Which of the following provides the best evidence of how life has changed over time?
A. Volcanoes
B. Fossils
C. Rivers
D. Earthquakes

What does the Law of Superposition tell us about rock layers?
A. All rocks form at the same time
B. Older layers are on top
C. Older layers are on the bottom
D. Rock layers do not have a pattern

Which event would most likely leave a mark in Earth’s geologic record?
A. A single thunderstorm
B. A mass extinction event
C. A windy day
D. A moon eclipse

Which type of rock is most likely to contain fossils?
A. Igneous
B. Metamorphic
C. Sedimentary
D. Basalt