Download Model Answers Final revision sheet A

Egyptian Language School
Science Department
Second Term
3rd primary --------
Name: ------------------Date: ----/ ---- / ----
Model Answers Final revision sheet
A- Give scientific term:
1. Good conductors of electricity
2. Universe
3. Heat energy
4. Good conductors of heat
5. Electric energy
6. Solar cell
7. Galaxy
8. Insulators
9. Bad conductors of heat
10.Solar system
11.Solar energy
12.Comets
13.Wind mill
14.Asteroids
15.Moon
16.Uranus
B- Complete the following:
1. Heat transfer
2. Solar
3. Galaxies
4. Sun
5. Sun , 8 planets, comets and asteroids
6. Neptune
7. Electricity
8. Heat
9. Energy
10.Kinetic
11.Main or dry cells
12.Closed
13.Wood, aluminum
14.Wood, plastic, iron
15.Switch
16.Longer
17.Mars
18.Medium
19.Mercury
20.Sun, fire, friction
C-Give reason:
1-Electric wires are covered by plastic because it is an insulator (can’t pass electricity).
2-The year of Jupiter has more days than the year of earth because it is further than the earth
from the sun/ Jupiter has bigger orbit than Earth.
3-Cooking pots are made of aluminum while their handles are made of wood because
aluminum is a good conductor of heat while wood is a bad conductor of heat.
4-When I put a cube of ice in my hands it melts because heat transfers from my hand to the ice
cube.
5-When I turn off the switch of the lamp it stops working because the electric circuit will be
opened.
6-Wires should be made of metals because metals are conductors of electricity which pass
electricity to pass through them.
7-If we do not eat we will not be able to work because food gives us energy to work.
D-Put true ( ) or false (  ):
1. False
2. False
3. False
4. False
5. False
6. True
7. True
8. True
9. False
10.True
11.True
12.False
13.True
E-What is the difference between these 2 electric circuits writing all the
labels on each one
Labels : lamp, wire, switch, battery
The first is a closed circuit so the lamp will light.
The second is an opened circuit so the lamp won’t light.