When is it theorized that the universe began?

• 4.5 billion years ago

• 13.8 billion years ago

• 10 billion years ago

• 5 billion years ago

What is the theory called that explains the beginning of the universe?

• String Theory

• Big Bang Theory

• Theory of Relativity

• Quantum Theory

Tags

NGSS.HS-ESS1-2

How did the solar system begin forming according to current theories?

• From a collision of two stars

• From a rotating disk of gas and dust

• From a single large asteroid

• From a black hole

Tags

NGSS.MS-ESS1-2

Describe one way in which the solar system is still changing today.

• The planets are moving closer to the Sun

• The Sun is getting larger

• Asteroids and comets continue to collide with planets

• New planets are forming

What is a distinguishing characteristic of terrestrial planets?

• They have thick atmospheres

• They are primarily composed of rock and metal

• They have rings

• They are larger than gas giants

Which of the following is a characteristic of gas giant planets?

• They have solid surfaces

• They are smaller than terrestrial planets

• They have thick atmospheres composed mainly of hydrogen and helium

• They have no moons

Identify a characteristic that distinguishes dwarf planets from other planets in the solar system.

• They have cleared their orbital path

• They are not spherical in shape

• They have not cleared their orbital path

• They are larger than terrestrial planets

Explain the role of gravity in the formation of astronomical objects.

• Gravity repels objects, preventing them from forming

• Gravity pulls together gas and dust to form stars and planets

• Gravity has no role in the formation of astronomical objects

• Gravity only affects objects that are already formed

Tags

NGSS.MS-ESS1-2

How does gravity affect the orbits of planets in our solar system?

• It causes planets to move in straight lines

• It keeps planets in elliptical orbits around the Sun

• It has no effect on planetary orbits

• It causes planets to stop moving

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Compare the atmospheres of terrestrial and gas giant planets.

• Terrestrial planets have thicker atmospheres than gas giants

• Gas giants have atmospheres composed mainly of carbon dioxide

• Terrestrial planets have thin atmospheres, while gas giants have thick atmospheres

• Both have similar atmospheric compositions