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The Earth
The Earth
Test, practice and improve your knowledge of the Planet Earth.
by Daniel Pascariu
Last modified:
taken 174 times
1.  Earth is the
first planet from the Sun
second planet from the Sun
third planet from the Sun
forth planet from the Sun
2.  Of the terestrial planets in the Solar System, Earth is
the largest planet
the smallest planet
3.  When was the Planet Earth formed ?
4.54 million years ago
4.54 billion years ago
4.  When did life appear on Earth after its formation ?
within a million years
within a billion years
within ten billion years
5.  Life on land is possible because the harmful Sun radiation is blocked by
the ozone layer
Earth's magnetic field
both the ozone layer and Earth's magnetic field
6.  How much of Earth's surface is covered with water ?
30%
52%
71%
7.  The Earth's axis of rotation is tilted away from the perpendicular to its orbital plane, producing seasonal variations on the planet's surface with a period of one year. How big is the tilt ?
13.4°
23.4°
33.4°
8.  How big is the gravity on the surface of the Moon compared to the one on Earth ?
17% of the Earth's gravity
37% of the Earth's gravity
57% of the Earth's gravity
9.  What is the prevailing hypothesis today concerting the formation of the Moon ?
A Mars-sized body is believed to have hit the Earth, blasting sufficient material into orbit around the Earth to form the Moon through accretion.
The Moon broke off from the Earth's crust because of centrifugal forces, leaving a basin – presumed to be the Pacific Ocean – behind as a scar.
The Moon was formed elsewhere and was subsequently captured by Earth's gravity.
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Quiz Reference:
More info about the Earth on Wikipedia