1. 1.
which of the following accurately describes the orbits of the planets in the solar system?
the orbits almost form a sphere and the planets revolve around the sun in different directions.
the orbits almost form a sphere and the planets revolve around the sun in the same direction.
the orbits are almost on a single plane and the planets revolve around the sun in different directions.
the orbits are almost on a single plane and the planets revolve around the sun in the same direction.
2.2.
why doesn’t every meteor become a meteorite?
many meteors break apart due to the sun’s gravitational pull before hitting earth.
many meteors are pulled away from earth by the sun’s gravity before hitting earth.
many meteors break apart due to earth's atmosphere before hitting earth.
many meteors are pulled out to interstellar space before hitting earth.
3.
why are comets icy bodies?
they cluster in streams.
they lose heat as they fall through earth’s atmosphere.
they orbit the sun between mars and jupiter.
they originate in areas beyond neptune
4.why are the nuclear reactions that occur in the center of the sun critical to life on earth?
life on earth depends on the heat and carbon released by the sun’s nuclear reactions.
life on earth depends on the heat and electromagnetic radiation released by the sun’s nuclear reactions.
life on earth depends on the energy and hydrogen released by the sun’s nuclear reactions.
life on earth depends on the energy and oxygen released by the sun’s nuclear reactions.