Log in
Sign up for FREE
arrow_back
Library

2.08 Unit 2 Test 25-26

star
star
star
star
star
Last updated about 2 hours ago
23 questions
Required
3
HS-ESS1-1
Required
3
Required
3
HS-ESS1-1
Required
3
HS-ESS1-1
Required
3
HS-ESS1-3
Required
3
Required
3
HS-ESS1-2
HS-ESS1-3
Required
2
HS-ESS1-1
Required
2
HS-ESS1-1
HS-ESS1-3
Required
3
HS-ESS1-3
Required
3
HS-ESS1-3
Required
2
HS-ESS1-3
Required
2
HS-ESS1-1
Required
3
HS-ESS1-1
Required
3
HS-ESS1-1
Required
3
HS-ESS1-1
Required
3
HS-ESS1-1
Required
3
HS-ESS1-1
Required
3
HS-ESS1-1
Required
3
Required
0
Required
0
Question 1
1.

Question 2
2.

Question 3
3.

Question 4
4.

Question 5
5.

Question 6
6.

Question 7
7.

Question 8
8.

Question 9
9.
During nuclear fusion, stars fuse __________ into __________
Question 10
10.

Question 11
11.

Question 12
12.

Question 13
13.

Question 14
14.

Question 15
15.

Question 16
16.

Question 17
17.

Question 18
18.

Question 19
19.

Question 20
20.

Required
4
Question 21
21.

The astronomer Carl Sagan famously said, "The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of star stuff."

In your own words, what does it mean to say we are made of "star stuff"?

HS-ESS1-3
Question 22
22.

Question 23
23.

What parts of this unit did you enjoy?

Whats parts of this unit could be improved?

Where would expect to find the majority of stars on the Hertzsprung-Russel diagram?
Red giants
Main sequence
Red supergiants
White dwarfs
Where are stars "born"?
Supernova
Supergiant
Nebula
Black hole
Order the following stars from coolest to hottest.

Star A, Star C, Star B
Star C, Star B, Star A
Star B, Star A, Star C
Star A, Star B, Star C
Which one of these stars would be the least bright if they were all the same distance from the Earth?

Star C
Star A
They would all have equal brightness
Star B
Which of the following elements is/are represented in the star's spectrum below?
Helium only
Hydrogen and helium
Hydrogen only
Calcium only
Which process powers stars?
Chemical reactions
Nuclear fission
Nuclear fusion
Redox reactions
The spectrum of a distant star contains sodium lines that have shifted from their normal position towards the red end of the visible light spectrum, as shown. What is the most likely explanation?
The star is getting hotter
The star is moving towards Earth
The star is moving away from Earth
The star is getting colder
Which stars will use up their fuel much more quickly?
High mass
Low mass
What is apparent magnitude?
A star's actual brightness
A star’s brightness as seen from an observer
The movement of a star away from the earth
The lifecycle of a star
How do white dwarfs compare with supergiants, in terms of temperature and luminosity?
White dwarfs are hotter but not as bright as supergiants
White dwarfs are cooler but not as bright as supergiants
White dwarfs are cooler and brighter than supergiants
White dwarfs are hotter and brighter than supergiants
Low mass stars can fuse elements all the way up to Iron (Fe).
True
False
Low mass stars have a longer lifetime that high mass stars.
True
False

Stars A and B appear to have the same brightness from Earth, but Star B is much smaller than Star A. Which of the following must be true?
Star A is closer to Earth
Star B is closer to Earth
They are the same distance from Earth
There is no way to tell their distance
What do low mass stars spend the ends of their lives as?
White dwarfs
Protostars
Red giants
Supernova
What do high mass stars spend the ends of their lives as?
Red giants
Protostars
White dwarfs
Supernova
What are young stars that have not yet begun nuclear fusion?
Protostars
White dwarfs
Red giants
Supernova
What state of matter is the sun (and other stars) made of?
Plasma
Liquid
Gas
Solid
What will the Sun become when it runs out of hydrogen and begins fusing helium into carbon and oxygen?
protostar
red giant
white dwarf
supernova
Which of the following describes the Sun?
Red giant
High mass
Low mass
Medium temperature
High temperature
White dwarf
Low temperature
Main sequence
Now that we have completed Unit 2, please rate yourself on the Unit 2 objectives from 1 (just starting) to 5 (mastered it!)

You may need to scroll horizontally to see all options
1 - getting started
2
3
4
5 - mastered it
Describe the composition and characteristics of stars
Analyze and characterize stars by their physical and chemical properties
Analyze the evidence that supports the Big Bang theory
Explain the use of diagrams and models in obtaining physical data on stars
  1. Examine the evolution of stars