reason:the heat from the hotwater heats up the air inside the flask causing it to expand and pushng it out

the dried leaaf in pot b acts as an fertiliser and provide nutrients to boost the plant growth and it grow taller than plant in a

The tube acts as a windpipe and the bell jar acts as the ribcage , the balloons acts as the lungs . The rest of the answers are all rubbish because the balloon cannot increase in volume if it is the ribcage.

The only variable that should change in this experiment should be the type of soil , the size of pot is changed and it makes the experiment unfair. The amount of soil will be affected by the size of the pots hence the answer should be 2.

Dull colors absorbs heat faster than bright colors. As B is cloth color is dull and black.

Therefore, the answer is

(1) cannot be as the mass of ice cube left was not the least.

(3) cannot be as the mass of ice cube left was not the least.

(4) cannot be as the mass of ice cube left was not the least.

(2) The mass of ice cube left was was the least so it absorbed

the most amount of heat

He wanted to find out which soil was suitable for growing rose plant so the

amount of soil cannot be different

The heat from the hot water heats up the flask causing the air in side the flask to expand causing the ink to rise to the top

Reason: Dried leaves can decompose and provide nutrients for the plant.

The bell jar is as hard as the ribcage, The tube represents the windpipe as air

can flow through the tube.

The balloon presents the lung as when we inhale, the lungs will become bigger, and

the balloon can be expanded, same to the exhale.

The amount of soil used are diffrent