Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

1. a) Define the following;

i) Mass - Mass is the quantity of a contains.

ii)Weight - Weight is the exerted by a body on its support in a
gravitational field.

iii) Density - Density is the per unit .

b) A cuboid of (5 cm by 10 cm) has a mass of 20 kg. If the density of the cuboid is 8.0 x 104 kgm-3 find the height of the cuboid.


V = M/D

V = 20 kg/ 8.0 x 104 kgm-3

V = X 10-4
(Use decimals)
But the volume of a cuboid = L x W x H

0.05 x 0.1 x H = 2.5 x 10-4.
H= m(Use decimals)
The height of the cuboid is cm.

2. Write the following in scientific form

i) m = 0.002m = x 10-m

ii) m = 0.004m = x 10-m
iii) m = 0.001m = x 10-m
iv) 2007 kg = 2.007kg x 10-kg
v) 0.0035 m = 3.5 x 10-m

3. Convert the following as required.
i) 0.0025 m to cm
1m = 100cm
0.0025m = ( 0.0025x)cm
= cm.(In decimal form)

ii) 250 g to Kg
= kg.(In decimal)

iii) 2 kgm-3 to gcm-3

= (2 x 1000)/1000000
= x 10-gm-

4.(a) i) Define the term Force
- Force is anything that causes a in the body’s of rest or
uniform in a straight .

Complete the words in (ii) and (iii) below
ii) List at least 5 forces

- F force.
- M force.
- G force.
- Electro- force.
- C force

iii) Give at least 3 effects of force.

· It can change the sp of a body.
· It can change the di of the body.
· It can change the sh of the body

( b) A spring of length 10 cm stretches to 15 cm when a load of 20 N is suspended from it. What will be its length when a force of 40 N is suspended?

20N = k x 5cm.

k = N cm

When F = 40N

40N = x e.

e= cm

New length = 10cm + cm
= cm.