موضوع: Revision for primary 5 الثلاثاء يناير 26, 2010 5:37 pm
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