This document contains illustrations and explanations of science models done by a student named Iman Ali Liaqat for their class 8G2 subject teacher Ms. Binu. It includes diagrams and explanations of particles in mixtures, how sugar crystals form as a solution cools, density and weight calculations, how boiling point increases with added salt, and diagrams demonstrating how greater pressure is exerted with less surface area as seen in examples of thin tires versus fat tires and sharp edges of forks and knives versus blunt edges.

1. ILLUSTRATIONS OF MODELS
DONE BY: IMAN ALI LIAQAT
CLASS: 8G2
SUBJECT TEACHER: MS. BINU

2. 1)
2)
3)
Solid particles Liquid particles Solid particles
PARTICLES IN MIXTURE
 Particles in a mixture are not
tied together.
 Particles in a mixture can be
mixed in any proportion.

3. 4) To make sugar crystals, sugar and hot water are stirred
together to form a solution. By varying the amount of sugar,
the solution may become saturated or supersaturated. As the
solution cools, crystals may form.
5) (i)
(ii) PowerPoint Presentation (Filename: Q5 (ii))
6)
a.
Standard Color
1
2
3
Solution
Density = Mass/Volume Weight = Mass/Gravity
L1-L2 = Volume of irregular solid

4. b.
7) (i)
(ii) ??
8) ??
9) (check)
10)
Weight of grains: 5-5.7= 0.7
w = mg
Grains of sand
Empty
By adding salt, the boiling point of
water increases.

5. 11) (i)
CONVEX??
(ii) PowerPoint Presentation (Filename: Q11 (ii))
12)
The thin tyre has a less area, so the pressure
exerted would be more.
Whereas, a fat tyre has a greater area, so the pressure
exerted would not be much greater for it.

6. 13) Periscope
The sharp edge of the fork, which is a less area,
would have more pressure on the food.
Whereas the blunt edge of the fork, which is a
greater area, would have less pressure exerted on
the food.
The sharp edge of the knife, which is a less area,
would have more pressure on the food.
Whereas the blunt edge of the knife, which is a
greater area, would have less pressure exerted on
the food.