Astrophysics Quiz 1

The average distance between the Sun and the Earth is called

• Astronomical unit

• Parsec

• Light year

• Parallax distance

Tags

NGSS.HS-ESS1-4

Apparent brightness of a star is defined as

• energy received per unit surface area

• energy received per second per unit surface area

• power received per second per unit surface area

• power received per second

The nuclear reaction that takes place in the core of the stars is

• Nuclear disposition

• Nuclear fission

• Nuclear fusion

• Nuclear composition

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

Stellar equilibrium means

• Radiation pressure inward is greater than gravitational push outward in a star

• Gravitational pull inward is greater than the radiation pressure outward in a star

• Radiation pressure outward is equal to the gravitational pull inward of a star

• Gravitational push outward is equal to the radiation pressure inward of a star

How do stars generate energy?

• Fusion of hydrogen to helium atoms

• Fission of hydrogen and helium atoms

• Fission of helium to hydrogen atoms

• Fusion of helium to hydrogen atoms

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

The Hertzprung Russell Diagram consists of two axis that are labelled...

• Luminosity and Size

• Luminosity and Temperature

• Age and Luminosity

• Temperature and Age

• Size and Temperature

Luminosity measures _____

• the size of a star

• the power radiated by a star

• the color of a star

• the age of a star

In the diagram shown, what happens to a star as it moves to the right?

• Stars get smaller

• Stars get hotter

• Stars get cooler

• Stars get brighter

• Stars get larger

Astronomers use ____________ to measure the distance from Earth to a nearby star.

• luminosity

• the parallax angle

• apparent brightness

• light years

Which of the following is the best description of stellar parallax?

• Stellar parallax is the power radiated per unit area and absolute temperature to the fourth power.

• Stellar parallax is the apparent motion of a nearby star compared to distant stars due to the 6 month change in the Earth's position.

• Stellar parallax says that surface temperature of a star is inversely proportional to the max power wavelength.

• Stellar parallax is the luminosity divided by the surface area of the sphere the light has expanded to.