4th E – Learning Class                      Test

Basic Science

Topic : Air

Air is a colourless, odourless and tasteless mixture of gases ( oxygen and nitrogen).

Air has weight, it occupies space and it is present every where.

What is pressure? Pressure is define as the force exerted over a unit surface area. This means that air pressure is the force exerted by air by per unit area.

Set Work.

1. Air is present inside

the water (Yes / No)

Give reason why air

is present inside the

water.

2. _______ pressure is

the force exerted by

air.

Assignment

1. Write the two gases

that are present in

air.

2. Give two reasons

why air has weight

4th E – Learning Class

Test

1. What are factors of

numbers?

2. Prime numbers are the

numbers that have

two factors only

number one (1) and

the given number

itself. (True/False)

3. Wages can be paid

daily, weekly and

hourly

4. Unemployment can

lead to prostitution,

taking of hard drugs

and _____________

5. What is technology?

6. Write out three

examples of energy

7. Potential energy is the

energy at rest

( Yes / No)

. Write the plural and

singular of the

following pronoun

Plural. Singular

8. Me. ________

9. _____. Ours

10. I. ______