Discovering New Worlds Review

The star Rho Cassiopeiae has a surface temperature of 5200 K and a luminosity (relative to the Sun) of 400,000.

Use an X to plot the position of Rho Cassiopeiae on the Characteristics of Stars graph, based on its surface temperature and luminosity.

The planets are shown in their relative order of distance from the Sun.

Identify the process that occurs within the Sun that converts mass into large amounts of energy.

Tags

NGSS.HS-ESS1-1

Compared to the orbit of the planets, the orbit of Halley's comet is...

• less elliptical, with a shorter distance between its foci

• less elliptical, with a greater distance between its foci

• more elliptical, with a shorter distance between its foci

• more elliptical, with a greater distance between its foci

Tags

NGSS.HS-ESS1-4

The flowchart shows the evolution of stars.

Identify the force responsible for the contraction of a nebula (a gas cloud of molecules) to form a protostar.

Which characteristics best describe the star Betelgeuse?

• reddish orange with low luminosity and high surface temperature

• reddish orange with high luminosity and low surface temperature

• blue white with low luminosity and low surface temperature

• blue white with high luminosity and high surface temperature

The diagram represents Earth’s revolution around the Sun. Points A, B, C, and D represent Earth’s positions in its orbit on the first day of each of the four seasons. The major axis and the foci (the center of the Sun and the other focus) of Earth’s orbit are shown.

Since Earth has an elliptical orbit, the...

• distance between the Sun and Earth varies

• distance between the Sun and the other focus varies

• length of Earth’s major axis varies

• length of Earth’s period of revolution varies

Tags

NGSS.HS-ESS1-4

Identify two stars from the Characteristics of Stars graph that are in the same life-cycle stage as the Sun.

Tags

NGSS.HS-ESS1-1

Which characteristic of the star Spica causes it to have a greater luminosity than Barnard’s Star?

The diagram represents two possible sequences in the evolution of stars.

Which table includes data that are characteristic of the surface temperature and luminosity of some white dwarf stars?

• Surface Temperature 5000 K, Luminosity 100

• Surface Temperature 10,000 K, Luminosity 100

• Surface Temperature 5000 K, Luminosity 0.001

• Surface Temperature 10,000 K, Luminosity 0.001

According to the diagram, the life-cycle path followed by a star is determined by the star’s initial...

• mass and size

• temperature and origin

• luminosity and color

• luminosity and structure

Tags

NGSS.HS-ESS1-3