question:
Which of the following organisms produces energy from sunlight?

answer:
grass

question:
Which two factors determine the gravitational attraction between two objects?

answer:
mass and distance apart

question:
The Moon has the greatest effect on Earth's

answer:
ocean tides

question:
The Moon orbits Earth at a speed of approximately one kilometer per second. The Moon is kept in orbit by which of the following?

answer:
gravity