Q: Fact 1: Cells secrete acids and bases to maintain the proper pH for enzymes to work. Fact 2: Acids and bases are electrolytes. Given the two facts above, what do cells secrete to maintain the proper pH for enzymes to work?

OPTIONS:
- Energy
- Chemical energy
- water conservation
- sweating
- heat energy
- aqueous solution
- Organic compounds
- electrolytes

A: electrolytes

Q: Fact 1: Chemical weathering causes iron in rock to oxidize. Fact 2: Iron oxide gives a rusty red color to sedimentary rocks. Given the two facts above, what gives a rusty red color to sedimentary rocks?

OPTIONS:
- food coloring
- The area was once underwater
- chemical weathering
- remains of prehistoric life
- deoxyribonucleic acid
- sea urchins
- dirt
- earthquakes

A: chemical weathering

Q: Fact 1: Female gametophytes produce eggs inside the ovaries of flowers. Fact 2: Flower buds appear in the growing tip of the plant. Given the two facts above, where do female gametophytes produce eggs?

OPTIONS:
- peachleaf willow
- The bottom of plants
- Earth orbiting the Sun
- The middle of plants
- the environment
- underground
- The tips of plants
- plant reproduction

A: The tips of plants

Q: Fact 1: Sweat is used for adjusting to hot temperatures by some animals. Fact 2: Adjusts controls to regulate temperature and humidity of animals' quarters. Given the two facts above, what is used to adjust controls to regulate temperature?

OPTIONS:
- glass
- motors
- neurons
- power
- copper
- sweat
- forces
- keratin

A:
sweat