Unit 1

Question 0

Atom

Answer 0

Smallest unit of matter

Question 1

Element

Answer 1

A pure substance made up of the same type of atom

Question 2

Molecule

Answer 2

Two or more atoms bonded together (they may be the same or different)
Ex: H2

Question 3

Compound

Answer 3

A substance containing two or more different elements in a fixed ratio

Question 4

Valence electrons

Answer 4

Electrons in the outermost shell involved in bond formation

Question 5

Polar bond

Answer 5

Results when two different non metals unequally share electrons between them

Question 6

Hydrogen bond

Answer 6

When one water molecule bonds to another molecule (weak bond)

Question 7

Solution

Answer 7

Liquid consisting of uniform mixture of two or more substances

Question 8

Solvent

Answer 8

Liquid (dissolving agent)

Question 9

Solute

Answer 9

Substances dissolved

Question 10

Cohesion

Answer 10

Water molecules stick to each other due to hydrogen bonding

Question 11

Adhesion

Answer 11

Water sticking to other substances

Question 12

Specific heat

Answer 12

Amount of heat a substance needs for a given increase in temperature

Question 13

Evaporative cooling

Answer 13

Some organisms pant/sweat to cool off when hot