1. What finally sparked the U. S. to beat the Soviet Union? 2. What are some of the challenges the U. S. faced to go to the Moon? List at least five challenges.

3. What did we learn from Apollo 1 and what was one thing that NASA fixed for future lunar missions?

4. Which Apollo 11 Astronaut contributed the most to the lunar missions? List at least three contributions.

More solar radiation is absorbed by earth’s surface than by

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.