Environmental chemistry

Question 1

Biodegradation

Answer 1

Breakdown of materials by organisms

Question 2

Heavy metals

Answer 2

Has a density of 5 or higher

Question 3

Aerobic

Answer 3

Refers to processes that require or contains oxygen

Question 4

Leachate

Answer 4

Liquid that contains dissolved substances from the soil

Question 5

Ozone

Answer 5

Odourless, colourless gas that contains three oxygen atoms

Question 6

Toxins

Answer 6

Poisonous substance

Question 7

Photolysis

Answer 7

Breakdown of substances using sunlight

Question 8

Greenhouse gases

Answer 8

Atmospheric gases that trap heat

Question 9

Biomagnification

Answer 9

The increase in concentration of a chemical as it moves up the food chain

Question 10

LD50

Answer 10

Lethal dose 50

The amount of a substance to kill 50% of a species

Question 11

Dispersion

Answer 11

Carrying away of a substance by water or air

Question 12

Ppm

Answer 12

Parts per million

The measurement used to describe a very small concentration of a chemical

Question 13

Phytoremediation

Answer 13

Breakdown of a substance by plants

Question 14

Global warming

Answer 14

Increased worldwide temperature

Question 15

Dilution

Answer 15

Mixing of a substance with water or air

Question 16

Permeable

Answer 16

Description of a substance that contains connected pores