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What are the main factors that affect aquatic ecosystems? write them.
Sunlight, temperature and salt.
A river is ................ ecosystem.
flowing water
A lake is ................ ecosystem.
still water
.................. areas have a lot of light.
Coast
................... is deep and light only reaches the surface.
Open sea
What are the main factors that affect terrestrial ecosystems? Write them.
Temperature, humidity, relief and soil
What happen if one of the factors in an ecosystem change?
If a factor change the ecosystem will also change.
Which factor can cause a fire?
The temperature
What is biodiversity?
It is the variety of living things on Earth.
Name the two ecosystems with the greatest biodiversity.
Rainforests and coral reefs
Biodiversity has many benefits for people. Name the benefits.
Provides raw material, food and energy; helps to regulate humidity and keep water clean and is a source of fun and enjoyment.
There is a loss of biodiversity when a species of living things disappears. What is this called?
Extinction
What are the main causes of extinction?
Destruction, pollution and hunting or overfishing
How can governments and autonomous communities protect ecosystems?
Collecting waste for recycling, preventing and fighting forest fires, approving and supervising works than affect ecosystems, creating protective areas...
What four things can you do to protect ecosystems? Write them
To protect ecosystems I can save water, save energy, recycle waste and respect nature.
The sunlight increases as the depth increases. True or False
False
