Exercise 1

SECTION  A

Choose the best answer from the options A,B,C or D.

1.      Microorganisms cause food decay. Such microorganisms are

I  fungi                                                III  bacteria

II yeast                                                IV  protozoa

A. I and  III                                        C. III and IV

B. II and III                                        D. I , II and III

2.      Which of the objects below uses the principle of light reflection?

A.    Glass window                                           C. Bulb

B.     Spectacles                                                 D. Mirror

3.      Which of the statements below concerning energy is true ?

A.    Some living things do not need energy.

B.     Non-living things are not alive and so do not need energy to operate.

C.     The sun is the main source of energy for all living things on Earth.

D.    An object that produces energy is called renewable energy.

4.       Which group of microorganisms are the smallest in size ?

A.    Viruses                                                      C. Fungi

B.     Bacteria                                                     D. Protozoa

5.       Which statements about bacteria are true ?

I.                   All bacteria are harmful

II.                They can reproduce

III.             They can move

IV.             They breathe

A.    I and II                                                      C. II , III and IV

B.     III and IV                                                  D. I, II, III and IV

6.       Chickenpox, measles and mumps are caused by viruses. They can be prevented through  __________________ .

A.    antibiotics                                      C. medications

B.     antiseptics                                     D. vaccination

·         It is brightly coloured. ·         It has fragrant and juicy flesh. ·         Its fruit tastes sweet.

7.         The above characteristics help the fruit to be dispersed by _______.

A.    wind                                                          C. animals

B.     water                                                         D. an explosive mechanism

Plant          worm          chicken          python

8.     Which organism has the largest population ?

A.    The plant                                                   C. The chicken

B.     The worm                                                  D. The python

9.      What do living things need to carry out their life processes and daily activities ?

A.    Food                                                          C. Energy

B.     Water                                                        D. Machines

10.  Which statement about energy is not true ?

A.    Solar energy is released by the sun.

B.     Chemical energy is stored in the food we eat.

C.     Potential energy is stored in fossil fuels.

D.    All moving objects have kinetic energy.

11.  What forms of energy does burning firewood release ?

I.                   Heat energy

II.                Light energy

III.             Solar energy

IV.             Electrical energy

A.    I and II                                                C. I, II and IV

B.     III and IV                                           D. I, II, II and IV                                                            

12.  What type of surface makes the best reflector of light ?

A.    A rough and dark surface

B.     A smooth and dark surface

C.     A flat and smooth surface

D.    A rough and uneven surface

13.  Which object is a good reflector of light ?

A.    A red cardboard                                        C. A woolen carpet

B.     A silver tray                                               D. A cotton shirt

14.  Which of the following actions can increase the size of an inflated balloon ?

A.    Squeeze it with both hands

B.     Keep it in a refrigerator

C.     Pour cold water over it

D.    Put it under the sun.

15.  Which animals has the same method of self-protection as the zebra ?

A.    Tiger                                                          C. Rhinoceros

B.     Chameleon                                                D. Pangolin

                                                                                        

                         

EXERCISE  2

       A)  Fill in the blanks with the correct answer

protect

butterfly

move

light

energy

Panda

a)      Some microorganism can _____________ on their own.

b)      The parents _____________ their young from danger.

c)      _____________ lays eggs on the undersides of leaves.

d)     _____________ is the ability to do work.

e)      We need ______________ to see things around us.

f)       _____________ eat only bamboo shoots and leaves.