Mercury
Mercury is not much larger than the _____. It is the closest planet to the ______.
Earths moon, sun
Earths size almost because of its similar _____.
mass
Earth is the only planet to have ______ water at its surface. It only has one _____.
Mars' ____ atmosphere allows us to see the planets surface with a _____.
thin, telescope
A thin disk of ice and rock.
What is a ring?
It has no _____. It is covered by _______.
moons, craters
It has no moon. It takes this planet ____months to revolve and 8 months to rotate... A day is longer than a year!
7.5
Planet that is one ____ away from the sun.
astronomical unit
Has two moons that are assumed to be captured ____.
asteroids
What is a gas giant?
It is the outer planets that are all made of gas.
Mercury has no _______. Its mass is small so its gravity is _____. This planet has the greatest range of ______ than any other planet.
atmosphere, weak, temperatures,
Venus rotates the ____ direction from most planets.
Some scientists think that a large object that caused it to change direction.
opposite
Suitable ____ range for water to exist as a liquid, gas or solid. It is the only planet known to support life.
temperature
Planet with _______ in it's soil, giving it a red appearance..
iron oxide
The solid inner core of the comet.
What is a nucleus?
Extremely hot during the _____.
day
This is the planet that rains______.
sulfuric acids
Earth has enough _____ to hold onto the gasses needed for life.
gravity
Scientists think that a large amount of liquid flowed on mars' surface and ____ it.
shaped
A region beyond the kuiper belt.
What is the oort cloud?
With no atmosphere to trap the heat it gets extremely ______at night.
frigid
___ atmosphere that is so thick that we can't see the planets surface nor survive . The atmosphere creates a greenhouse effect that makes Venus the _____ planet in the Solar System.
Thick, hottest
Earth has ____ conditions.
goldilocks
Mars has a tilted axis which equals ___. As seasons change, windstorms will blow dust around giving the planet a reddish color. = red planet!
Giant volcanoes that are no longer active but there are signs of an ___ volcanoes. Olympus Mons is the larges volcano in the Solar System.
seasons, ancient
A streak that is caused by heat or friction.
What is a meteor?