How do i do this science homework? i don't c anything wrong with the experiments : (

Jeremiah didn't use the same amount of water.
He could improve it by using the same amount of water.

The two didn't put them at the same time.
The two can put the candy in their mouth at the same time.

 

Since 2 and 3 were already answered I'm gonna answer 4.
Demetrius didn't use balls of equal weight.
He should use balls of equal weights.

Standing in the sunlight and feeling the heat on your face (uv radiation is entering the skin, converting to infrared radiation, and is absorbed by your tissues)orstanding near a fire and feeling the heat on your skin (infrared radiation transfer)