The continuous movement of water on, above and below the surface of the Earth called:

• Tidal energy

• Maturation

• Geothermal

• Water cycle

The increase of Earth’s average surface temperature due to effect of greenhouse gases which trap heat that would otherwise escape from Earth called:

• Greenhouse effect

• Eutrophication

• Global warming

• Aeration

The variety of life called:

• Biosphere

• Biodiversity

• Ecosystem

• Biota

Place on Earth’s surface where life dwells called:

• Biosphere

• Ecosystem

• Biodiversity

• Wetland

A resource which is naturally replenished on a human timescale called:

• Non-renewable resources

• Renewable resources

• Pathogens

• Aeration

An organism anatomically and physiologically adapted to eating plant material for the main component of its diet called:

• Carnivore

• Producers

• Consumers

• Herbivore

The energy produced by the surge of ocean waters during the rise and fall of tides called:

• Geothermal energy

• Wind energy

• Tidal energy

• Solar energy

One type of nutrient pollution that stimulates an explosive growth of algae that depletes the water of oxygen when the algae die and are eaten by bacteria called:

• Fertilizer

• Pesticide

• Contaminant

• Eutrophication

Organisms of an ecological food chain which receive energy by eating other organisms called:

• Producers

• Consumers

• Carnivore

• Herbivore

Any of a large number of natural and synthetic materials spread on or worked into soil to increase its capacity to support plant growth called:

• Pesticide

• Pollutant

• Aeration

• Fertilizer