u6_test

unit 6

Test Name

Class

1 Identify the six simple machines. a

b

c

e

f 

pulley  d

5

2 Complete the text about forces. A (a) f orce 

 is a push or a (b) p

that acts on an object.

We can’t can’t see forces, but we can see their (c) e

. Forces can make

an object (d) m

, slow down or

, change (e) d

(f) a

. They can also make an object change

(g) s

. Forces can differ in (h) s

and direction.

7

3 Look and answer the questions. 1

2

(a) Which forces forces are acting on the ball in pictures 1 and 2? Picture 1:

.

Picture 2:

.

(b) Which force is the same one that keeps artificial satellites in orbit around the Earth?

(c) Which force force acts in the opposite direction to the direction of movement?

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4 Write sentences about these machines and energy.

(a)

a

b

c

d

This machine needs energy from the wind to work.

(b) (c) (d)

3

5 Complet Complete e the table about machines and their functions. Function (a)

mechanical 

Example (b)

(c)

(d)

(e)

(f)

heater  4

6 Complet Complete e the definitions. (a) The

casing   is the outer part of the machine.

(b) The the machine.

are the individual components of

(c) A is a group of components which work together to perform a specific function. (d) An or a motor is the part of the machine which produces movement.

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7 Answer the question. What’ss the difference between an engine and a motor? What’

2

8 Complete the sentences about gears. (a) Gears are wheels with  teeth . (b) Gears can change the

and the speed.

(c) Gears can change the amount of

needed.

(d) Gears transfer

from one place to another another..

3

9 Complete to make true sentences about how we use technology. (a) At school we use technology technology to

use interactive whiteboards  .

and to (b) In the home we can use technology to

.

and to (c) Modern medicine uses technology to .

and to

5

10 Circle true or false. Correct the sentences that are false. (a) Many kinds of microscopes, microscopes, cameras and telescopes use computers.

True / False

(b) The first computers were very small and quick.

True / False

(c) Today all communic communication ation travels throug through h wires.

True / False

(d) A microchip allows a computer to process information informat ion quick quickly. ly.

True / False

(e) A GPS needs six satellites to work.

True / False

4 TEST TOTAL

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