Chapter 27.3

Venus rotates very slowly, only once every ____ days.

243

Mars orbital period is _____ days, and it rotates on its axis every 24 hours & ___ minutes.

687; 37

Venus's atmosphere is about ___ carbon dioxide. The high concentration of carbon dioxide in the atmosphere blocks most of the infrared radiation from escaping.

96%

Other planets are too close or too far away from the sun, so that the liquid water _____ or freezes

Boils

Several NASA spacecrafts have found evidence that liquid water did exist on Mars's surface in the past. Surface features on Mars are characteristic of ________ by water.

Erosion

The _________ effect on Venus makes the average surface temperature 464°C

Greenhouse

Earth's unique atmosphere & distance from the sun allow water to exist in a ______ state.

Liquid

____ is the 4th planet from the sun, about 50% farther from the sun than the earth us.

Mars

_________, the planet closest to the sun, circles the sun every 88 days. It rotates on its axis every 59 days

Mercury

Because Venus appears near the sun, Venus is usually visible from Earth only in the early ______ or ______. Therefore Venus is commonly called the evening star or the morning star

Morning or evening

Scientists think that the volcano has grown so large because Mars has __ moving tectonic playes

No

The largest volcano on Mars is _________ ____ which is newly 3 times as tall as Mount Everest. The base is 350km across, about the size of Nebraska.

Olympus Mons

Although most of the water on Mars is trapped in _______ _______ water also exists as ice just below the surface.

Polar icecaps

The _______ & ______ of Mar's atmosphere are too low for water to exist as a liquid on Mar's surface

Pressure & temperature

Scientists speculate Venus's surfaces undergoes periodic _________ as a result of massive volcanic activity

Resurfacing

Earth is the _____ planet from the sun

Third

_____ is the second planet from the sun & has an orbital period of 225 days.

Venus

Earth is the only known planet that has the proper combination of ______, _____________, & _________ to support life.

Water, temperature, & oxygen

Mar's _____ are much like Earth's _______ because its axis tilts at nearly the same angle as Earth does.

Seasons

Mercurcy, Venus, Earth, & Mars are the planets closest to the sun & are called the inner planets or _______ planets.

Terrestrial

One of the highly dense planets nearest to the sun; Mercury,mVenus, Mars & Earth

Terrestrial Planets