At what temperature does water freeze?

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?

When a scientific theory has been tested and proved by the scientific community, it becomes a law

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum