This is a diagram of fossils found in the same area. Jamie wanted to know which layer of fossils is the oldest, so he asked his mom. Which layer of fossils did Jamie's mom tell him was the oldest?
A)
Layer 1
B)
Layer 2
C)
Layer 3
D)
Layer 4

One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?