Each element is made of A. many types of atoms
B. the periodic table
C. one type of atom
D. molecules

True or false, the three major scales used to measure earthquakes are mercalli scale, richter scale and magnitude scale

How does climate change cause the ocean's thermohaline current to slow down?

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures