6th Sci. U2.Study Guide

Emma, Avery, Benjamin, and Jackson are planning a night of stargazing. They are particularly interested in observing a lunar eclipse. They are discussing the moon's position relative to the sun and earth that may produce a lunar eclipse. What would you suggest?

• When the moon is between the sun and the earth

• When the earth is between the sun and the moon

• When the sun is between the earth and the moon

• None of the above

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Samuel, Maya, and Scarlett are on a field trip to the oceanography museum. They come across an exhibit that explains how some ocean currents are caused by differences in the density of water from place to place around the globe. They start discussing about the two factors that cause these differences in ocean water density. Can you help them?

• Samuel thinks it's differences in water temperature and wind.

• Maya thinks it's differences in water temperature and phases of the moon.

• Scarlett thinks it's differences in the amount of dissolved salts and gravity.

• They all agree on one point: it could be differences in water temperature and the amount of dissolved salts.

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Grace, Aria, and Priya are planning a trip to Ecuador, which is located on the equator. They are packing their clothes and notice that the temperature there remains about the same throughout the year. This is because this area:

• Has a greater tilt than other parts of the Earth.

• Receives less direct sunlight throughout the year.

• Receives similar amounts of sunlight throughout the year.

• Receives more direct sunlight than other parts of the Earth.

Sophia, Arjun, and Ethan are studying the Earth's movements in their geography class. They learn that as the Earth spins on its axis, producing day and night, it also orbits the Sun in an elliptical path that takes about 365 1/4 days to complete. The Earth's axis is tilted with respect to its orbital plane. Their teacher explained that when the Earth's axis points towards the sun, it is __________ for that hemisphere. What did the teacher say?

• Day

• Night

• Summer

• Winter

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Jackson, Arjun, and Noah are planning a picnic during a solar eclipse. They are discussing the conditions for this event to occur. Arjun suggests that a solar eclipse can ONLY occur when the moon is in which phase?

• New Moon

• Full Moon

• Quarter Moon

• Crescent Moon

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Evelyn, Mia, and Michael are planning a trip to witness a total solar eclipse, a rare celestial event that happens somewhere on Earth every 18 months on average. They discovered that these eclipses recur at any given place only once every 370 years. They are wondering why recurring solar eclipses are so rare. Can you explain?

• Because of the rotation of the moon and earth, the three rarely form a straight line.

• The light from the sun usually passes through the moon instead of being blocked by it.

• A total solar eclipse actually occurs monthly, but it is only visible from the equator.

• The Moon passes slightly above or below the line between the Sun and the Earth because of its tilted orbit.

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During a science fair at the local park, Ms. Garcia sets up a golf ball, a globe, and a flashlight on a table. After the sun sets, she turns on the flashlight from behind the golf ball. Priya, Maya, and Oliver notice the shadow of the golf ball falling on the globe. What is this setup trying to demonstrate?

• A solar eclipse

• The solar system

• The idea of gravity

• The surface of the moon

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Mia, Benjamin, and Liam were planning a night of stargazing. They were particularly interested in observing the moon and its different phases. They had learned in school that the moon's shape appears to change as it orbits the Earth, transitioning from a thin crescent to a full moon, and then back to a thin crescent. This cycle, they learned, is due to the moon's position relative to the Earth and the Sun. One night, they realized that the moon was positioned between the Earth and the Sun. What would the moon most likely look like to them on that night?

• New Moon

• Full Moon

• Half Moon

• Quarter Moon

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During a school trip to the planetarium, Benjamin, Ethan, Abigail, Hannah, Oliver, and Kai are learning about celestial events. The guide explains a scenario where the Moon, Earth, and Sun are aligned in a straight line. He mentions that during this event, the combined gravitational pull of the Sun and the Moon causes _________ tides on Earth.

• low

• neap

• slow

• spring

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On December 21 or 22, Emma, Isla, and Abigail were on a school trip to the North Pole. They noticed that the North Pole was tilted a full 23.5° away from the sun. This marked the beginning of winter in the Northern Hemisphere and is known as the winter solstice. On this day, the angle of the sun is the lowest and the Northern Hemisphere has the least amount of daylight. When the Northern Hemisphere is tilted toward the sun, it receives more direct rays of sunlight during the daytime than the Southern Hemisphere. They observed that during the summer, the land, oceans, and atmosphere in the Northern Hemisphere receive more direct rays of sunlight and...

• it becomes very hot.

• the days are longer.

• the days and night are of equal length.

• there is an increase in precipitation.

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