Year 7 Review - U.1

Ecosystems are composed of:

• Biotic factors only, like animals and plants.

• Abiotic factors only, like rocks and sunlight.

• Biotic and abiotic factors, like animals and plants for biotic and sunlight for abiotic.

• Biotic and abiotic factors, like animals and plants for abiotic and sunlight for biotic.

Abiotic factors:

• Don't mater much, they do not interfere in the ecosystem.

• They change the ecosystem in many ways, but not the relationship between species.

• They change the ecosystem and the relationship between species.

• They are not part of ecosystem.

Biotic factors:

• Are divided in: producers, consumers and decomposers.

• Are not divided.

• Are divided in: first community, succession community and climax community.

• Are divided in: producers and consumers.

In the picture you see the water cycle. The water cycle:

• Is part of the abiotic factors of the ecosystem and it is not important.

• Is part of the biotic factors of the ecosystem and it is not important.

• Is part of the abiotic factors of the ecosystem and it is important.

• Is part of the biotic factors of the ecosystem and it is important.

The __________ is very important because it _________ and determine some important factors for __________.

• Carbon cycle/ is part of the biotic factors/ natural selection

• Carbon cycle/ is part of the climate/ natural selection

• Water cycle/ is part of the biotic factors/ natural selection

• Water cycle/ is part of the climate/ natural selection

First communities are:

• The first producers to colonize a region.

• The first biotic factors to colonize a region.

• The beginning of a region.

Consumers can be:

• Only animals. Bacteria and fungi are producers.

• First class, second class and special class

• Biotic and abiotic

• Omnivores, carnivores and herbivores.

After lots and lots of successions in a region an _________ is formed. _________ are composed of __________, _____________ and _________.

• Ecosystem/ ecosystems/ vegetation/ climate and geological formation/ specific fauna.

• Ecosystem/ climax communities/ animals/ climate and geological formation/ specific flora.

• Climax community/ ecosystems/ rocks/ climate and geological formation/ specific fauna

• Ecosystem/ ecosystems/ vegetation/ climate and geological formation/ specific flora.

The carbon cycle:

• Is just like the matter flow, is always returning, like a wheel.

• Is just like the matter flow, goes In one direction.

• Is just like the energy flow, goes In one direction.

• Is just like the energy flow, is always returning, like a wheel.

Photosynthesis and respiration are basically the same equation, but reverse from one to another.

• True.

• False.