The united states produces more than how many of the world's genetically modified crops?

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements? a. carbon remains carbon b. nitrogen c. oxygen d. hydrogen

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?