Overtime, rock sediments form layers as a result of erosion A. Chemical weathering
B. Mechanical weathering
C. Erosion
D. Deposition

Which is an example of a decomposer? a. bear b. algae c. grass d. bacteria d bacteria

What causes eclipses? check all that apply. earth's rotation on its axis moon's shadow covering the sun earth's shadow covering the moon earth's orbit and moon's orbit occasionally aligning the moon and sun's gravity pulling in the same direction

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii