Changes of state, atomic structure, and periodic table

Question 2

How do changes of state occur?

Answer 2

when matter transforms from one state to another. ex. liquid (water) to solid (ice)

Question 3

What happens when temp increases?

Answer 3

particles gain energy and move faster and farther apart.

Question 4

What is a melting point?

Answer 4

the temp at which a substance melts

Question 5

Boiling point?

Answer 5

the temp at which a substance boils

Question 6

What is diffusion?

Answer 6

the movement of particles from an area of high concentration to low concentration.

Question 7

Solid, liquids, gases, expand?

Answer 7

when heated.

Question 8

Solid, liquids, gases contract?

Answer 8

When cooled.

Question 9

What is the meaning of thermal expansion?

Answer 9

is the increase in volume of a substance when its temperature is increased. ex. heating increases kinetic energy particles

Question 10

What is the meaning of thermal contraction?

Answer 10

it is the decrease in volume of a substance when its temperature is lowered. ex. cooling, decreases kinetic energy of particles.

Question 11

Order and meaning:

Answer 11

vaporization: liquid to gas
condensation: gas to liquid
freezing: liquid to solid
melting: solid to liquid
deposition: gas to solid
sublimation: solid to gas

Question 12

Identify the following: tomato soup, air, manganese, and carbon dioxide.

Answer 12

tomato soup: mixture
air: mixture
manganese: element
carbon dioxide: compund