Agriculture
Oceans and fisheries
Natural hazards
water and its management
100

An animal that attacks or feeds on a plant

Pest

100

The legal limit on the  amount of fish that can be caught

quota

100

where two or more plates meet

Plate boundary

100

the movement of water up plants and its subsequent loss as water from their leaves

Transpiration

200

Growing plants without soil, with the nutrients the plant needs dissolved in water, this technique is often used in conjuntion with a growing blueprint

Hydroponics

200

The clodes end of a fishing net

Cod end

200

A large wave created by ocean floor displacement or landslides

Tsunami

200

Derived from living organism

organic

300

The ability of living organism to survive when exposed to a toxic chemical

Resistance

300

Animals caught by fishers that are not the intended target of their fishing effort

Bycatch

300

A piece of  lithosphere that moves slowly on the asthenosphere

tectonic plate

300

An organism that carries a disease-producing organism, such as the mosquito

vector

400

A sequence events starting with enrichment of water by mineral nutrients or organic matter that leads to a reduction in osygen levels in the water and the death of fish and other animals

Eutrophication

400

When the number of fish that is caught is greater than the rate at wich the fish reproduce leading to a fall in fish numbers in an area

Overfishing

400

The point on the Earth's surface directly above the focus of an earthquake

Epicenter

400

The purification of water by pumping it at high pressure through a fine membrane

Reverse osmosis

500

The artificial development of flat areas in a sloping terrain

Terracing

500

Small organism in the sea that can make their own food and upon with almost other sea creatures depend for teir food

Phytoplankton

500

The layer of the Earth below the lithosphere, it is hotter and weaker than the lithosphere above and is capable of plastic flow.

Asthenosphere

500

the removal of salt from water

Desalination