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Energy Flow & Property Changes

Total questions: 15

Worksheet time: 12mins

Name
Class
Date
1.
All living things are made of _______, and all living things need _______. 
a)
matter, plants
b)
energy, matter
c)
matter, energy
2.
Oxygen is released into the air by
a)
The sun
b)
Animals
c)
Volcanoes
d)
Plants
3.
Which of these best explains why predators need plants, such as grass, in their ecosystem?
a)
Plants are a large part of their diets
b)
Plants provide safety for predators
c)
Plants break down the organisms that the predators eat
d)
Plants provide food for their animals that the predators eat
4.
What is indicated by the diagram?
a)
Food web
b)
Food chain
c)
Food map
d)
Food menu
5.
In the food chain, which of the pictures is a PRODUCER?
a)
Sun
b)
Plants
c)
Ladybug
d)
Chicken
6.

Which animal is the top predator?

a)

hawk

b)

lizard

c)

snake

d)

grass

7.

How much energy is transferred from one trophic level to the next in an energy pyramid?

a)

1%

b)

10%

c)

100%

d)

90%

8.

Which of the following is an example of a physical change?

a)

Water freezing into ice.

b)

A piece of wood burning.

c)

A toy car rusting.

d)

Zinc producing hydrogen gas when mixed with water.

9.

What type of change has occurred when a nail rusts?

a)

A physical change

b)

A chemical change

c)

An atomic change

d)

A reactive change

10.

What is an example of a chemical change that happens inside your body?

a)

Food being broken down by enzymes in your stomach

b)

Food being broken into small pieces by your teeth

c)

Food being moved from your esophagus into your stomach

d)

Water being absorbed inside your large intestine

11.

What is an example of a physical change that happens inside your body?

a)

Food being broken down by enzymes in your stomach

b)

Food being broken into small pieces by your teeth

c)

Food being moved from your esophagus into your stomach

d)

Water being absorbed inside your large intestine

12.
The arrows in a food chain or web represent ...
a)
They point to the organism that is being eaten.
b)
It shows how sunlight flows within an ecosystem.
c)
They show the direction the energy is flowing between organisms. 
d)
They represent how water is transferred within a habitat.
13.
An animal that is hunted and eaten for food is the  __________.
a)
predator
b)
prey
c)
population
14.
Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?
a)
There would be a decrease in the small bird population.
b)
There would be a decrease in the grass/flowers population.
c)
There would be a decrease in the mice population.
d)
There would be an increase in the grass/flowers population.
15.
Which of the following best describes the small bird in the food web above?
a)
primary and secondary consumer
b)
secondary and tertiary consumer
c)
primary consumer only
d)
secondary consumer only