SCIENCE WORKSHEETS

WORKSHEET (1):

Food Web

A food web shows how energy is passed on from one living thing to the next. It shows the feeding habits of different animals that live together in an ecosystem. In the food web pictured on the left,
energy is passed from the grass to the mouse to the snake to the hawk.
Producers are living things that make their own food with sun and air. The producers are pictured at the bottom of the food web.
Consumers are living things that eat other living things. 
Use the food web in the picture above to answer the questions.
        1.     Name the living things in the food web that are producers.

(                            ),(                            )

2.     Name the living things in the food web that are consumers.

(                           ),(                             )
(                           ),(                             )
3.     Which living things does the snake eat?

(                            ),(                             )
4.     Which living things does the hawk eat?
(                           ),(                             ),(                               )

5.     What is eaten by the rabbit?
(                            ),(                             )


Answers:
1.     grass and wildflowers
2.     rabbit, mouse,snake, and hawk
3.     rabbit and mouse
4.     rabbit, mouse and snake
5.     grass and Wildflowers
 
WORKSHEET(2) : Producers and Consumers
A producer is a living thing that makes its own food from sunlight, air, and soil. Green plants are producers who make food in their leaves.
A consumer is a living thing that cannot make its own food. Consumers get their energy by eating food. All animals are consumers.
A decomposer is a living thing that gets energy by breaking down dead plants and animals. Fungi and bacteria are the most common decomposers.
Tell whether each living thing below is a producer, consumer, or decomposer.

a. apple tree - __________        b. hawk - ____________
c. mushroom -__________        d. carrot-_____________
g. cougar - ____________        h. bacteria - __________
i. daffodil - ____________         j. pigeon - ____________
k. snake - _____________        l. catfish - ____________

ANSWER KEY
a. apple tree – producer             b. hawk - consumer
c. mushroom – decomposer      d. carrot - producer
e. dragonfly - consumer              f. bamboo - producer
g. cougar - consumer                 h. bacteria - decomposer
i. daffodil – producer                   j. pigeon - consumer
k. snake – consumer                   l. catfish - consumer


WORKSHEET(3):Predator and Prey 

A predator is an animal that hunts other animals for food. Prey is an animal that is hunted and eaten for food.

Identify the predator and prey for each scenario below.

1. A snapping turtle in a pond eats a small perch.

predator - _________________ prey - _________________

2. A shrew is eaten by a barn owl.

predator - _________________prey - _________________

3. A seagull lands near an alligator and the alligator eats it.

predator - ________________ prey - __________________

4. A gray wolf hunts and eats a rabbit.

predator - ________________ prey - __________________

5. A blue whale swallows krill.

predator - ________________ prey -________________________




Identify the predator and prey for each scenario below.

1. A snapping turtle in a pond eats a small perch.
predator - snapping turtle prey - perch

2. A shrew is eaten by a barn owl.
predator - barn owl prey - shrew

3. A seagull lands near an alligator and the alligator eats it.
predator - alligator prey - seagull

4. A gray wolf hunts and eats a rabbit.
predator - gray wolf prey - rabbit

5. A blue whale swallows krill.
predator - blue whale prey - krill



WORKSHEET(4)

Match each word with the definition correctly.

1. food chain  =                  
2. food web   =                
3. autotroph  =                 
4. heterotroph =                                     
5. carnivore =         
6. hervivore =     
7. primary consumer =  
8. secondary consumer =  
9. tertiary consumer =    
10. quaternary consumer =    

DEFINITION:


A: The network of all the inter-related food chains in a biological community.

 B: The sequence of who eats whom in a biological community.

 C: An organism that get its energy by eating other organisms.

 D: An organism that makes its food from light or chemical energy without eating.

 E: An organism that eats plants.

 F: An organism that eats meat.

 G: A meat-eater that eats primary consumers.

 H:A meat-eater that eats tertiary consumers.

  I: A meat-eater that eats autotrophs. 

 J: A meat-eater that eats secondary consumer.


WORKSHEET(5): ENERGY

A) Fill in the blanks.

1. Energy is the ability to do__________________.
2. All living things need_________________ to carry out life processes.
3. The ______________ is the main source of energy.
4. Energy from plants is transferred to us through____________.

( Sun     food     work     energy )

B) Answer the questions below.

1. State the various forms of energy.
2. State the transformation of energy in the following activities:
(a) A book is held up to a height and dropped
(b) A torchlight is switched on
(c) A hairdryer is switched on
(d) A stretch rubber band is released

C) State whether the following statements are true or false.

1. Renewable energy sources can be replenished.
2. Fossil fuels and biomass fuels are renewable energy sources.
3. Non-renewable energy sources do not pollute the environment.
4. Renewable energy sources are always available but 
    non-renewable energy sources are limited.

WHERE'S ENERGY???

http://teams.lacoe.edu/documentation/classrooms/judi/forces/activities/energy.html      


ANSWER:

A) 1. Work    2. Energy     3. Sun     4. Food

B) 1. Chemical, heat, potential, sound, solar, kinetic,
         electrical and light energy

     2. (a) Potential energy---kinetic energy---sound energy

         (b) Chemical energy---electrical energy
               ---heat energy---light energy

         (c) Electrical energy---heat energy+ sound energy

         (d) Potential energy---kinetic energy

C ) 1. True     2. False     3. False     4. True



WORKSHEET(6): ELECTRICITY

A). State whether the following statement are true or false.

1. Electric generators in power stations are the only sources of electricity.
2. Dry cells is not a source of electricity.
3. Solar cells convert light energy into electricity.
4. A good car battery can be recharged.
5. Wind cannot be used to generate electricity.

B). Fill in the blanks with the correct words below.

( shock     overload     water     frayed     unplug  )


1. Do not use appliances with _____wires.
2. Damaged insulation on wires can also give you 
    an electric _____if you touch them.
3. Do not _____an electric appliances from the socket when there is a fire.
4. Do not touch switches with wet hands because_____conducts electricity.
5. Connecting too many plugs to one socket will _____the power point.


ANSWER:
A) 1.False  2. False 3.True 4.True 5.False
B) 1.frayed  2. shock   3. unplug  4. water   5. overload

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