Lesson 6.6 Life Cycle of Stars

Question 1

What makes stars produce energy?

Revolt · Accepted Answer

nuclear fusion

Question 2

Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun. Rigel has a surface temperature of about .

Revolt · Accepted Answer

a higher temperature than

Question 3

Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun. Rigel has a surface temperature of about .

Revolt · Accepted Answer

11,000 K

Question 4

Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun. Rigel has a surface temperature of about .

Revolt · Accepted Answer

bigger than; Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun.: bigger than; Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun.: a higher temperature than; Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun.: 11,000 K

Question 5

The of light is the rate at which light travels through empty space, or about 300,000 km per second.

Revolt · Accepted Answer

speed; The of light is the rate at which light travels through empty space, or about 300,000 km per second.: speed; A light-year is a measurement of .: distance; The distance between stars is measured in light-years rather than in miles or kilometers because the distance between stars .: is very large

Question 6

Why can’t astronomers take a picture from inside a black hole?

Revolt · Accepted Answer

Gravity is so strong that even light cannot escape a black hole.

Question 7

Complete the paragraph to describe the characteristics of the Sun and Rigel, a blue-white supergiant.

Revolt · Accepted Answer

bigger than; Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun.: bigger than; Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun.: a higher temperature than; Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun.: 11,000 K

Question 8

Which statement describes absolute and apparent brightness?

Revolt · Accepted Answer

Absolute brightness is the actual amount of light produced by the star, whereas apparent brightness changes with distance from the observer.

Question 9

1000 K✔ 3000 K5000 K

Revolt · Accepted Answer

✔ 3000 K

Question 10

Use the drop-down menus to complete the statements.

Revolt · Accepted Answer

✔ speed; The of light is the rate at which light travels through empty space, or about 300,000 km per second.: speed; A light-year is a measurement of .: distance; The distance between stars is measured in light-years rather than in miles or kilometers because the distance between stars .: is very large

Lesson 6.6 Life Cycle of Stars Answers

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