Oswalt-Stars and Galaxies

The H-R diagram shows that main-sequence stars

• are mostly hot and dim

• are mostly cool and bright

• increase in brightness as they increase in temperature

• decrease in brightness as they increase in temperature

Supernovas occur when _______ forms in the core?

• nitrogen

• hydrogen

• helium

• iron

Tags

NGSS.HS-ESS1-3

Sunspots are dark regions on the visible surface of the sun. What is responsible for sunspots?

• the Sun's magnetic field

• solar flares

• fusion reactions in the Sun

• the gravitational force between the Earth and Sun

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What can be measured using parallax?

• the distance to all stars in our galaxy

• the distance to galaxies

• distances within our solar system

• the distance to stars within 100 light years

Which of these trips would take the longest?

• Earth to the Sun

• Earth to our moon

• Earth to the Orion constellation

• Earth to the farthest planet in our solar system

Tags

NGSS.MS-ESS1-3

Characteristics used to classify stars include:

• distance, size, and color

• size, distance, and brightness

• color, brightness, and distance

• size, brightness, and temperature

The absolute brightness of a star depends on which factors?

• the star's, temperature, size and distance

• the star's composition, size, and distance

• the star's temperature and size

• the star's composition, shape and temperature

A star is born when

• a nebula expands

• helium and oxygen combine

• nuclear fusion begins

• a protostar begins to cool

What are layers 1, 2, & 3 called in order?

• core, photosphere, convection zone

• core, radiation zone, convection zone

• core, convection zone, radiation zone

• photosphere, chromosphere, corona

Tags

NGSS.HS-ESS1-1

What is the largest layer of the Sun?

• the radiation zone

• the convection zone

• the corona

• the photosphere