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1. 
What are the elements that made an ecosystem?
A.
living things
B.
physical environment
C.
water sun and soil
D.
only animals and plants
2. 
There are different interactions in a ecosystem: Depredation means?
A.
It occurs between two animals that compte for the samen resource.
B.
If one animal captures another for food.
C.
It is stablished between two species to benefit each other.
3. 
Choose an example of cooperation interaction?
A.
A lion eats a zebra for food.
B.
A bee helps a flower to pollinate.
C.
Two male moose fight for a female
4. 
What is the physical environment made specifically by water?
A.
aerial
B.
terrestrial
C.
aquatic
5. 
Animals like horses, lions and elephants belong to?
A.
terrestrial ecosystem
B.
aerial ecosystem
C.
aquatic ecosystem
6. 
What is the difference between a food chain and a food web?
A.
A food web is similar to a food chain but with different animals.
B.
A food chain is bigger than a food web.
C.
A food chain is linear and a food web is made by different food chains.
7. 
What are examples of consumers in a food chain? Choose 2
A.
plants
B.
bacterias and fungi
C.
herbivores and carnivores
8. 
Plants have specific parts, what is the main function of flowers?
A.
The flower allow plants to breathe.
B.
The flower allos the plant to reproduce.
C.
The flower allows the support of the plants.
9. 
What is the part of the plant that make photosynthesis and breathing?
A.
steam and its conducnting vessels
B.
flowers and fruits
C.
roots
D.
leaves
10. 
The cell of the plant has two specific organelles which are?
A.
cell wall
B.
nucleus
C.
cytoplasm
D.
chloroplasts
11. 
Why is important the photosynthesis in plants?
A.
Because they make their own food.
B.
Because the can breath oxygen
C.
Because they can be green
12. 
What is the main characteristics fo grasslands.
A.
Grasslands are full of trees and vegetation.
B.
It is full of herbaceous plants and small animals
C.
It is a green space where herbivores live.
13. 
The ecosystem where terrestrial and aquatic ecosystem mixed with each other.
A.
ponds and lakes
B.
litoral areas
C.
forests
D.
urban spaces
14. 
Urban spaces are modify mainly by?
A.
humans and population
B.
animals and plants
C.
constructions and factories
15. 
What is pollution?
A.
It is the loss of the forests.
B.
It occurs when humans harvest more animals or plants.
C.
It is the accumulation of harmful substances in air, water or soil.
16. 
What is the best definition for natural disasters?
A.
They are caused by the effects of humans pollution.
B.
They occur due to natural pehnomena.
C.
They are caused as consequence of global warming.