Savvas Solar System

The order of the inner planets starting from the Sun is (a)   ​ (b)   ​ (c)   ​ (d)  

• Mercury

• Venus

• Earth

• Mars

Besides Venus, which inner planet has no moons?

• Mercury

• Venus

• Earth

• Mars

Pluto, Eris, and Ceres are all classified as

• meteors

• meteorites

• asteroids

• dwarf planets

Which planet is closest to the sun?

• Uranus

• Mercury

• Neptune

• Earth

What is MOST LIKELY the reason Earth moves in an orbit around the sun?

• Because the sun remains in motion with respect to Earth

• Because Earth and the sun exert a weak gravitational pull on each other

• Because Earth exerts a stronger pull on the sun than the sun exerts on Earth

• Because the sun's mass creates a gravitational force that pulls Earth towards it

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

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

Tags

NGSS.MS-PS2-4

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.

Tags

NGSS.MS-PS2-4

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

The table above shows the distance from the sun of some unknown planets of equal mass.

which of the following BEST explains which planet revolves at a FASTER speed?

• Planet X, because the sun pulls it with a greater force.

• Planet W, because the sun pulls it with a greater force

• Planet W, because the gravitational force is weakened by distance

• Planet X, because the gravitational force is strengthened by distance.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

NGSS.MS-PS2-5

The table above shows the distance from the sun of some unknown planets of equal mass.
Which of the following BEST explains which planet revolves at a SLOWER speed?

• Planet Y, because the sun pulls it with a greater force.

• Planet Z, because the sun pulls it with a greater force.

• Planet Y, because the gravitational force is weakened by distance.

• Planet Z, because the gravitational force is strengthened by distance.

Tags

NGSS.MS-ESS1-2