Ques: With less ozone in the stratosphere, more UV rays reach the ground.  Carlos knows that there is less ozone in the stratosphere, and goes out on a sunny day. He puts on sunscreen knowing that the UV rays can reach the ground less or more?
Ans: more

Ques: Lighter, more streamlined vehicles need less energy.  Jim is designing a new car and playing around with different materials. If he were to decrease the weight of the vehicle, what would happen to the fuel efficiency of that vehicle? It would increase or decrease?
Ans: increase

Ques: Warmer molecules vibrate faster than cooler ones.  As molecules start moving slower they get warmer or colder?
Ans: colder

Ques: In erosion, a slower moving stream will only carry smaller particles.  A fast moving stream is capable of carrying larger or smaller particles than a slow moving stream?
Ans:
larger