1.3 changing states of matter

Question 1

evaporate

Answer 1

to change a liquid to a gas

Question 2

condense

Answer 2

to change from a liquid to a gas to a liquid

Question 3

melt

Answer 3

to change from a solid to a liquid

Question 4

water vapor

Answer 4

the gas state of water

Question 5

freeze

Answer 5

to change from liquid to solid

Question 6

element

Answer 6

a pure substance that cannot be broken down into any simpler substance

Question 7

compound

Answer 7

any substance that is formed by the chemical combination of two or more elements and acts like a single substance

Question 8

atom

Answer 8

the smallest unit of an element the retains the properties of that element.

Question 9

proton

Answer 9

a particle in the nucleus of an atom that carries 1 unit of positive electric charge

Question 10

neutron

Answer 10

a particle in the nucleus of an atom that has no net electric charge

Question 11

electron

Answer 11

a particle in the space outside the nucleus of an atom that carries on unit of negative electric charge

Question 12

nucleus

Answer 12

a dense structure inside the cell

Question 13

molecules

Answer 13

a particle that contains more than one atom joined together