CSA 8.ESS1.1 ESSENTIAL STANDARD

Having been here on Earth for a while, you know that every year is made up of four seasons. What is the primary cause of the change from season to season?

• The tilt of the earth on its axis.

• The heating and cooling of the sun.

• The rotation of the earth on its axis.

• The change in distance from the earth to the sun during different seasons.

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DOK1

Which one of the moons in this picture shows the position during the full moon?

• M1

• M2

• M3

• M4

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DOK1

How are the movements of the Moon in the sky and Earth's rotation about its own axis related?

• The Moon appears to move from East to West due to Earth's East-to-West rotation.

• The Moon appears to move from East to West due to Earth's West-to-East rotation.

• The Moon actually moves from East to West while Earth rotates from West to East.

• The Moon and Earth both move from East to West, but Earth rotates at a lower speed.

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DOK1

As we look up into the night sky, the moon and stars appear to move from east to west. This is because we are

• watching the sky rotate overhead, from east to west.

• viewing them from the surface of the rotating Earth.

• also moving on Earth in the same direction, east to west.

• orbiting on Earth around the Sun and nothing is really stationary.

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DOK2

As the phases of the moon change, and we move from step C to D and back to A, we would say that the moon is ____________, or the view of the moon we see is getting smaller.

• waning

• waxing

• whisting

• whittling

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DOK2

When Earth is between the Moon and the Sun, the fully lit face of the Moon is seen from Earth. This phase of the Moon is called a ________ moon.

• crescent

• 
  full

• 
  new

• waxing

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DOK2

One night Katrina was studying the position of the stars and the Moon in the sky. She made a sketch of the position of the Moon in the sky, as shown in the figure.

What is the reason for this movement of the Moon in the sky?

• The rotation of Earth about its axis

• Earth’s orbital motion around the Sun

• The Moon’s orbital motion around Earth

• The rotation of the Moon about its axis

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DOK2

This image shows how a lunar eclipse occurs. A lunar eclipse occurs when the Moon passes directly behind Earth into its umbra, or shadow. As shown in the image, the Sun, Earth, and Moon align, with Earth in the middle. Given this information, which statement elaborates on why there is not a solar eclipse every month, as the Moon passes between the Sun and Earth?

• The Moon is not large enough to cast an umbra, or shadow, on a celestial body as large as Earth.

• Phases of the Moon prevent monthly solar eclipses because they cause the Moon's shadows to change.

• Craters on the surface of the Moon redirect the Sun's light toward Earth, decreasing the Moon's shadow.

• Most of the shadows cast by the Earth and Moon do not align because the tilts of each orbit is different.

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DOK3

At which position, shown in the diagram, would the Moon be seen in the sky roughly from sunset to sunrise?

• M1

• M2

• M3

• M4

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DOK3

Compare this image of a partial solar eclipse to that of a total solar eclipse. Which argument accounts for the difference in what you see during the partial solar eclipse?

• The Earth, Moon, and Sun are not in exact alignment.

• 
  This view is seen when you are standing in the umbra only.

• It is not time for the full moon phase so you see the partial eclipse.

• 
  The moon is farther away from the Earth and does not block the entire view,

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DOK3