The Solar System

__________ is a small rocky particle that moves through space.

_________ is a bowl shaped depression caused by a meteorite.

Mercury has a core mad of _______ and ________. Its mantle is made of oxygen and silicon.

____________ is a meteoroid that strikes the surface of a planet or moon.

The amount of time it takes the Earth to rotate once on its axis is

_________ is the largest dwarf planet. It is three times farther from the Sun than Pluto.

__________ is a streak of light in the atmosphere made by a glowing meteoroid.

________ orbits the Sun in an oval-shaped orbit and is made of dust, gas, and ice.

The inner planets are closest to the Sun. They are also called the ________ planets.

Venus is covered by a thick layer of clouds, which are made of __________.

What is number 31?

A planet moves ___________ the closer it gets to the Sun.

__________ produces large amounts of energy in the Sun.

Mercury's surface is covered with impact _________, smooth plains, and high cliffs.

The outer planets are made of materials that are usually ___________ on Earth.

Millions of asteroids orbit the Sun between the orbits of Mars and Jupiter in ___________ belt.

Neptune has at least ______ moons and a faint ring system.

The oval shaped path the Earth follows as it travels around the Sun is __________.

Mars planet appears to be red because its soil contains

A planet has nearly a __________ shape.

As a comet approaches the Sun, it heats, changing some ice in the nucleus into a __________.

The solid inner part of a comet is the _________.

Many probes have examined the surface of Mars; most have looked for signs of ________.

Most of Saturn's moons are small, but one of them, __________ is larger than the planet Mercury.

Which planet shows no evidence of life, experiences great dust storms, and has a volcano as wide as Arizona?

The ___________ is used to measure long distances in the solar system, (equal to 150,000,000 km).

The Sun is a star made up mostly of _________.

The amount of time it takes for the Earth to orbit the Sun is ___________.

Saturn is made up mostly of ________ and helium.

The second planet from the Sun is _________.

This is a spherical object that orbits the Sun, is not the moon of another planet and has less mass than the 8 planets