Q: What is a disadvantage of using moving water to produce electricity? OPTIONS:
- Power is produced inexpensively.
- Air pollution is produced.
- Oil spills may occur.
- The local ecosystem may be disrupted.
A: The local ecosystem may be disrupted.
The Periodic Table of the Elements is arranged so that elements with similar characteristics are in the same column. Which element is a highly reactive metal?
OPTIONS:
- chlorine (Cl)
- helium (He)
- magnesium (Mg)
- silver (Ag)

magnesium (Mg)
Q: Which is the best evidence that cell division is occurring constantly in our bodies? ---- OPTIONS:
- The body has to keep breathing around the clock.
- Active people often require more food than inactive ones.
- There are many different types of tissues in the human body.
- Human beings shed millions of

A: Human beings shed millions of
Sodium chloride, commonly called "table salt," is made up of sodium and chlorine that have been combined chemically. Which term best describes sodium chloride?
===
OPTIONS:
- Acid
- Atom
- Element
- Compound

Compound
Question:
Which of the following statements best explains why it is warmer at the equator than at the North Pole?
OPTIONS:
- The equator has a larger area than the North Pole.
- The equator is closer to the Sun than the North Pole.
- The equator receives more direct sunlight than the North Pole.
- The equator has more hours of daylight per year than the North Pole.
Answer:
The equator receives more direct sunlight than the North Pole.
*Question*: Which material is primarily a mixture of weathered rock and organic matter? OPTIONS:
- minerals
- soil
- ocean water
- seashells
*Answer*:
soil