Cells Chapter 2

Front 1

element

Back 1

any substance that cannot be broken down into simpler substances

Front 2

atom

Back 2

the smallest unit of an element

Front 3

compound

Back 3

when to or more elements combine to form a ______.

Front 4

molecule

Back 4

the smallest unit of most compounds

Front 5

enzyme

Back 5

a type of protien that speeds up chemical reactions in a living thing

Front 6

without _____, most chemical reactions within _______ could not take place.

Back 6

water; cells

Front 7

name 3 meathods that substances that can move into and out of a cell

Back 7

diffusion
osmosis
active transport

Front 8

diffusion

Back 8

the process by which molecules tend to move from an area of higher concentration to an area of lower concentration

Front 9

osmosis

Back 9

the diffusion of water molecules through a selectively permeable membrame

Front 10

passive transport

Back 10

the movement of materials throurgha cell membrane without using energy

Front 11

active transport

Back 11

is the movement of materials througha cell membrane using energy

Front 12

name the main difference between passive transport and active transport

Back 12

is that active transport requires the cell to use enery while passiv etransport does not

Front 13

chlorophyll

Back 13

the main pigment found in cloroplasts

Front 14

photosyntheisis

what happens during it?

Back 14

the process in which a cell captures the energyin sunlight and uses it to make food
------------------------------ converts carbon dioxide and water into sugers and oxygen

Front 15

pigments

Back 15

colored chemical compounds that absorb light