Guide Question 2: What are the factors that affects gravitational potential energy? *This is a required questionGuide Question 3: What are the factors that affects kinetic energy? *

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

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.

The biosphere of the earth is made up of what compound? organic or inorganic?