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28 Cards in this Set
- Front
- Back
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Which one of the following planets has the most atmospheric mass? |
Venus |
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Which one of the following has relatively the largest amount of hydrogen |
Jupiter |
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The planet with the largest amount of carbon dioxide in the atmosphere is |
Venus |
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Lowest solid to gaseous mass ratio |
Neptune |
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Temperature in degrees celsius of the outer solar photosphere is estimated to be about |
5500-5700 |
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The radius of Earth is about |
6,371km |
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The density of the Earth is about |
5.52 gm/cm^3 |
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The temperature at the center of the Earth is estimated to be about |
6,500°C |
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The pressure at the center of the Earth is about |
1 million atmospheres |
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Earth is estimated to be about 4.6 billion years old, based on |
Isotopic dates of some planetary materials |
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Mars is a red planet potentially because |
it had enough free oxygen to oxidize surface existing iron-bearing rocks |
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Moon rocks are different from terrestrial rocks because moon rocks contain |
Highly refractory materials |
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Oxygen content of the earth's atmosphere began to increase st about 2.8 billion years ago only after |
the current bacterial photosynthesis process came into existence |
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The bacterial photosynthesis process before the current one involved the utilization of |
H2S |
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The average density of Sun, expressed in gm/cm^2 |
1.41 |
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Nearly 99% of all the atoms in Sun consist of |
H and He |
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Which planet has its axis of rotation tilted very highly |
Uranus |
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Mars has the following atmospheric composition |
0.13% O2 |
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Ice caps of Mars is covered at all times by |
Dry ice |
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An estimated amount of cometary and asteroid materials that come to Earth each year is about |
10^7 kg |
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Sunspots are |
Cooler regions than the surroundings |
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In recent times sun spot cycle is repeated about every |
11 years |
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The atmospheric composition of Earth is kept in |
Chemical disequilibrium possibly by activity of living materials |
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Earth's crust |
Is primarily silicate in composition |
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Earth's magnetic field is created by |
Materials within the core |
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Escape speed of an object from the surface of the Earth is about |
11.2 km/sec or 25,000 miles/hour |
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The average speed of hydrogen molecules at 0 degree centigrade is about |
1.69km/sec |
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Mist likely coming from the asteroid belt |
Iron meteorites |
