Which layer of rock is the oldest?
A: Layer 1
B: Layer 2
C: Layer 5
D: Layer 6

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade

Ahis which describe the horizons in a soil profile? check all that apply. horizon a is mineral deficient. bedrock lies below the soil layers. te horizon o forms from organic material, horizon b undergoes the least amount of change. horizon c is least affected by the soil formation process.

Over half of the african-american population in the united states live in