How Our Solar System Formed

There is a medium-sized star at the center of our solar system. This is:

• Earth

• The Sun

• Jupiter

• Venus

Explain how the Sun was born:

• A cloud (called an nebula), consisting of mostly helium and hydrogen, collapsed in on itself and nebulas separated. The nebulas collided often and violently, and generated enormous amounts of heat. This heat caused the protons in the atoms to fuse. This turned into the enormous energy of the sun.

• A cloud (called an atom), consisting of mostly helium and hydrogen, collapsed in on itself and atoms separated. The atoms collided often and violently, and generated enormous amounts of heat. This heat caused the protons in the atoms to fuse. This turned into the enormous energy of the sun.

• A cloud (called a nebula), consisting of mostly helium and hydrogen, collapsed in on itself and atoms separated. The atoms collided often and violently, and generated enormous amounts of heat. This heat caused the protons in the atoms to fuse. This turned into the enormous energy of the sun.

• A cloud (called an nebula), consisting of mostly helium and hydrogen, collapsed in on itself and atoms separated. The atoms collided seldom and softly, and generated enormous amounts of heat. This heat caused the protons in the atoms to fuse. This turned into the enormous energy of the sun.

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Is the following statement a fact or an opinion?

Each planet began as microscopic grains of dust in the accretion disk.

• Fact

• Opinion

Which of the following features are needed for something to be called a planet:

• It must orbit the Sun.

• Life must be possible on it.

• It must be big enough for its own gravity to shape it into a sphere.

• It must have cleaned its orbit from smaller objects.

• It must contain at least one moon.

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CCSS.RI.7.2

How did scientists conclude that our Solar System formed 4.568 billion years ago?

• They used lightyears to calculate this statistic.

• They examined the cloud complex covering Orion's constellation.

• They used a telescope to examine the stars in the Milky Way.

• They examined the age of rocky materials from the Asteroid belt.

Identify the planets that are referred to as rocky or terrestrial planets:

• Mercury

• Venus

• Earth

• Mars

• Jupiter

The concept of "Goldilocks Conditions" is used to refer to which planet?

• Mars

• Earth

• Uranus

• Pluto

Which of the following statements about the Moon is not something that scientists believe?

• It was a very small planet at some time in the past.

• It collided with the Earth about 4.45 billion years ago.

• The moon keeps the Earth's axis straight.

• It consists of material that flew off the earth and into space.

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CCSS.RI.7.8

Exoplanets refer to planets that cannot be seen, are outside our solar system and are relatively small.

• True

• False

What is Orion's constellation?

• A collection of planets 1 500 light years from the Earth.

• A collection of stars 1 500 light years from the Earth.

• A collection of planets 1 500 light years from the Sun.

• A collection of stars 1 500 light years from the Sun.