What causes the Moon to revolve around Earth? A. Earth's Gravity
B. The sun's Gravity
C. The Moon's lack of Gravity

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.

Which is an example of a reversible physical change?