Revision for primary 5

Give reason [/b:-
1- [b]White light can be separated
Because white light consistes of 7 colors and can be analyzed ito 7 color when pass through a prism

2- Dynamo can change mechanical energy into electric energy
Because the magnet has electric effect

3- The parazite does not kill its host[/u]
Because the parazite will lose its source of food and will die

4- [u]Parazitizmmay be external or internal
Because some parazite live on the hosts body feed on sucking its blood
And otheres live inter the hosts body feed on its digested food

5- some materials are magnetic
Because they are attracted to the magnet such as iron ,nickel and steel

6-Green plants can make their food
Because plants absorb sun light,water and carbon dioxide during photosynthesis process to bproduce sugar and starch (to make thier food)

7-Some mixtures can be separated by using a separating funnel
because the separating funnel is used to separate the heterogeneous liquid mixture as (oil ,water)

8-Predation is a temporary food relationship
Because it is ends up by devouring the pry or a part of it

9-Rain bow can be seen after heavy rain falling
Because sunlight passes through drops of rain water then it splitted into 7 colorsl