Answer:
A. Controlled variable
Explanation:
a controlled variable or a constant variable is a variable that doesnt change during an experiment
Answer:
your answer should be the bottom
sorry if im wrong
Explanation:
Answer:
Carbon
Explanation:
At room temperature20–22 °C (68–72 °F), nitrogen and oxygen are gases, while bromine is a liquid.
So they can prove there hypothesis is correct or have an understanding.
Answer:
Electric and heat
Explanation:
Forms of solar energy include electricity and heat
