The solar system has ____ planets. 99.9% of the mass of the solar system comes from the ____. The third planet from the sun is ____. ____ is not considered a gas giant. ____ is the furthest planet from the sun and is named after the Roman god of the sea. The largest planet in the solar system is ____. ____ is called 'the red planet' because of the rust in the rocks and soil. ____ causes the planets to stay in orbit around the sun. A ____ is known as a dirty snow ball. ____ is a planet the is tilted on its side. Mars is ____ than Earth. ____ is the closet to the sun, but the hottest planet is ____. An astronomical unit (AU) is the average distance ____ The amount of time that an object takes to spin once on its axis is its ____. ____ has the largest temperature range from day to nigh ____ tail of a comet always blows away from the sun. The inner planets are different from the outer planets because ____ The asteroid belt is located between ____. The temperatures on Neptune are ____ compared to Earth’s temperatures. In terms of orbit, the Earth is to the sun as ____ is to the Earth ____ on the surface is what scientist look for on other planets as proof of live. The ____ has minor planet-sized objects that orbit the sun in a flat belt beyond Neptune’s orbit. ____ is the next planet moving outward from the sun after Saturn. ____ is a terrestrial planet because it is a dense rocky body. On ____ the run-away greenhouse effect of its atmosphere makes it very hot. Landforms that look like dry riverbeds are evidence that there was liquid water on ____. ____ is the only planet know to support life.

The Solar System

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