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8.7
Test Description: 8.7
Instructions: Answer all questions to get your test result.
1) Which force helps keep Earth in its orbit around the Sun?
A
Attraction between Earth and the Sun due to their masses
B
Attraction between the Earth and the Sun due to their magnetic fields
C
Repulsion between Earth and the Sun due to their masses
D
Repulsion between Earth and the Sun due to their magnetic field
2) The Sun's mass is so great that its ____________ keeps the planets in our solar system in orbit.
A
energy output
B
extreme temperature
C
gravitational force
D
ultraviolet rays
3) How many times does the Earth rotate in 48 hours?
A
24
B
29
C
1
D
2
4) The Earth rotates in which direction?
A
counter clockwise
B
clockwise
5) In the Northern Hemisphere, which direction does the Earth's axis point during the summer?
A
towards the moon
B
towards the sun
C
away from the moon
D
away from the sun
6) A student models Earth's motions in space using a globe and a lamp. Which action would best model that causes day and night on Earth's surface?
A
Spinning the globe on its axis near the lamp
B
Walking the lamp in a small circle around the globe
C
Walking the globe in a large circle around the lamp
D
Holding the axis of the globe at a tilted angle
7) What phase of the moon occurs approximately 14 or 15 days after a new moon?
A
A new moon which occurs 29-30 days after the previous new moon
B
A waxing crescent moon which occurs a few days after a new moon
C
A first quarter moon which occurs 7-8 days after a new moon
D
A full moon which occurs about half a lunar cycle after a new moon
8) Which phase of the lunar cycle occurs after a first quarter moon?
A
waxing crescent
B
waxing gibbous
C
waning crescent
D
waning gibbous
9) The best time to sail your boat through a narrow channel is when the water is highest. This means you should sail during ...
A
spring high tide, when the sun, earth, and moon are all in alignment
B
neap low tide, when the sun, earth, and moon are in an L-shaped configuration
C
neap high tide, when the sun, earth, and moon are all in alignment
D
spring low tide, when the sun, earth, and moon are in an L-shaped configuration
10) Which type of tide would occurs when the sun, earth, and moon are in an L-shaped configuration
A
neap tide
B
spring tide
*select an answer for all questions
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