Question

1. what evidence would geologists look for to identify an unconformity? a. fossil content b. missing layers in the rock record c. volcanic activity d. horizontal bedding 6. which layer of earth is divided into continental and oceanic types? a. core b. mantle c. crust d. asthenosphere 7. what is the primary source of earths internal heat besides radioactive decay? a. solar radiation b. chemical reactions c. gravitational energy d. magnetic fields

Explanation:

• For the first question, an unconformity is indicated by missing layers in the rock record as it represents a gap in the geological time - sequence. Fossil content may not directly identify an unconformity, volcanic activity is related to other geological processes, and horizontal bedding is a general feature not specific to unconformities.
• For the second question, the Earth's crust is divided into continental and oceanic types. The core is the innermost layer, the mantle is below the crust and has different characteristics, and the asthenosphere is a part of the upper - mantle.
• For the third question, gravitational energy is the primary source of Earth's internal heat besides radioactive decay. Solar radiation heats the Earth's surface, chemical reactions are not the main source of internal heat, and magnetic fields are not related to the generation of internal heat.

Answer:

1. B. Missing layers in the rock record
2. C. Crust
3. C. Gravitational energy