Ques: Electrons at lower energy levels, which are closer to the nucleus, have less energy. An electron with an increased energy level will have energy that is lower or higher?
Ans: higher

Ques: Nations that have more industry produce more hazardous waste. A small nation decided to lower its production capabilities and shut down several large factories. Would the river next to the factories have more hazardous waste or less hazardous waste??
Ans: less hazardous waste?

Ques: If the gas is heated, the particles will move faster as they gain more energy. Tina cools some oxygen gas. The oxygen particles will move faster or slower?
Ans: slower

Ques: The particles in matter are always moving. The more energy they have, the faster they move. The less energy particles in matter have, they move slower or faster.?
Ans:
slower