Question

Magma exists below tEarth's crust.
B. Magma can push through holes or cracks in the crust.
C. All magma intrusions result in volcanoes on Earth's surface.
D. Layer A must exist at higher temperatures than the other layers.

According to the law of superposition, we can conclude that layer A in the diagram is the oldest layer. Based on the layers and structures seen here, we can draw additional conclusions. Review the prompt and select all that could apply.
Responses
A A and DA and D
B A, B, DA, B, D
C A and BA and B
D A, B, C, D

Answer 1

Answer: C (A and B)

Reasons:
- A (Magma exists below Earth's crust): True — magma is generally found beneath the crust (and the diagram shows an intrusion/magma body below the layers).
- B (Magma can push through holes or cracks in the crust): True — magma moves upward through fractures and weaknesses in the crust, producing intrusions or eruptions.
- C (All magma intrusions result in volcanoes on Earth's surface): False — many intrusions solidify underground as plutons, sills, dikes, etc., and never become volcanoes.
- D (Layer A must exist at higher temperatures than the other layers): Not necessarily true — being older or deeper may correlate with higher temperature, but you cannot conclude it "must" be hotter from the diagram alone.