Earth and Mars

What are the two reasons the Mars is called the Red planet?

It has a reddish tinge when you see it in the sky. The reddish color is due to the breakdown of iron-rich rocks, which creates a rusty dust that covers much of it''s surface

Why does Mars have seasons like the Earth does?

It has a tilted axis.

What makes Earth's atmosphere different from that of other planets?

It has an atmosphere rich in oxygen.

How is Mar's atmosphere different from Venus's?

Mar's atmosphere is much thinner.

Why can't water exist on Mar's surface now?

Mar's atmosphere is too thin and any liquid water would quickly turn to gas?

How does Mar's atmosphere compare the Earth's?

Mar's clouds are much thinner than Earth's.

Name the 4 inner planets

Mercury, Venus, Earth, Mars

What is the other gas that makes up about 78% of the Earth's atmosphere?

Nitrogen

What do scientists infer about this ancient water flow on Mars?

That Mars must have even much warmer and had a thicker atmosphere at one time.

What did the American astronomer, Percival Lowell declare between 1890 and the early 1900's?

That the channels on Mars were built by intelligent Martians.

What is the name given to the 4 inner planets?

The Terrestrial Planets

What doe scientist now think created the huge canyon's and features on Mars?

A larege amount of liquid water that flowed on Mar's surface in the distant past.

Where do scientist think a large amount of water on Mar's may be?

Frozen underground.

What is the temperature range on Mar's?

-140 C to 20 C

How far above Earth's surface doe the atmosphere extend?

100 km or 62.5 miles.

What percentage of the Earth's surface is covered in water?

70 percent

What percentage of Mar's atmosphere is Carbon Dioxide?

95 percent

What happen during the Martian winter?

An ice cap grows larger as a layer of frozen carbon dioxide covers it. As the one ice cap grows during the winter, the ice cap in the other hemisphere shrinks because it has an opposite season.

What are the 3 layers of the Earth's surface?

Crust, Mantle and Core

What does the word "terra" mean in Latin?

Earth

What is the name of the Italian astronomer who is 1877 said he saw canale or channels on Mars?

Giovanni Schiaparelli

What keeps the Earth's atmosphere from floating away?

Gravity

Where is Mar's water now?

In the two polar ice caps and a small amount also exists as water vapor.

What two qualities of water make it important to life on Earth?

It exists as a liquid, gas or solid and it is important in shaping the Earth's surface, wearing it down and changing it's appearance over time.

What planet's atmosphere is similar to Mars?

Venus