Chapter 20 Test
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Last updated about 5 years ago
50 questions
2
A nebula is held together by the balance of
A nebula is held together by the balance of
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After the solar nebula collapsed, its center became very hot and
After the solar nebula collapsed, its center became very hot and
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Planets began to form as
Planets began to form as
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The extra matter at the center of the solar nebula became the
The extra matter at the center of the solar nebula became the
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Earth's layers formed as rocks melted and
Earth's layers formed as rocks melted and
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The middle layer of Earth is the
The middle layer of Earth is the
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The layer of Earth that has the lightest materials is the
The layer of Earth that has the lightest materials is the
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Early life forms released oxygen into Earth's atmosphere through the process of
Early life forms released oxygen into Earth's atmosphere through the process of
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Scientists think that Earth's early atmosphere was made up of
Scientists think that Earth's early atmosphere was made up of
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The closer a planet is to the sun,
The closer a planet is to the sun,
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The gravitational attraction between two objects increases if
The gravitational attraction between two objects increases if
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What is an object's resistance to changes in speed or direction called?
What is an object's resistance to changes in speed or direction called?
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Earth's early continents formed as rocks melted and
Earth's early continents formed as rocks melted and
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The planets of the solar system formed as
The planets of the solar system formed as
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How might Earth be affected by the activity ofsunspots on the sun's surface?
How might Earth be affected by the activity ofsunspots on the sun's surface?
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A planet with a large orbit has a
A planet with a large orbit has a
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The dense layer of the sun that blocks light and energy is the
The dense layer of the sun that blocks light and energy is the
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What might sunspots affect on Earth?
What might sunspots affect on Earth?
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What happens if objects have more mass and move closer together?
What happens if objects have more mass and move closer together?
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What made the solar system form?
What made the solar system form?
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What happened as light rocks rose to Earth's surface?
What happened as light rocks rose to Earth's surface?
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How do planets move if they are closer to the sun?
How do planets move if they are closer to the sun?
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What process gives the sun its energy?
What process gives the sun its energy?
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The famous scientist who made important discoveries about the motion of planets around the sun was
The famous scientist who made important discoveries about the motion of planets around the sun was
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The length of the semimajor axiscan be used to describe
The length of the semimajor axiscan be used to describe
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The layer of Earth that extends 2,900 km below the surface and is made of elements such as magnesium and iron is the ______________________.
The layer of Earth that extends 2,900 km below the surface and is made of elements such as magnesium and iron is the ______________________.
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Earth started to become round as gravity crushed the rock at its _______________.
Earth started to become round as gravity crushed the rock at its _______________.
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A star may form after two ______________ collide.
A star may form after two ______________ collide.
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The sum of the distances from the edge of the curve to two points inside a(n) ________________ is always the same.
The sum of the distances from the edge of the curve to two points inside a(n) ________________ is always the same.
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Nuclear fusion occurs in the sun as a result of very high pressure and ________________.
Nuclear fusion occurs in the sun as a result of very high pressure and ________________.
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Gravity changes the straight line motion of a body in space into a curved ___________________.
Gravity changes the straight line motion of a body in space into a curved ___________________.
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Activity on the sun's ______________ can affect Earth's atmosphere.
Activity on the sun's ______________ can affect Earth's atmosphere.
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Sir Isaac Newton used the ______________ to explain why planets closest to the sun move faster.
Sir Isaac Newton used the ______________ to explain why planets closest to the sun move faster.
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As gas clouds collapse and temperature increases, a _______________ may form.
As gas clouds collapse and temperature increases, a _______________ may form.
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Thermal energy moves from the sun's interior by the circulation of gases in the _____________________.
Thermal energy moves from the sun's interior by the circulation of gases in the _____________________.
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A cooler area of the photosphere that may affect climate on Earth is a ______________________.
A cooler area of the photosphere that may affect climate on Earth is a ______________________.
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Gravity and ____________ must balance each other to hold a nebula together.
Gravity and ____________ must balance each other to hold a nebula together.
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The solar system was formed from a cloud called the ________________.
The solar system was formed from a cloud called the ________________.
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Gases circulate and carry energy to the sun's surface from the __________________.
Gases circulate and carry energy to the sun's surface from the __________________.
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Energy leaves the sun from the layer we see called the ____________________.
Energy leaves the sun from the layer we see called the ____________________.
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Giant eruptions on the sun's surface.
Giant eruptions on the sun's surface.
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Caused by the rotation and movement of energy of the sun, and reach far out into space.
Caused by the rotation and movement of energy of the sun, and reach far out into space.
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The visible surface of the sun.
The visible surface of the sun.
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A dense layer of the sun where light and energy are blocked and sent into different directions.
A dense layer of the sun where light and energy are blocked and sent into different directions.
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When two or more nuclei fuse to form another nucleus; the source of the sun's energy.
When two or more nuclei fuse to form another nucleus; the source of the sun's energy.
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May be affected on Earth by the surface activity of the sun.
May be affected on Earth by the surface activity of the sun.
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Cooler, dark areas of the photosphere of the sun.
Cooler, dark areas of the photosphere of the sun.
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The layer of the sun where gases circulate and carry energy to the visible surface of the sun.
The layer of the sun where gases circulate and carry energy to the visible surface of the sun.
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The outermost layer of the sun.
The outermost layer of the sun.
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Where the suns' energy is made; the innermost layer of the sun.
Where the suns' energy is made; the innermost layer of the sun.