semester 2 review

A system of stars, gas, dust, and dark matter bound together by gravity is called -

• an asteroid

• a moon

• a galaxy

• a nebula

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NGSS.MS-ESS1-2

Which of the following describes a nebula?

• A cloud of gas and dust where new stars form

• An oval-shaped cluster of densely packed stars

• An explosion at the end of a giant star’s life

• A star and all the planets that revolve around it

Which of the following best describes a star? A star is a celestial body -

• composed of rock and metal with a very high density.

• that is too big to be an asteroid, but too small to be a planet.

• that rotates on an axis and revolves around the Sun.

• composed of gases that emit light due to nuclear reactions.

Which of the following components of the universe is best described a system of stars, gases, and dust held together by gravity?

• a nebula

• a planet

• a meteor

• a galaxy

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NGSS.MS-ESS1-2

What happens when the area in which you live tilts away from the sun?

• It is summer.
• It is spring.
• It is winter.
• It is fall.

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NGSS.MS-ESS1-1

The Earth's axis is tilted _____ degrees.

• 23.5
• 25.3
• 30.2
• 24

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NGSS.MS-ESS1-1

The term equinox means....

• equal amount of day light and equal amount of night
• Equal amount of winter and summer
• Equal amounts of hot dogs for everyone
• The longest day of the year

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NGSS.MS-ESS1-1

What do June 21 and December 21 have in common?

• equinox dates
• the moon is full
• solstice dates
• the cold fronts blow in

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NGSS.MS-ESS1-1

What is the longest day of the year?

• winter solstice
• summer solstice
• fall equinox
• spring equinox

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NGSS.MS-ESS1-1

Why do we experience the changing of the season on the earth?

• distance from the sun
• rotation of the earth
• change in solar output
• tilt of the earth's axix

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NGSS.MS-ESS1-1

NGSS.MS-ESS2-6