The upper rock layers are much younger. The archaeologist was digging and saw that the youngest rocks were in layers that were shallower or deeper?
shallower

Lower rock layers were laid down earlier, so they are assumed to contain older fossils. Gerald laid down many rock layers. The layers on the bottom level were likely laid first or last?
first

Q: The farther the sound waves travel away from the source, the more spread out their energy becomes. If Milo is listening to the radio and he moves closer to the radio in the room, what happens to the sound waves entering his ear they spread out less or they spread out more?
A: they spread out less

Question: The higher the crests of a wave are, the greater the amplitude. Ian surfed a 6 foot wave. Tony surfed a 10 foot wave. The wave with the highest amplitude was Tony's or Ian's?
Answer: Tony's

*Question*
The higher up a food chain that humans eat, the greater the levels of toxic metals they take in. Mike is studying what humans eat. Bears are higher up the food chain than mosquitoes. Therefore, if humans were to eat mosquitoes, they would likely be taking in less or more levels of toxic metals?
**Answer**
less

Q: In the mesosphere, temperature decreases as altitude increases. Mikey is studying the mesosphere. He is looking at temperatures at various altitudes within this layer of the atmosphere. If he took the temperature at 31 miles above the Earth's surface, and then again at 40 miles above the Earth's surface, the temperature would be lower at a height of 31 miles or 40 miles?
A: 40 miles