Substances that cannot be broken down chemically into other substances are mixtures solutions compounds elements

Here’s one way to follow the scientific method. place the missing steps in the correct position in the process

Particles vibrate in a rigid structure and do not move relative to their neighbors.

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