

units

d)

air

21.

Volume is measured in

a)

grams

b)

units

c)

milliliters ( mL)

d)

pounds

22.

Which statement is true about this picture?

a)

The dish soap is more dense than the honey

b)

The cherry tomato is more dense than the milk

c)

The honey is less dense than the bolt

d)

The water is less than the lamp oil

23.

What is density?

a)

The amount of matter in a unit of volume

b)

How heavy something is

c)

How old something is

24.

Which state of matter is most dense?

a)

solid

b)

liquid

c)

gas

25.

An object's mass is 12 g and its volume is 4ml. What is the density?

a)

4 g/ml

b)

16 g/ml

c)

3 g/ml

d)

6 g/ml

26.

What can be the opposite force to the force of gravity?

a)

Displacement force

b)

Buoyant force

c)

Normal force

d)

Magnetic force

27.

What is it called when an object is neither floating or sinking?

a)

positive buoyant

b)

negative buoyant

c)

neutral buoyant

28.
Which box has a higher density?  
a)
Box A
b)
Box B
c)
cannot be determined
d)
they are the same
29.

If the temperature was cooled down, how would this affect syrup's flow rate?

a)

It would go up

b)

It would go down

c)

It would not change

d)

It is impossible to tell

30.

How are a hydraulic system and pneumatic system different?

a)

One is more powerful than the other.

b)

One uses a gas, and the other uses a liquid.

c)

One has a pump, and the other does not.

d)

One has more valves than the other.

31.

Low viscosity can be described as...

a)

liquids that flow quickly

b)

liquids that flow slowly

32.
A piece of copper has a mass of 89g and a volume of 10 cm3.  What would be the density of the copper?
a)
0.89 g/cm3
b)
89 g/cm3
c)
8.9 g/cm3
d)
890 g/cm3
33.

Fluids with very high viscosity flow very _______________________.

a)

fast

b)

not at all

c)

slow

d)

whenever it wants

34.

Which of these are classified as fluids?

a)

Solid

b)

Liquid

c)

Gas

35.
When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. This fact is called________.
a)
Pascal's Principle
b)
Newton's Principle
c)
Archimedes' Principle
d)
Bernoulli's Principle
36.

When area increases...

a)

pressure increases

b)

pressure decreases

c)

pressure stays the same

d)

pressure increases then decreases

37.

In an airplane, the ears pop at higher altitudes because pressure inside the ear ....

a)

Higher than outside

b)

Lower than outside

38.
What is the unit of measurement for pressure?
a)
pascal
b)
grams
c)
milliters
d)
meters
39.

Pneumatics is concerned with a system that uses:

a)

Oil

b)

Expanded air

c)

Compressed air

d)

Electricity

40.

Both liquids and gases can be compressed

a)

True

b)

False

41.

An example of a compound is

a)

sand and water

b)

oxygen

c)

water

d)

water and salt

42.

The milk is the _________ and the coffee is the ____________.

a)

homogeneous mixture, mixture

b)

solvent, solute

c)

compound, mixture

d)

solute, solvent

43.
The change from gas to a solid is called ________________.
a)
Sublimation
b)
Freezing
c)
Deposition
d)
Condensation
44.

An _______________ is made up of one or more of the same kind of atom chemically combined.

a)

atom

b)

element

c)

molecule

d)

compound

45.

A __________________ is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity.

a)

mixture

b)

pure substance

c)

compound

d)

element

46.
What does the particle diagram show?
a)
solid
b)
liquid
c)
gas
d)
plasma
47.
What does the particle diagram show?
a)
solid
b)
liquid
c)
gas
d)
plasma
48.
As particles are exposed to warmer temperatures they __________
a)
speed up
b)
slow down
c)
stay the same
d)
vibrate
49.
As particles are exposed to colder temperatures they _____
a)
speed up
b)
slow down
c)
stay the same
d)
become ions
50.

According to the picture from left to right, which of the answers is correct?

a)

neurally buoyant, positively buoyant, negatively buoyant

b)

negatively buoyant, neutrally buoyant, positively buoyant

c)

positively buoyant, neutrally buoyant, negatively buoyant

d)

neutrally buoyant, negatively buoyant, positively buoyant

51.
A person wearing steel toe capped boots and a person wearing stilleto heels stand on a wooden floor. They both have the same weight. Which person exerts a greater pressure on the floor?
a)
The person wearing the boots because the boots have a larger surface area in contact with the floor
b)
The person with the stiletto heels because they have a larger surface area in contact with the floor
c)
The person wearing the boots because the boots have a smaller surface area in contact with the floor 
d)
The person with the stiletto heels because they have a smaller surface area in contact with the floor
52.

A car lift is an example of a hydraulic device.

a)

True

b)

False

53.

What does WHMIS stand for?

a)

Workplace Health Matters Information System

b)

Workplace Helps Make It Safe

c)

Workplace Hazardous Materials Information System

54.

What does PPE stand for?

a)

Perfect Physical Environment

b)

Personal Physical Environment

c)

Personal Protective Equipment

d)

Physical Protective Equipment

55.

What does this hazard symbol mean?

a)

Corrosive Material

b)

Compressed Gas

c)

Bio-hazardous Infectious Materials

d)

Dangerously Reactive Material

56.

What does this hazard symbol mean?

a)

Oxidizing Material

b)

Materials Causing Other Serious Toxic Effects

c)

Materials Causing Immediate and Serious toxic Effects

d)

Bio-hazardous Infectious Materials

57.

What is the name of the product?

a)

Acetic Acid

b)

White Vinegar

c)

Water Thin

58.

What is the name of the supplier?

a)

RF Vinegar

b)

White Vinegar

c)

Flexo Products

d)

Canutec

59.

Are any hazardous symbols located on the Clorox bleach label?

a)

Yes

b)

No

60.

What does this pictogram warn you about?

a)

gases under pressure

b)

fire hazard

c)

explosion or reactivity hazard

d)

may cause less serious health effects

61.

What does this pictogram warn you about?

a)

gases under pressure

b)

fire hazard

c)

explosion or reactivity hazard

d)

may cause less serious health effects

62.

What does this pictogram warn you about?

a)

gases under pressure

b)

fire hazard

c)

explosion or reactivity hazard

d)

may cause less serious health effects

63.

What does this pictogram warn you about?

a)

may cause or suspected of causing serious health effects

b)

oxidizing hazard

c)

organisms or toxins that cause diseases

d)

may cause death or toxicity with short exposure to small amounts

64.

What does this pictogram warn you about?

a)

may cause or suspected of causing serious health effects

b)

oxidizing hazard

c)

organisms or toxins that cause diseases

d)

may cause death or toxicity with short exposure to small amounts

65.

A fluid is ...

a)

a solid

b)

a substance that flows when poured

c)

only a liquid

d)

a substance that piles up when poured

66.

The buoyant force acting on an object that is submerged in a fluid equals the weight of the fluid that is displaced by the object. This describes which principle?

a)

Quinton's Principle

b)

Archimedes' Principle

c)

Aristotle's Principle

d)

Pascal's Principle

67.

This word describes a push or pull, or anything that causes a change in the motion of an object.

a)

Tension

b)

Force

c)

Compression

d)

Pneumatic

68.
What force causes the wood to float 
a)
weight
b)
density
c)
buoyant
d)
gravity
69.
If you place an object in a fluid and it sinks which is true 
a)
its weight is less than the buoyant force
b)
the fluid is more dense than the object
c)
its weight  is greater than the buoyant force
d)
dead men tell no tales 
70.

The basic idea behind any hydraulic system is very simple: Force that is applied at one point is tranitted to another point using________

a)

A compressible fluid

b)

An incompressible fluid

c)

A cold compress

d)

A hot compress

71.

It's important for a hydraulic system to contain what?

a)

Air bubbles

b)

No air bubbles

c)

Compressible fluid

d)

Compressible gas

72.

What does Pascal's law state?

a)

When you apply a small amount of pressure to a compressed fluid, it will send that pressure nowhere.

b)

When you apply pressure to a confined fluid, the fluid will send that pressure out in all directions at the same rate.

c)

When you apply a large amount of pressure to an object, it will float.

d)

When you use a fluid to apply pressure, the pressure will release.

73.
Look at the pressure triangle. How do we calculate the area?
a)
f ÷ a
b)
f x p
c)
p x f
d)
f ÷ p
74.
What pressure does a 4000N horse exert on the ground if each foot is 10cm2?
a)
40 N/cm2
b)
100 N/cm2
c)
400 N/cm2
d)
10 N/cm2
75.
Look at the pressure triangle. How do we calculate the force?
a)
f ÷ a
b)
f x p
c)
p x a
d)
f ÷ p
76.
A person wearing steel toe capped boots and a person wearing stilleto heels stand on a wooden floor. They both have the same weight. Which person exerts a greater pressure on the floor?
a)
The person wearing the boots because the boots have a larger surface area in contact with the floor
b)
The person with the stiletto heels because they have a larger surface area in contact with the floor
c)
The person wearing the boots because the boots have a smaller surface area in contact with the floor 
d)
The person with the stiletto heels because they have a smaller surface area in contact with the floor
77.
The pressure resulting from a force of 50 N exerted over an area of 5 m2 is
a)
10 N
b)
0.1 N
c)
10 N/m2
d)
0.1 Pa
78.

A box on the floor has a weight of 120 N. The surface area the box takes up is 4m2.

What is the pressure exerted by the box?

a)

30 Pa

b)

50 m2

c)

 50 Pa

d)

0.02 Pa

79.

A force of 240 N is applied to an area of 6.0m2. how much pressure is being applied to the surfaced?

a)

14,400 Pa

b)

40 Pa

c)

240 Pa

d)

6.0 m2

80.

A force creates a pressure of 12 Pa over an area of 6.0 m2. What is the magnitude of this force?

a)

72 N

b)

12 N

c)

6.0 N

d)

2 N

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