Astro 150 - Week 13

The gravitation potential energy of the planet at position 2 is _____ than it is at position 1, and the kinetic energy of the planet at position 2 is _____ than it is at 1.

• less, less

• less, more

• more, less

• more, more

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

In the Nebular Theory, as a slowly rotating gas cloud contracts gravitationally, conservation of ________ causes it to rotate faster and faster, and it gets hotter and hotter because the cloud loses ________.

• energy, kinetic energy

• linear momentum, kinetic energy

• spinning momentum, kinetic energy

• linear momentum, gravitational stored energy

• spinning momentum, gravitational stored energy

Tags

NGSS.HS-PS2-2

Imagine a giant nebula of cold gas as a sphere that is subdivided into lots of little mass blobs of gas. If an outside force pushes one blob closer to another blob, then the gravitational force between the two blobs will ______ .

• get weaker

• stay the same

• get stronger

Tags

NGSS.HS-PS2-4

As a nebula continues to collapse gravitationally, it becomes increasingly hotter and _____ toward its center until _______.

• denser, fusion stops the runaway collapse

• denser, a central black hole forms

• flatter, fusion stops the runaway collapse

• flatter, a central black hole forms

The new protoplanetary disk of leftover nebular material after the Sun’s birth is very hot. It is so hot that it begins as a pure gas disk with a composition of_____ percent Hydrogen and Helium?

• 100

• 99.8

• 99

• 98

• 90

The everyday process of changing H20 in gas form to a liquid (rain) or to a solid (snow or ice) state of matter is called

• evaporation

• condensation

• weather

• accretion

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

From which region(s) of the protoplanetary disk does the theory of planet formation predict that rock and metal solids can condense from the gas?

• only 1

• only 2 (Mercury to Mars orbits)

• only 3 (Jupiter and beyond orbits)

• both 2 and 3

• 1, 2, and 3

During the formation of major planets, the surviving solids ______ in number and _____ in average size

• decrease, decrease

• decrease, increase

• increase, increase

• increase, decrease

Before condensation, the gas in region 2 (Mercury to Mars orbits) is _____ composition and _____ than the gas in region 3 (Jupiter & beyond orbits).

• different, cooler

• the same, cooler

• different, warmer

• the same, warmer

Tags

NGSS.MS-PS1-1