Food Chains
Food Webs
Dichotomous Key
Changing Ecosystems
100

Is grass a producer or consumer?

Producer

100

What do the mice eat? 


Grains

100

When using a dichotomous key always start at the:

a. Top

b. Middle

c. Side

a. Top

100

If there is less food for an organism to eat then will its numbers increase or decrease?

Decrease

200

Is a shark a producer or consumer?

Consumer

200

True/False: Nothing eats a fox.



True

200

Identify the mini-beast with legs, no wings and eight or more legs.



Spider

200

If there are less predators for an organism will its numbers increase or decrease?

Increase

300

Mushrooms, bacteria and fungus are examples of d__c___p___s .

decomposers

300

What are the two things an owl eats?



Mice & Grasshopper

300

Using the dichotomous key, what is the difference between a moth and butterfly?

Moth is active at night but a butterfly is not.

300

Predict what might happen if the carrots become extinct.




The rabbit numbers will decrease because they will have less food to eat.

400

How does a consumer get its energy?

From eating (consuming) things

400

Finish the food chain:

Carrot -> _______ -> Fox



Rabbit

400

Use the dichotomous key to describe a centipede.


The centipede has got legs, no wings and more than eight legs.

400

Predict what would happen if the owls and foxes became extinct.



If the foxes and owls became extinct then the number of rabbits, mice, grasshoppers and birds would increase because they have no predators. This might mean after a while though that the amount of grass, carrots and grains decrease in number.

500

How does a producer get its energy?

It creates its own energy from sun light.

500

Finish this food web.

________ -> Bird -> Fox


Grains

500

Identify the mini-beast with no legs and a shell.


Snail

500

An invasive vine that covers the ground is introduced to the ecosystem. The vine only lets the small grasshoppers eat the grass because the larger animals can't reach it. Predict what you think will happen to the ecosystem.


If the rabbits can't reach the grass then they will start to die off as they have less food. The grasshoppers will also increase in number because they have more food since they don't have to compete with anything else for it.

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