Science revision

Question 1

What is a force?

Answer 1

A force is a push or pull acting upon an object.

Question 2

True or False: Force is a vector quantity.

Answer 2

True

Question 3

What is the SI unit of force?

Answer 3

Newton (N)

Question 4

Fill in the blank: The force of gravity acting on an object is called its _____ .

Answer 4

weight

Question 5

True or False: Friction is a force that opposes motion.

Answer 5

True

Question 6

What type of force is gravity?

Answer 6

Attractive force

Question 7

Fill in the blank: The _____ force is the force exerted by a surface to support the weight of an object resting on it.

Answer 7

normal

Question 8

What is the difference between mass and weight?

Answer 8

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Question 9

True or False: Action and reaction forces act on the same object.

Answer 9

False

Question 10

What is the force that opposes the relative motion of two surfaces in contact?

Answer 10

Friction

Question 11

What is the relationship between force, mass, and acceleration according to Newton’s Second Law?

Answer 11

Force is equal to mass multiplied by acceleration (F = ma).

Question 12

Fill in the blank: The force of attraction between two masses is known as _____ .

Answer 12

gravity

Question 13

What is the effect of balanced forces on an object?

Answer 13

Balanced forces do not change the motion of an object.

Question 14

What type of force is tension?

Answer 14

A pulling force transmitted through a string, rope, or cable.

Question 15

True or False: A larger mass requires more force to accelerate than a smaller mass.

Answer 15

True

Question 16

What is the gravitational force between two objects dependent on?

Answer 16

The masses of the objects and the distance between them.

Question 17

Fill in the blank: The _____ force is the force that opposes the motion of an object through a fluid.

Answer 17

drag

Question 18

True or False: The greater the surface area of an object, the greater the air resistance it experiences.

Answer 18

True

Question 19

What are the three main states of matter?

Answer 19

Solids, liquids, and gases.

Question 20

True or False: Solids have a definite shape and volume.

Answer 20

True.

Question 21

Fill in the blank: In a liquid, particles are ______ than in a solid.

Answer 21

closer together but can move past each other.

Question 22

What state of matter has a definite volume but no definite shape?

Answer 22

Liquid.

Question 23

Which state of matter has particles that are far apart and move freely?

Answer 23

Gas.

Question 24

What happens to the particles in a solid when it is heated?

Answer 24

They gain energy and may begin to vibrate more and eventually melt.

Question 25

True or False: Gases can be compressed easily.

Answer 25

True.

Question 26

What is the process called when a liquid turns into a gas?

Answer 26

Evaporation.

Question 27

Fill in the blank: The particles in a gas are ______ compared to solids and liquids.

Answer 27

far apart.

Question 28

What is the term for the change of state from solid to liquid?

Answer 28

Melting.

Question 29

What is the term for the change of state from liquid to solid?

Answer 29

Freezing.

Question 30

Which state of matter has the highest energy particles?

Answer 30

Gas.

Question 31

Fill in the blank: A solid's particles are arranged in a ______ structure.

Answer 31

fixed.

Question 32

What is condensation?

Answer 32

The process by which a gas turns into a liquid.

Question 33

True or False: All substances can exist in all three states of matter.

Answer 33

True.

Question 34

What is the boiling point of water?

Answer 34

100 degrees Celsius at standard atmospheric pressure.

Question 35

Fill in the blank: The process of a solid turning directly into a gas is called ______.

Answer 35

sublimation.

Question 36

What do we call the temperature at which a solid becomes a liquid?

Answer 36

Melting point.

Question 37

What is the primary characteristic of liquids?

Answer 37

They take the shape of their container.

Question 38

True or False: In a gas, the particles are closely packed together.

Answer 38

False.

Question 39

What is the measure of how much space a substance occupies?

Answer 39

Volume.

Question 40

Fill in the blank: The process of a liquid becoming a gas is called ______.

Answer 40

boiling.

Question 41

What happens to the volume of a gas when it is heated?

Answer 41

It expands.

Question 42

What is a common example of sublimation?

Answer 42

Dry ice turning into carbon dioxide gas.

Question 43

Fill in the blank: The particles in a liquid are ______ than those in a gas.

Answer 43

closer together.

Question 44

What is the term for the change of state from gas to solid?

Answer 44

Deposition.