Question: Choose your answer.

Scientists estimate that Maryland contains more than 850 million tons of coal. Coal is most commonly used to produce ___.
My Answer: electricity

Question: Choose your answer.

In order for a glider to fly, its weight must be opposed by
My Answer: lift.

Question: Choose your answer.

Signs in many stores and restaurants warn that microwaves are in use. What is the main reason for this warning?
My Answer: Some people have pacemakers that may be affected by microwaves.

Question: Choose your answer.

Light rays are focused by the lens of a camera through the process of
My Answer:
refraction.