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Science final test!

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

which of the following lives in a prarie ecosystem?

a)

mushroom

b)

grass

c)

oak tree

d)

woodpecker

2.

which of the following is a biotic factor?

a)

sunlight

b)

bacteria

c)

temperature

d)

water

3.

which of the following lists the levels of an ecosystem in order from largest to smallest?

a)

population,organisim,community,ecosystem

b)

ecosystem,community,organisim,population

c)

organisim,community,population,ecosystem

d)

ecosystem,community,population,organisim

4.

True or false all memebrs of one community living in a particular area make up a population

a)

True-community

b)

False-speces

5.

True or false oxygen is an abiotic factor in the enviorment that is important for plants to make thier own food.

a)

True-oxygen

b)

False-sunlight

6.

True or false three coyotes per square kilometer is an example of population density

a)

True

b)

False

7.

True or false if foxes arrive in an area and catch and eat a large number of rabbits,the foxes are causing an increase in the Birth rate of the rabbit population

a)

True-birth rate

b)

False-death rate

8.

if an area has all the wolves that it can support,the wolf population has reached its what?

a)

carrying capacity

b)

population density

c)

death rate

d)

birth rate

9.

What are the two main kinds of interactions amoung organisims are what?

a)

competition and adaption

b)

competition and predation

10.

An increase in a predator population will likely result in a what in the prey population

a)

Decrease

b)

Increase

11.

True or false dwarf mistletoe is a plant that grows into the bark of a tree to obtain water and nutrients the mistltoes is a parasite

a)

true

b)

false

12.

an example of an adaption that helps a prey species avoid beig caught is what?

a)

claws

b)

sharp teeth

c)

mimicry

d)

posiounus stingers

13.

a relationship in which two species live closely together and both benifit is what?

a)

predation

b)

mutalisim

c)

parasitism

d)

commensalism

14.

What organisims are usually the pioneer species in a new area?how do these organisims prepare the are for other species

a)

mosses and lichens are pioneer species and they break down rocks to form soil

b)

mosses and fungi are pioneer species and they break down rocks to form soil.

15.

an old house was torn down.small weeds and grasses grew in the vacant lot.over the next years,bushes and tree seedlings began to grow.

a)

primary succession

b)

secondary succession

16.

The major cause of extinction is what

a)

habitat fragmentation

b)

habitat destruction

17.

protecting whole ecosystems is the most effective way to preserve biodiversity

a)

true

b)

false

18.

A sea otter is a what that influences the survival of many other species in its ecosystem

a)

keystone species

b)

pioneer species

19.

what are the most diverse ecosystems in the world

a)

tropical rainforests

b)

coral reefs

c)

ocean

20.

scientists think ppl have directly caused the extinction of some species through habitat destruction,BLANK,or other actions

a)

pollution,poaching

b)

pollution

c)

poaching,threating species