6th Sci Space Ch. 2

How long does it take Earth to complete one rotation on its axis?

• 24 hours

• 365.25 days

• 60 seconds

• 12 days

What is the shape of Earth's orbit?

• perfectly circular

• straight line

• extremely elliptical

• slightly elliptical

Over time, Earth's rate of rotation is ____.

• increasing

• decreasing

• constant

• tilting

What is the longitude of the Prime Meridian?

• 0 degrees

• 23.5 degrees

• 66.5 degrees

• 90 degrees

Based on the Giant Impact Hypothesis, the moon was formed around ___.

• 2.5 billion years ago

• 4.4 billion years ago

• 13 billion years ago

• 6,000 years ago

What is the latitude of the Tropic of Cancer?

• 0 degrees

• 23.5 degrees N

• 66.5 degrees N

• 90 degrees N

Which layer of the moon is completely solid?

• crust

• mantle

• core

• atmosphere

What is one DIFFERENCE between the Earth and the moon?

• Earth is made of rock, moon is not

• They orbit the sun at different distances

• Earth rotates on its axis and moon does not

• The moon has less gravity than Earth

MOST of the electromagnetic radiation emitted by the sun is in the form of ___.

• gamma rays

• UV radiation

• visible light

• radio waves

Which element is NOT a major component of the sun?

• Helium

• Hydrogen

• Oxygen