Phase changes, changes, graphs

Question 1

What is condensation?

Answer 1

A transition from gas to liquid.

Question 2

What is sublimation?

Answer 2

A transition from solid to gas

Question 3

What is melting?

Answer 3

A transition from solid to liquid

Question 4

What is freezing?

Answer 4

A transition from liquid to solid

Question 5

What is evaporation?

Answer 5

A transition from liquid to gas.

Question 6

What is the density of water, and what does it mean?

Answer 6

The density is 1 gram per cm^3, and it tells you anything that sinks in water has a greater density than 1 will sink, and anything less than 1 will float.

Question 7

What is the boiling point of water?

Answer 7

100 degrees Celsius

Question 8

What is the freezing point of water?

Answer 8

0 degrees Celsius.

Question 9

What are some properties of solids?

Answer 9

They have a fixed shape and volume. They do not take the shape of the container that they are placed in.

Question 10

What are some properties of liquids?

Answer 10

They have a fixed volume but not shape. They take the shape of the container that they are in.

Question 11

What are some properties of gases?

Answer 11

They do not have a fixed volume or shape. They take the shape of the container they are in.

Question 12

What is a physical change?

Answer 12

A change in a piece of matter that can be observed or measured without changing the matter’s identity.

Question 13

What is an example of a physical change?

Answer 13

Breaking a window, coloring a piece of paper, snapping a ruler, changing state.

Question 14

What is a chemical change?

Answer 14

Describes matter based on it’s ability to change into new matter that has different properties.

Question 15

What is an example of a chemical change?

Answer 15

Burning wood, rust, digesting food, soured milk, baking bread.

Question 16

What is the most dense state of matter?

Answer 16

Solid

Question 17

What is the least dense state of matter?

Answer 17

Gas

Question 18

The Y axis of a heating/cooling curve graph is always ____

Answer 18

Temperature (in degrees celsius)

Question 19

The X axis of a heating/cooling curve graph is always ____

Answer 19

Time (in minutes)

Question 20

On a plateau, the ____ stays the same until the substance has fully changed state.

Answer 20

Temperature

Question 21

What change is usually reversible?

Answer 21

Physical

Question 22

What is an example of a liquid?

Answer 22

Water, tea, lemonade, milk.

Question 23

What is an example of a solid?

Answer 23

Wood, table, Lego, metal.

Question 24

What is an example of a gas?

Answer 24

Nitrogen, oxygen, carbon.

Question 25

What is an example of sublimation?

Answer 25

Dry ice

Question 26

What is an example of melting?

Answer 26

Ice being heated, turning to water

Question 27

What is an example of freezing?

Answer 27

Water being chilled, turning to ice.

Question 28

What is an example of condensation?

Answer 28

Water droplets collecting on the outside of a plastic waterbottle

Question 29

What is an example of evaporation?

Answer 29

Boiling water, it turning into water vapor.

Question 30

When kinetic energy goes ___ particle to particle attraction goes ___.

Answer 30

Up, down.

Question 31

What is the difference between chemical and physical changes?

Answer 31

Physical changes do not involve a change in property, or change in compound. Chemical changes do.

Question 32

What is the opposite of sublimation?

Answer 32

Deposition.

Question 33

What state of matter has the most kinetic energy and particle motion?

Answer 33

Gas

Question 34

What state of matter has the least kinetic energy and particle motion?

Answer 34

Solid

Question 35

On a plateau, the temperature stays the same until the phase change is over. True or false?

Answer 35

True.