Outer Space

Why are all planets almost spherical in shape?

• Because a planet's gravity pulls equally from all sides.

• Because large bodies in space break apart due to gravity.

• Because gravity pulls all material towards the edge of a planet.

• Because rotation pushes outwards the material inside the planet

Why are asteroids mostly irregular in shape?

• Because their gravity pulls everything towards the center of the asteroid

• Because their gravity deforms the rocks present on their surface

• Because they have more mass than planets and therefore more gravity

• Because they have less mass than planets and therefore less gravity

Which of the following is a part of the heliocentric model?

• All objects in space move around Earth in perfect circles.

• All objects in space move around the sun.

• All objects in space move in parallel tracks.

• All objects in space are perfect spheres.

Tags

NGSS.MS-PS2-4

Which of the following is a part of the geocentric model?

• All objects in the universe are perfect spheres.

• All objects in the universe move around the sun.

• All objects in the universe revolve around Earth.

What part of geocentric model was incorporated in the heliocentric model?

• Earth is the center of the solar system.

• The sun is the center of the solar system.

• A central body is the center of the universe.

• Bodies in space move randomly around a central body.

Which of the following is a part of both geocentric model and heliocentric model?

• Earth is the center of the solar system.

• The sun is the center of the solar system.

• Astronomical bodies travel in straight paths.

• The bodies in space move in circular orbits.

A student made the following observations about astronomical bodies.

Observation 1: The sun rises and sets.

Observation 2: The stars move daily across the sky.

Which observation(s) can be explained using the geocentric model?

• Only observation 1

• Only observation 2

• Both observation 1 and observation 2

• Neither observation 1 nor observation 2

Tags

NGSS.MS-ESS1-1

Which of the following factors affects the strength of the gravitational force between two objects?

• Mass of the objects

• Shape of the objects

• Temperature of the objects

• Composition of the objects

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which of the following factors affects the strength of the gravitational force between two objects?

• The shape of the objects

• The composition of the objects

• The temperature of the objects

• The distance between the objects

which of the following quantities is inversely proportional to the gravitational pull between two objects?

• The sum of their masses

• The sum of their volumes

• The square of the distance that separates them

• The distance from their center to their surface