Unit 1 Flashcards Preview

Biology > Unit 1 > Flashcards

Flashcards in Unit 1 Deck (14)
Loading flashcards...
0

Element

A pure substance made up of the same type of atom

1

Atom

Smallest unit of matter

2

Molecule

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

3

Compound

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

4

Valence electrons

Electrons in the outermost shell involved in bond formation

5

Polar bond

Results when two different non metals unequally share electrons between them

6

Hydrogen bond

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

7

Solution

Liquid consisting of uniform mixture of two or more substances

8

Solvent

Liquid (dissolving agent)

9

Solute

Substances dissolved

10

Cohesion

Water molecules stick to each other due to hydrogen bonding

11

Adhesion

Water sticking to other substances

12

Specific heat

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

13

Evaporative cooling

Some organisms pant/sweat to cool off when hot