Explain why some types of magma form igneous rocks that are dark colored and dense.

They are rich in iron and magnesium and poor in silica Identify the property of magma that causes it to be forced upward toward Earth's surface. It is forced upward to the surface because it is less dense than the surrounding rock around it

Explanation:

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg