CRASHCOURSE QUIZ BLOCK 6

Fill in the blank: The Earth takes about ____ hours to complete one rotation on its axis, causing day and night.

• 24

• 12

• 36

• 48

Fill in the blank: The Earth takes about ____ days to complete one orbit around the Sun, which causes the periodic nature of the seasons.

• 365

• 180

• 400

• 250

It takes about ____ month for the Moon to orbit the Earth, explaining the periodic nature of the Moon's phases.

• one

• two

• six

• twelve

What does the variable 'T' represent in the equation v = 2πr / T?

• The orbital period

• The radius of the orbit

• The velocity of the object

• The mass of the object

Refer to the diagram showing the Earth's rotation and orbit around the Sun. Which direction does the Earth rotate, causing the Sun and Moon to appear to rise in the east and set in the west?

• East to West

• West to East

• North to South

• South to North

What is the Moon?

• A planet that orbits the Sun

• A natural satellite that orbits around the Earth

• A star that emits its own light

• An asteroid in the solar system

How long does it take for the Moon to complete one orbit around the Earth?

• About 7 days

• About 14 days

• About 28 days

• About 365 days

The changes in the shape of the Moon as seen from Earth are called ________.

• phases of the Moon

• eclipses of the Moon

• craters of the Moon

• orbits of the Moon

Refer to the diagram of the Moon's phases. Which phase comes after the New Moon?

• Waxing crescent

• First quarter

• Full Moon

• Waning crescent

The average orbital speed of an object can be calculated using the formula: v = 2πr / T. What does 'T' represent in this formula?

• The average orbital speed

• The average radius of the orbit

• The orbital period

• The mass of the object