The Observation That the Moon's Average Density Is Similar to the Density

question 79

Multiple Choice

The observation that the Moon's average density is similar to the density of Earth's ________ supports the collision theory of the Moon's origin.

• A) oceans
• B) average density
• C) core
• D) atmosphere
• E) mantle

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Definitions:

Enzymes

Biological molecules that significantly speed up the rate of virtually all of the chemical reactions that take place within cells.

Exocytosis

The process by which cells release substances (such as neurotransmitters and hormones) outside the cell by the fusion of a vesicle with the plasma membrane.

Synaptic Vesicles

Membrane-bound sacs in neurons that store neurotransmitters, which are released into the synaptic cleft to transmit signals between neurons.

Neurotransmitters

Chemical messengers that transmit signals across a synapse from one neuron to another 'target' neuron, muscle cell, or gland cell.