Sunlight,Carbon dioxide, water
Answer:
identify the variables
Explanation:
control:type of lemon used
dependent:whether apple slice turns brown at pH>2
independent:pH value
The sun. The sun provides the energy for evaporation and even for the rest of the water cycle without the sun it wouldn't work. Unless you had a giant heat lamp over the ocean lol
I think you b and c is the other way around.
Regardless, the answer is Two elephants
The air pressure on your body is about 10kg same as the weight of 2 elephants
Answer
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