Unit 1 : Energy - grade 5

1
Light transmits in......... lines.
2
The green glass bottle.......... when white light falls on it.
3
All the following are non-magnetic materials except............
4
A huge instrument contains electromagnet and is used to lift scrap cars.
5
.......... Is not a source of light as it reflects the sunlight.
6
All the following coloured lights are primary lights except...........
7
When a magnet is suspended freely, its north pole is directed towards......... direction.
8
........... discovers that "by moving a magnet in a coil, electric energy is generated".
9
If you put an object at a distance of 20 cm. in front of the mirror, the distance between the image and the mirror equals...........
10
Which of the primary colours are mixed to produce yellow colour ?...........
11
The North Pole.......... with the North Pole
12
The south Pole.......... with the North Pole
13
A rainbow is formed when...........
14
When sunlight strikes a blue transparent glass sheet, the sheet appears...........
15
The compass contains........... magnet.
16
It converts the mechanical (kinetic) energy into electric energy.
17
All the following are examples of semi-transparent materials except..........
18
Transparent and translucent objects have the same colour of...........
19
The natural magnet is one of the............ ores.
20
The coil of a dynamo is made up of........ Wire
21
The second spectrum colour is..........
22
Mixing.......... lights produces magenta light.
23
The magnet is surrounded by an area called...........
24
The............ pole of the magnet always refers to the south direction of the Earth.
25
A device used to detect the magnetic effect of the electric current.
26
The materials which let all light pass through are called........... materials.
27
The flewer seems red, because it absorbs..........
28
The............ pole of the magnet always refers to the north direction of the Earth.
29
The huge electric generator is used to..........
30
Mixing the seven light spectrum colours gives the........... Light
31
When you look at a red apple from a yellow glass sheet, the apple seems............
32
The region(s) of the magnet at which the magnetic force increases is (are) the.......... of the magnet.
33
Electromagnet changes the.........
34
A structure made of a copper wire twisted around a wrought iron bar and the wire is connected to a battery.
35
Formation of shadow when light falls on an object is due to...........
36
............ reflects all light colours.
37
The natural magnet is a.......... rock
38
Dynamo changes the.........
39
We can see objects due to...........
40
......... are coloured lights which impossible to be produced by mixing two of the other coloured lights.
41
........... is attracted to the magnet.
42
........... consists of a copper coil and a magnet.

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