Here are the answers to your questions:
Question 1: __________ is the force that an object exerts on another object. Answer: Gravity
Question 2: Wearing a seatbelt in a moving vehicle prevents your ____________ from injuring you in a car crash. Answer: Inertia
Question 3: Which object has the most inertia when moving? Answer: Freight train
Question 4: In a vacuum (a space with no air and nor air resistance), a bowling ball and a feather are dropped at the same time and from the same height. Gravity pulls them toward the ground at the same speed. When will they reach the ground? Answer: Both will hit the ground at the same time.
Question 5: A figure skater can change the speed of their spinning by changing the height and shape of their body. This change in speed is because the skater changes their _____________. Answer: Inertia
Question 6: ______________ prevents muscular injuries. Answer: Flexibility
Question 7: ________________ help sprinters direct their inertia forward at the start of a race. Answer: Starting blocks
Question 8: _______________ require the use of oxygen over prolonged periods. These are activities like walking, running, jumping rope, swimming, and Zumba. Answer: Aerobic Exercises
Question 9: _________________ are those that can be completed in short bursts. Activities like weight lifting and yoga require you to perform a task in short spurts throughout the activity. Answer: Anaerobic exercises
Question 10: A bodybuilder is able to use his or her muscles to lift very heavy weights over a very short period of time. This demonstrates ________________. Answer: Anaerobic capacity.
Feel free to ask if you have any more questions!