Unit 2 hope for makeup points

Felix examined several photos of stars. To compare their temperatures, he looked at the colors of the stars. He organized the photos in order from coolest to hottest. Which of these answers shows the correct order?

• red, yellow, white, blue

• white, blue, yellow, red

• yellow, white, blue, red

• blue, yellow, white, red

Which of the following statements best relates a star’s color to its surface temperature?

• blue stars have a relatively low temperature

• red stars have a relatively high temperature

• blue-white stars have a relatively low temperature

• yellow stars have a relatively low temperature

Absolute magnitude is defined as…

• mass of a star

• color of a star

• brightness of a star, as it appears from Earth

• brightness of a star independent from the distance of Earth

About 90 percent of the stars in the universe, including the sun, are main sequence stars. What do all main sequence stars have in common?

• All main sequence stars are yellow like our sun.

• All main sequence stars are as bright as our sun.

• They are all undergoing fusion of helium into carbon within their cores

• They are undergoing fusion of hydrogen into helium within their cores

Which of the following correctly ranks astronomical objects by size, starting with the smallest?

• earth, sun, solar system, galaxy, universe

• sun, solar system, earth, universe, galaxy

• universe, galaxy, solar system, earth, sun

• solar system, earth, sun, universe, galaxy

A light year is a measurement of:

• Time
• Distance
• Gravity
• None of the Above

Explosion of a high-mass star.

• White Dwarf
• Planetary Nebula
• Supernova
• Neutron Star

An object whose gravity is so strong that nothing can escape.

• Planetary Nebula
• Supernova
• Neutron Star
• Black Hole

Stars are made of mostly which two gases?

• Hydrogen and Helium

• Hydrogen and Oxygen

• Hydrogen and Nitrogen

• Hydrogen and Carbon

A star is born in a cloud of gas and dust called a __________.

• nebula

• galaxy

• asteroid

• black hole