What is tropical forest?

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

Which of the following is true of all geographic locations on earth?

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.