ILLUSTRATIONS OF MODELS

DONE BY: IMAN ALI LIAQAT

CLASS: 8G2

SUBJECT TEACHER: MS. BINU

1)

2)

3)

4) To make sugar crystals, sugar and hot water are stirred together to form a solution. By varying the amount of sugar,

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.

the solution may become saturated or supersaturated. As the solution cools, crystals may form.

5) (i)

(ii) PowerPoint Presentation (Filename: Q5 (ii))

6) a.

b.

Standard Color

1

2

3

Solution

Density = Mass/Volume Weight = Mass/Gravity

L1-L2 = Volume of irregular solid

Weight of grains: 5-5.7= 0.7

w = mg

Grains of sandEmpty

7) (i)

(ii) ??

8) ??

9) (check)

10)

11) (i)

By adding salt, the boiling point of water increases.

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.

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.

13) Periscope 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.