Gravity, inertia, and planets

Which model correctly illustrates how gravity and inertia work together to keep objects in orbit?

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Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Earth orbits in a curved, elliptical path and not a straight line. What can you conclude about Earth's orbit?

• The orbit is only affected by gravity.

• The orbit is affected more by inertia than by gravity.

• The orbit is a balance between its inertia and the force of gravity.

• The orbit is affected more by gravity than by inertia.

Tags

NGSS.MS-ESS1-2

Planets are slightly closer to the sun at certain points in their orbits. Why does this occur?

• The planets have elliptical orbits which cause them to be slightly closer to the sun at certain points in their orbits.

• The sun moves back and forth throughout the year.

• The sun's strength changes over time, and its gravity pulls harder in some months.

• Planets have a circular orbit, and the sun is always equidistant from the planets.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-ESS1-3

Which statement describes how gravity and inertia work together?

• Inertia and gravity work together to keep an object moving in a straight line.

• Gravity works against inertia to send objects backwards from where they came from as they travel throughout the solar system.

• Gravity and inertia do not exist in space so the objects would just be moving on their own curved paths.

• Inertia works to keep an object moving forward in a straight line, while gravity pulls the object towards a greater mass allowing the object to move in a curved path.

Tags

NGSS.MS-ESS1-2

The force of gravity is based on what two factors?

• inertia and position of sun

• speed of an object and how far away it is

• mass of an object and their speed

• mass of an object and distance between them

Tags

NGSS.MS-PS2-4

Which of the following is true about Earth?

• Earth is the only planet that has an abundant amount of water found in all three phases (solid, liquid, gas)

• Earth's atmosphere is composed of primarily (more than 50%) oxygen.

• Earth orbits the sun in about 365 days, a time that is much shorter than it takes Jupiter to orbit the sun.

• Earth is considered an outer planet, since it has a rocky terrain as an outer layer.

Tags

NGSS.MS-ESS2-4

Which statement best explains how Earth and Mars are similar?

• Earth and Mars are a similar size.

• Earth and Mars share the same temperatures.

• Earth and Mars are rockier planets.

• Earth and Mars are the same distance from the sun.

Which shows our location in the Milky Way galaxy?

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Tags

NGSS.MS-ESS1-2

Which astronomy is credited with discovering the planets elliptical (oval) orbits?

• Johannes Kepler

• Claudius Ptolemy

• Nicolaus Copernicus

• Isaac Newton

Which of the following are terrestrial planets?

• Jupiter, Mars, Earth, Saturn

• Saturn, Mercury, Venus, Neptune

• Mercury, Venus, Earth, Mars

• Neptune, Saturn, Uranus, Venus

Tags

NGSS.MS-ESS1-3