Science

PLEASE CHECK MY ANSWERS :)
answers marked below

1. Which of Earth’s spheres contains most of its mass? (1 point)
atmosphere ***
hydrosphere
geosphere
biosphere
2. Erosion and weathering are examples of which types of forces? (1 point)
constructive forces
destructive forces ***
gravitational forces
inertia-related forces

3. Which of the following statements about
Earth’s atmosphere is true? (1 point)
Earth’s atmosphere contains 78 percent water vapor, which is essential to life.
Earth’s atmosphere contains 21 percent oxygen.
Earth’s atmosphere contains carbon dioxide, which all life forms require. ****
Earth’s atmosphere allows radiation from the sun to pass through it and warm Earth’s surface.
4. The strength of the force of gravity between two objects is determined by which of the following factors? Select all that apply. (2 points)
the masses of the objects ****
the distance between the objects
the volumes of the objects
the surface area of the objects
5. Earth and the moon are kept in their respective orbits due to the influence of (1 point)
inertia
gravity ****
both inertia and gravity
neither inertia or gravity
6. Earth’s rotation takes about _____, whereas its revolution takes about _____. (1 point)
one day; one year ***
one year; one day
one month; one year
one day; one eclipse
7. Earth’s tilted axis affects the strength of sunlight in different places on Earth’s surface. If you are in an area that is receiving less direct sunlight, where are you located? (1 point)
near the equator ****
near the North Pole
near the South Pole
near the North or South Pole
8. Which of the following motions causes day and night? (1 point)
the sun’s movement in the sky
Earth’s revolution around the sun
Earth’s movement in space
Earth’s rotation on its axis ****
9. Which of the following descriptions of the moon’s surface is accurate? (1 point)
The moon’s surface is wet and smooth. ****
The moon’s surface is dry and irregular.
The moon’s surface has mountains and oceans.
The moon’s surface is exactly like Earth's surface.

10. Why can you never see the far side of the moon from Earth? (1 point)
because Earth is spinning too quickly ****
because it cannot be seen during daylight hours
because the moon rotates once on its axis in the same time that it takes to revolve around Earth
because the moon does not rotate
11. During what phase of the moon can a lunar eclipse occur? (1 point)
new moon
first quarter ****
waxing gibbous
full moon
12. Which of the following is the smallest conceivable amount of time that could pass between a lunar eclipse and a solar eclipse? (1 point)
about 14 days
about 28 days
about 183 days ****
about 365 days
13. When are tides in Earth’s oceans the highest? (1 point)
during the moon’s waning gibbous phase
during the moon’s waxing gibbous phase
when the moon is at a right angle to the sun
when the sun, Earth, and moon are in a line ***
14. Under which of the following circumstances do neap tides occur? (1 point)
during the new moon phase ****
when the sun’s pull is in the same direction as the moon’s pull
when the sun’s pull is at a right angle to the moon’s pull
during the full moon phase
15. Why doesn’t the moon move away from Earth? (1 point)
because the moon’s orbit is too small ****
because Earth’s gravity is strong
because the moon has a large mass, and this creates a greater inertia for the moon than for Earth
because the moon has nowhere else to go
16. Which of the following best describes constructive forces? (1 point)
forces that build up, or create, landmasses
forces that wear down, or destroy, landmasses
forces that change the appearance of weathered rock ****
forces that are constant
17. Why did the following change occur? The snow that covered the ground all winter began to melt, temperatures rose, and flowers started to bloom. (1 point)
Days became shorter.
The Earth tilted away from the sun.
The sun's rays became more concentrated. ***
Earth completed one revolution.
18. True/False

Tides are caused by the force of inertia from the sun and moon acting on Earth. (1 point)
true
false***

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  1. 1. wrong
    2. right
    3. wrong
    4. both mass and distance G M1M2/d^2
    5. both (or they would bash each other)
    6. right
    7. It is near the poles that you have darkness at noon when the sun is above the other Capricorn or Cancer :)
    8.Right
    9. WRONG!!!! (google moon landing)
    10. Wrong - think get light and apple and pingpong ball
    11. The moon can enter the shadow of earth in a full moon
    12. between full moon and new moon is about half a month!
    13. Good, my thing !
    14. Wrong, think other situation from 13 above. moon and sun not helping each other
    15. NO! Earth Gravity holds it in orbit exactly balancing centripetal acceleration times mass.
    16. It says "construct"
    17. Seasons are caused by the tilt of the earth axis of rotation.
    18. Right, it is gravity not inertia (although I could give an argument that included v^2/R :)
    16.

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  2. relook at 1,3,4,7,9,10,11,12,14,15,16.

    You dont guess very well.

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  3. @bobpursley I actually tried, guess I'm just so thanks.

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  4. Thank you Damon

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  5. I just took the test and here are the answers.
    1C
    2B
    3B
    4A,B
    5C
    6A
    7D
    8D
    9B
    10C
    11D
    12A
    13D
    14C
    15B
    16A
    17C
    18FALSE
    19BD
    the rest you have to do on your own these answers are 110% correct

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  6. BEWARE OF PRANKSTERS!

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    👤
    Ms. Sue
  7. He is right

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  8. 19 is A & C not B & C. The other ones are correct tho.

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