States of Matter and Density

Question 1

What is the formula for density

Answer 1

D = M/V (mass over volume)

Question 2

Does a high density object fall quickly or slowly when placed in water?

Answer 2

quickly

Question 3

If a liquid has a density of 0.45 g/ml will it sink or float

Answer 3

float

Question 4

If a substance has a density of 4.37 g/ml and you place a 4.57 g/ml object in the substance will it sink or float?

Answer 4

Sink

Question 5

What is the density of water?

Answer 5

1 g/ml

Question 6

If the volume of an object increases than what happens to the density?

Answer 6

It goes down

Question 7

If the mass of an object increases what happens to the density?

Answer 7

It goes up

Question 8

Why is salt water denser than fresh water?

Answer 8

more particles = salt adds mass = more matter in same volume

Question 9

Which is more dense, cold or hot water? Why?

Answer 9

Cold. This is because the molecules are closer together than hot water.

Question 10

What are some characteristics of a liquid?

Answer 10

The particles of a liquid are attracted to one another, The particles of a liquid are in motion, The particles of a liquid are able to move past each other and a liquid has mass and volume.

Question 11

What are the characteristics of a solid?

Answer 11

The particles of a solid are attracted to one another, The particles of a solid vibrate but do not move past one another, a solid has mass and volume.

Question 12

What are the characteristics of a gas?

Answer 12

The particles are not very attracted to each other and the particles of a gas are further apart than the particles in a liquid or solid.

Question 13

What is evaporation?

Answer 13

Liquid –> gas

Question 14

what is condensation?

Answer 14

Gas –> Liquid
- the water on your glass

Question 15

Melting

Answer 15

Solid –> Liquid
- when ice melts in your water

Question 16

Freezing

Answer 16

Liquid –> Solid
- when you make ice

Question 17

Sublimation

Answer 17

Solid –> Gas
- dry ice

Question 18

Deposition

Answer 18

Gas –> Solid
- need example

Question 19

What is the difference in density of solids, liquids, and gases?

Answer 19

Solids are the most densely packed having a fixed shape and volume while gas isn’t densely packed having no fixed shape or volume.

Question 20

Can you compress solids? Liquids? Gases?

Answer 20

No, No, Yes.

Question 21

When matter changes state does its mass change?

Answer 21

No it doesn’t.

Question 22

What are the freezing temperature and boiling temperature in C and F in water?

Answer 22

Freezing: 0 C and 32 F
Boiling: 100 C and 212 F

Question 23

True or False: In the 3 states of matter, in every phase change the mass stays the exact same but the volume may change.

Answer 23

True

Question 24

Does fresh water or saltwater have a higher boiling point? lower freezing point? Density?

Answer 24

Fresh. Salt. Salt

Question 25

Why does ice float in water?

Answer 25

Because its hydrogen bonds are so in order that they’re spread apart. But also because ice cubes have very little kinetic energy. Because of this, they become less dense than water making them float. Also, the volume of water increases when it freezes by 9%.

Question 26

Why is heat the only thing that transfers and not cold?

Answer 26

Because, in terms of science, there is no such thing as cold. Only lack of warmth.

Question 27

What does heat have to do with kinetic energy?

Answer 27

In substances that are hotter than others, you will notice that their molecules are moving much more and faster. That’s why when water gets really hot it starts to bubble/boil. Kinetic energy is the energy of motion so heat is kinetic.

Question 28

Which state of matter has the least and most energy?

Answer 28

Gas has the most and solid has the least.

Question 29

Thermometers measure density. Saying this, why would two different liquids at the exact same temperature measurements at different places on the thermometer?

Answer 29

Because two different substances mean two different densities.

Question 30

Why is saltwater sea ice worse to skate on than freshwater sea ice?

Answer 30

Because fresh water has a higher boiling point meaning it’s harder to melt fresh water so it’s safer to skate on fresh water.

Question 31

what are the 5 states of matter

Answer 31

Solid, liquid, gas, plasma and bose-einstein compensate

Question 32

What are the states of matter?

Answer 32

Solid, liquid, gas, plasma and Bose-Einstein condensate

Question 33

what formation does ice make?

Answer 33

Crystalline

Question 34

what is sea level rise? What are the three main factors of sea level rise?

Answer 34

Sea level rise is the rise of global sea levels. The three main factors are thermal expansion, the melting of glacier mountains and the melting of polar ice caps.

Question 35

When does water expand?

Answer 35

When it heats up (thermal expansion) and when it freezes (expands by 9%).

Question 36

Which states of matter can compress?

Answer 36

Only gas.

Question 37

What is matter?

Answer 37

Matter makes up everything in the world and is the measurement of mass.

Question 38

What does it mean that Carbon dioxide is a greenhouse gas?

Answer 38

It means it traps the heat into our atmosphere.

Question 39

What has the global average surface temperature been like recently?

Answer 39

It has been rising marking 2020 as the hottest ever due to humans.

Question 40

What is happening to sea ice?

Answer 40

It deforms it’s shape and is now shrinking.