Lesson 1 REVIEW: The Structure of the Solar System

An object that orbits the Sun, has a spherical shape, and has a mass greater than the mass of other objects near it is a(n)

• star

• planet

• asteroid

What keeps planets in orbit around the Sun?

• the Sun’s mass

• the Sun’s period of rotation

• the Sun’s gravitational force

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

The planets in the solar system are so far apart that scientists measure the distances between them in

• miles

• kilometers

• astronomical units

4. object made of gas, dust, and ice

• star

• period of rotation

• period of revolution

• comet

5. spherical objects made mainly of solid, rocky materials

• outer planets

• inner planets

• asteroids

• outer planets

6. small, rocky objects that orbit the Sun between Mars and Jupiter

• outer planets

• inner planets

• asteroids

• outer planets

7. large spherical objects made primarily of the gases hydrogen and helium

• outer planets

• inner planets

• asteroids

• meteorite

8. type of object at the center of the solar system

• meteoroid

• nebulae

• star

• crater

9.the time it takes an object to spin once

• prince and the revolution

• period of revolution

• astronomical unit

• period of rotation

10.the time it takes an object to travel around the Sun

• period of revolution

• orbit

• Sun's period of revolution

• planetary orbit

Tags

NGSS.MS-ESS1-2