Input: Answer this question:
About how many Earth days does it take the Moon to travel around Earth?
OPTIONS:
- 1
- 27
- 180
- 365
Answer: 27

*Question*: When a balloon is filled with air and suddenly released, it will fly around the room as the air escapes. If compared to space transportation, the escaping air is most similar to what subsystem of a spacecraft? OPTIONS:
- guidance
- propulsion
- support
- suspension
*Answer*: propulsion

question:
The water contained in a geyser system gains energy from the underground material surrounding it. The water molecules gain kinetic energy and this results in an increase in the pressure of the water. Eventually the geyser erupts and expels water into the air above ground. Which of the following types of energy is the source for the initial energy gain of the water?
OPTIONS:
- electrical
- magnetic
- mechanical
- thermal

answer:
thermal

[Q]: Sugar is made up of many molecules. When sugar is dissolved in water, what happens to these molecules?
===
OPTIONS:
- They no longer exist.
- They exist in solution.
- They evaporate.
- They combine with water to form new elements.
****
[A]: They exist in solution.

question below:
A gas is heated and its temperature increases. What happens to the gas molecules?
OPTIONS:
- They get bigger.
- They move faster.
- They move slower.
- They increase in number.
answer below:
They move faster.

question below:
Which is a problem with using wind turbines to produce energy?
OPTIONS:
- Wind turbines are efficient only in certain areas.
- Wind turbines occupy a small area of land.
- Wind turbines produce a large amount of energy.
- Wind turbines create a large amount of pollution.
answer below:
Wind turbines are efficient only in certain areas.