6th Grade Unit 8 Lesson 1 & 2 Gravity and the Solar System

An astronomer observes four stars from two different locations on Earth. For which star has the greatest parallax?

• the star that is 3.4 AU from Earth

• the star that is 4.2 AU from Earth

• the star that is 6.8 AU from Earth

Which term describes the apparent shift in the position of an object when a person views it from different locations?

• ellipses

• parallax

• axis of rotation

This diagram illustrates an historical model of the solar system.Which type of model is shown?

• geocentric model

• heliocentric model

• Aristarchan model

Tags

NGSS.MS-ESS1-1

What is Kepler’s second law?

• states that planetary orbits are ellipses with the sun at one focus.

• states planets move faster in their orbits when they are closer to the sun.

• relates the distance from the sun to time planet takes to go once around it

What is Kepler’s third law?

• states that planetary orbits are ellipses with the sun at one focus.

• states planets move faster in their orbits when they are closer to the sun.

• distance of planet from Sun to time planet takes to go once around it

Which of these choices states Kepler’s first law of planetary motion?

• The planet sweeps out equal areas in equal amounts of time.

• The orbit of a planet or other body around the sun is an ellipse

• The square of planet’s orbital period is proportional to planet’s distance

What role did gravity play in forming the sun?

• Gravity turned the protoplanetary disk into a planetesimal

• Gravity turned the protoplanetary disk into a rotating solar nebula

• Gravity caused solar nebula to collapse causing the sun to be dense and hot

Create a timeline of the formation of the solar system. Which sequence best describes the formation of the solar system?

• nebula → protostellar disk → nuclear fusion → sun → planetesimals → planets

• nebula → protostellar disk → nuclear fusion → planetesimals → planets → sun

• protostellar disk → nuclear fusion → sun → nebula → planetesimals → planets

Tags

NGSS.MS-ESS1-2

What are the 2 things that determine the force of gravity?

• Mass and distance

• Density and time

• Mass and weight

Tags

NGSS.MS-PS2-4

A galaxy contains stars, gas, and dust. What is responsible for holding the stars, gas, and dust together in a galaxy?

• heat

• light

• gravity

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4