question:
Some of Earth's water is stored underground in porous rock formations known as aquifers. Which of these could use up groundwater in aquifers?
OPTIONS:
- abundant rain in the Ozarks
- excessive pumping from wells
- dams on the lower Mississippi
- community water conservation

answer:
excessive pumping from wells

question:
If a neutral atom loses an electron, what is formed?
OPTIONS:
- A gas
- An ion
- An acid
- A molecule

answer:
An ion

question:
What atoms combine to make up a molecule of water? 1. 1 hydrogen, 1 oxygen 2.
OPTIONS:
- hydrogen,
- oxygen
- 2 hydrogen, 1 oxygen
- 2 hydrogen, 2 oxygen

answer:
2 hydrogen, 1 oxygen

question:
In any physical or chemical process, what two quantities are always conserved?
OPTIONS:
- matter and total energy
- light and acoustic energy
- density and thermal energy
- gravity and potential energy

answer:
matter and total energy