Question: Choose your answer.

How is the stratosphere different from the troposphere?

OPTIONS:
- The clouds in the stratosphere produce more rain.
- The air in the stratosphere has a greater density.
- The composition of the stratosphere lacks ozone.
- The temperature of the stratosphere warms at higher altitude.
My Answer: The temperature of the stratosphere warms at higher altitude.

Question: Choose your answer.

Which statement identifies an energy source as renewable?

OPTIONS:
- Oil, because it is found underground.
- Wind, because it is always available.
- Water, because it is becoming scarce.
- Coal, because it was formed from plants.
My Answer: Wind, because it is always available.

Question: Choose your answer.

A scientist is comparing two body cells of a multicellular organism. Which of the following is most likely identical?

OPTIONS:
- shape of cell walls
- number of mitochondria
- shape of cell membranes
- number of chromosomes
My Answer: number of chromosomes

Question: Choose your answer.

Scientists Stanley Miller and Harold Urey sealed water, methane, ammonia, and hydrogen in a flask, to simulate Earth's early environment. They exposed the chemicals to electric charges to simulate lighting. What did the process produce?

OPTIONS:
- bacteria
- nucleic acids
- viruses
- amino acids
My Answer:
amino acids