A rough metal bottom because there is more force being needed due to the rough edges moving against the ice instead of a flat, smooth surface which glides.
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... Solids, liquids and gases all expand when heat is added. Matter can change from one state to another when thermal energy is absorbed or released. ... heated, it absorbs thermal energy and its temperature rises. At some point, the temperature stops rising and the ice begins to change into liquid water. The change from the solid state to the liquid state is called melting.
C)because many orginisms can live in the same area.However an ecosytem does not always eat the same the same food
Answer:
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Explanation:
