3/28/25 Bellwork Quiz Review

The gravitational force of the Sun is powerful enough to hold Earth in orbit even though Earth is an average of 150 million kilometers away.  Which statement best describes why objects with much less mass than Earth are not pulled off the surface of the Earth toward the Sun?

• Objects on Earth are most influenced by Earth's gravity because of their proximity

• Objects on Earth are held in place by the gravity of the moon counteracting the Sun's gravity.

• Objects on Earth have too little mass to be affected by the gravity of the Sun.

• Earth's inertia around the Sun balances the gravitational pull of the Sun to keep it in orbit.

Which event, caused by gravity, initiated planet formation in the solar system?

• Matter remaining after the Sun's formation changed to different elements

• The Sun ejected material that had already undergone nuclear fusion.

• The Sun ejected all matter that was not suitable for nuclear fusion

• Matter remaining after the Sun's formation began to stick together.

Tags

NGSS.MS-ESS1-2

The moon is slowly getting further and further away from the Earth.  In a million years it will be difficult to see the moon in the night sky.  Neither the Earth or the moon have changed mass.  what must be occurring in order for the moon to be getting further away.

• The gravity of Earth is increasing

• The gravity of Earth is decreasing

• The moon is speeding up as it orbits the Earth.

• The moon is slowing down as it orbits the Earth

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

The planets in our Solar System tend to orbit the Sun along a flat plain.

Which statement below explains the reason for this orbit path?

• The constant rotating solar winds from the Sun blows the planet into a straight line making a disc.

• The gravity of the Sun pulls them that way as the force of gravity is in effect.

• The planets stay in an even plane as they lined up in order by size to orbit the sun.

• The leftover dust from the formation of the stars was dispersed in a flat disc around the sun.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

What caused star formation?

• Cosmic microwave background radiation
• Nuclear fusion in stars
• Gravitational collapse of gas and dust in molecular clouds.
• Supernova explosions

Tags

NGSS.MS-PS2-4