1. Which of the following helps to maintain the temperature of the planet by keeping radiation from reaching the surface and/or reflecting radiation back out into space?
A. ice
B. ozone layer
C. clouds
D. all of the above
2. Which of the following helps to maintain the temperature of the planet by absorbing infrared energy?
A. water
B. atmosphere
C. soil
D. all of the above
3. What is the natural pH of the ocean?
A. Acidic
B. Basic
C. Neutral
D. Different depending on the location
4. Which of the following is not harmed by acid rain?
A. concrete buildings
B. glass windows
C. marble statues
D. iron railroad tracks
5. What is the name of the scientist who discovered that all elements have a unique spectrum?
A. Bohr
B. Kepler
C. Copernicus
D. Ptolemy
