8th Grade Science Midterm

What is the term used to describe the brightness of a star as seen from Earth?

• Luminosity

• Apparent Magnitude

• Temperature

• Size

What is the primary force responsible for the formation of planets and stars?

• Electromagnetic force

• Nuclear force

• Gravity

• Friction

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Explain how gravity affects the motion of planets in the solar system.

• It pushes planets away from the Sun.

• It keeps planets in orbit around the Sun.

• It has no effect on planetary motion.

• It causes planets to collide with each other.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which of the following best describes the hierarchical relationship between the solar system, galaxy, and universe?

• Solar system > Galaxy > Universe

• Galaxy > Universe > Solar system

• Universe > Galaxy > Solar system

• Galaxy > Solar system > Universe

Identify the color of a star that indicates it has the highest temperature.

• Red

• Yellow

• Blue

• White

How does the distance between astronomical objects affect our observation of them?

• Objects appear larger the farther they are.

• Objects appear brighter the farther they are.

• Objects appear smaller and dimmer the farther they are.

• Distance has no effect on observation.

What is the approximate number of galaxies in the universe?

• Hundreds

• Thousands

• Millions

• Billions

Tags

NGSS.MS-ESS1-2

Which property of a star is measured by its absolute brightness?

• Distance from Earth

• Luminosity

• Temperature

• Size

Describe the role of gravity in the formation of solar systems.

• Gravity repels objects, preventing formation.

• Gravity attracts objects, leading to the formation of solar systems.

• Gravity has no role in solar system formation.

• Gravity only affects the formation of stars, not solar systems.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

How does the size of a star affect its luminosity?

• Larger stars are less luminous.

• Smaller stars are more luminous.

• Larger stars are more luminous.

• Size does not affect luminosity.