Science - Unit 2 - Lessons 1-3

Question 1

Definition:

property that can be observed without changing the identity of a substance

Answer 1

physical property

Question 2

Definition:

the amount of matter in an object

Answer 2

mass

Question 3

Definition:

the amount of space that matter takes up

Answer 3

volume

Question 4

Definition:

the measurement of how much mass fits within a certain volume; found by dividing the mass of an object by its volume

Answer 4

density

Question 5

Definition:

the way a substance reacts with other substances

Answer 5

chemical property

Question 6

Definition:

a change in matter that produces a new substance with different properties from the original

Answer 6

chemical change

Question 7

Definition:

a small particle that makes up matter

Answer 7

atom

Question 8

Definition:

the measurement of the pull of gravity on an object

Answer 8

weight

Question 9

Definition:

materials that can flow; example: liquids and gases

Answer 9

fluids

Question 10

Definition:

describes the ability of an object to float in a fluid

Answer 10

buoyancy

Question 11

Definition:

states the buoyant force is equal to the weight of the fluid that is displaced

Answer 11

Archimedes principle

Question 12

Definition:

have a definite shape and occupy a definite volume

Answer 12

solid

Question 13

Definition:

have a definite volume but do not have a definite shape

Answer 13

liquids

Question 14

Definition:

do not have a definite shape or a definite volume

Answer 14

gases

Question 15

Definition:

a measure of the average kinetic energy of the particles in a material

Answer 15

temperature

Question 16

Definition:

the temperature at which the solid melts to become a liquid

Answer 16

melting point

Question 17

Definition:

the temperature at which a liquid changes to a solid

Answer 17

freezing point

Question 18

Definition:

the temperature at which a liquid boils

Answer 18

boiling point

Question 19

What are the 3 states of matter?

Answer 19

1. solid
2. liquid
3. gas

Question 20

What is sublimination?

Answer 20

Sublimination is when a substance changes directly from a solid to a gas without going through a liquid state.

Question 21

Explain density.

Answer 21

Density describes how tightly the particles that make up matter are packed together.

Density = mass / volume

Question 22

What is the density formula?

Answer 22

density = mass / volume

Question 23

What is the formula for volume?

Answer 23

volume = length x width x height

Question 24

What is an example of Archimedes’ principle?

Answer 24

• ice floating in a glass
• boat floating in the water
• balloon floating in the air

Question 25

Describe buoyancy.

Answer 25

The ability of an object to float in a fluid.

Question 26

Name 4 physical property examples.

Answer 26

1. conductivity 2. malleability 3. ductility 4. hardness

Question 27

What is the force exerted by gas?

Answer 27

pressure