6th Grade 3rd 9 Weeks Test Review

Which of the following has the greatest effect on the Earth's tides?

• the moon's gravitational pull

• the sun's gravitational pull

• the gravitational pull of Venus

• the gravitational pull of Mars

Which of the following best represents a spring tide?

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Refer to the diagram. A neap tide occurs at __________ while a spring tide occurs at _________.

• X and Z; W and Y

• X and W; Y and Z

• W and Y; X and Z

• Y and Z; X and W

Different relative positions of the sun, the moon, and Earth have different effects on Earth’s oceans. Which model shows the positions of the sun, the moon, and Earth that have the greatest effect on ocean tides?

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Observe the diagrams and select the best representation of a Spring tide.

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Examine the alignment of the Earth, Moon, and Sun in the following diagram.  What effect will this alignment have on the ocean tides?

• The Earth, Moon and Sun are never aligned this way.

• This arrangement of the Earth, Moon and Sun will cause Neap Tide.

• This arrangement of the Earth, Moon and Sun will cause a Spring Tide.

• This arrangement of the Earth, Moon and Sun will have no effect on the ocean tides.

Choose the alignment of the Earth, moon, and the Sun that best represents a Spring tide.

• Third quarter, Earth, New moon, the Sun

• First quarter, Earth, New moon, the Sun

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  Full Moon, Earth, New Moon, the Sun

• None of the above

A student is building a model of the layers of the Earth. Which material would best represent the crust?

• Grouping of magnetic balls

• Styrofoam packing pellets

• Bag of shredded paper

  
  

• Thin layer of plaster

Some students use an apple to represent the Earth. What is the best reason to use an apple for his comparison?

• The skin of an apple is very thin, and the crust of the Earth is very thin.

• The flesh of an apple is made of the same material all the way through, and the interior of the Earth is the same all the way through.

• The seeds of the apple are very light in comparison to the rest of the apple, and the core of the Earth is also made of very light matter.

• The stem of the apple comes from the core and the North Pole comes from the Earth’s core.

Which layer in the image above represents the layer of the Earth composed of liquid metal?

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