Geological Time Scale - AP Environmental Science

Card 1 of 30

0
Didn't Know
Knew It
0
1 of 2019 left
Question

Block diagram 2 01

Examine the given block diagram. Each letter represents a depositional event or a period of erosion. Place the letters in order from the oldest to youngest event.

Tap to reveal answer

Answer

The law of superposition states that the oldest rock layers are at the bottom. A real world example of this often takes place while cooking. When making a seven-layer dip, for instance, you place the oldest layer on the bottom of the dish and stack layers on top. The layer on top is the youngest. The earth is made of rock layers deposited in a similar way.

E represents a period of erosion, meaning there is "missing time" (rock layers have been eroded, so there are no rocks representing that time).

Block diagram 2 01

← Didn't Know|Knew It →