Which type or types of rock can become metamorphic rock?
a.
metamorphic and igneous rocks
b.
igneous, sedimentary, and metamorphic rocks
c.
igneous and sedimentary rocks
d.
only sedimentary rocks

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.

As the earth formed, the force of gravity increased due to increased mass. what effect did this increased gravity have on the forming planet?