Q.1: Complete the following:
1- ----------- is a form of energy that can be seen.
2-the moon’s surface ----------- the sun light.
3-light travels in a ---------- lines.
4-the idea of the photographic camera depends on ---------------------------------------------------------
5-the nearer the object to light source is the ------------- the shadow of this object.
6-the kind of material that covers windows of darkened photographic room is ----------------
7-There are two types of reflection: ------------- and ----------- reflection.
8-the light energy that can be seen is called ---------------
9-Secondary colors are produced as a result of ------------------------------
10-the opaque colored objects seems having the same color of light which ------------------
11-When you hold a magnet freely, one of its poles is directed to ------------ and the other to ---------------
12- The magnetic force of the electromagnet can be increased by:
----------------------------- and --------------------------
13-the scientist who discovered the idea of dynamo working is called ----------
14-Mixtures are formed by -------------------, --------------------- or --------------------
15-Gold alloys are composed of ---------------, -------------- and ---------------
16- --------------- is a common solvent for most substances.
17-Increasing stirring ----------------- the time of solubility process.
18-Food relationships among living organisms are ----------------, -------------------, ------------------------ and -----------------------
19-Ways of self-defense against predation are --------------------
and ----------------------
20-Examples of saprophytes: --------------------, --------------------and------------------
21-The parasitism is a relationship between ------------------and -----------------
الثائر الحق2012-07-25, 5:22 pm