Water chapter 4

___________ are caused by exceptionally heavy rainfall over a short period of time.

• floods

• droughts

• flash floods

• thunderstorm

__________ are long period of little or no rainfall in a specific area.

• heatwave

• floods

• thunderstorms

• droughts

___________ refers to the community of plants and animals found in rivers that interact with one another.

• cells

• ecosystems

• biome

• life cycle

___________ obtain energy from sunlight through photosynthesis and release oxygen into the water.

• photoplankton

• phytoplankton

• fishplankton

• fotoplankton

people use water for _______________.

• agriculture

• recreation

• domestic

• all the above

Excess ______________________ from farms that get washed into rivers by rain provide nutrients for algae to grow rapidly.

• chemicals

• fertilisers

• toxic

• poison