How do you know there is energy in carbohydrates?

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?