by Danny Asmara

Wall 21 to 25

dannyasmara — 2014-08-20 00:12:23 UTC

Q25 Seann and Dillon

2014-08-20 01:21:19 UTC

Ans:2

The sun's light is absorbed by the solar panel

and it is converted into electrical energy and converted into light and heat energy.

Q25 Aarifeen and Tyng hwee

2014-08-20 01:25:11 UTC

Ans : 2

(1) cannot cause b is still at solid state when at 9

(3) cannot cause a gas at 35

(4) cannot cause a and b gas at 68.

(2) is the answer as a,b and c freezing point is lesser than 12

and their boiling point is more than 12!

Q24 Dillon and Seann

2014-08-20 01:26:42 UTC

Ans:4

All living things grow and reproduce

Q22 Akmal and Moe Htet

2014-08-20 01:27:46 UTC

Ans:4

Explaination

1) If she wanted to find out whether the plank was too hard to move,

she should have use different type of plank and repeat.

2)Use different weight .

3) She should use different surfaces.

Q21 ~ Megan & YueMei n_n

2014-08-20 01:33:44 UTC

Ans : 3 Saw dust increases friction. Rollers, Oil and Ball bearings help to reduce friction.

Q21 by Lucas lee and fyy

2014-08-20 01:34:11 UTC

ans:3

the oil is a lubricant and it can reduces friction between surfaces

ball bearing and roller have balls that reduce the surface contact area

Q25 Akmal and Moe Htet

2014-08-20 01:35:14 UTC

Ans:2

Light energy from the sun is absorbed by the solar lamp

then converted to electrical energy then use to power the lamp then

is converted to light and heat energy.

Q24 -Megan & Yuemei :)

2014-08-20 01:42:24 UTC

Ans- 4 The cells need to grow to reproduce and that explains why there is more cells at the end of the experiment than the start.

Q23 Done by Mahirah & Nadzirah

2014-08-20 01:48:41 UTC

Ans:2

The boiling point is 30 for A but 35 is higher than 30 so it is not the ans.The freezing point is lower than 10 so 9 is not the ans. 68 is not the ans as it is too high