1. What color are stars that are very hot and very bright?
A. Red
B. Blue
C. White
D. Yellow
2. During the contraction of a protostar, density increases and ______ rises.
A. Nuclear energy
B. Dust
C. Temperature
D. Outflow
3. What is the apparent brightness of a star?
A. How bright the star looks from earth
B. The amount of watts the star produces
C. The amount of luminosity that the star has
D. How bright the star is at a certain distance from earth
4. What two properties of a star are graphed on a Hertzsprung-Russell diagram?
A. Distance and luminosity
B. Temperature and brightness
C. Brightness and luminosity
D. Distance and temperature
5. As a star forms, at what point do nuclear reactions begin to occur?
A. When the protostar begins spinning
B. When the molecule cloud begins contracting
C. When the temperature increases to 10 million Kelvin
D. When the pressure of the gases equals the force of gravity
6. Astronomers measure the angle that the star appears to jump when viewing it from two different points in earths orbit. What is this technique called?
A. Parsecs
B. Parallax
C. Luminosity
D. Mass transfer
7. Which cool and bright stars are located in the upper right of the H-R diagram?
A. Red giants
B. Neutron stars
C. White dwarfs
D. Main sequence
8. Stars form when a(n) ________ collapses under its own weight.
A. Lunar rock
B. Interstellar medium
C. Molecular cloud
D. Planetesimal
9. What properties of a star are needed to calculate the stars luminosity?
A. Size and apparent brightness
B. Mass and distance to the star
C. Temperature and diameter of the star
D. Apparent brightness and distance to the star
10. How can the temperature of a star be determined?
A. From its mass
B. From its color
C. From its mass and distance
D. From its apparent brightness
8 answers
1. B
2. C
3. C
4. C
5. C
6. C
7. A
8. D
9. D
10. B
I am terrible at Astronomy. I just find everything very confusing. Please check my answers
2. C
3. A
4. B
5. C
6. B
7. A
8. C
9. D
10. B
Just took this test and combined your answers with mine and got 100% Hope this helps :D
[Parallax]
2. What color are stars that are very hot and very bright?
[Blue]
3. During the contraction of a protostar, density increases and ______ rises?
[Temperature]
4. What properties of a star are needed to calculate the stars luminosity?
[Apparent brightness and distance to the star]
5. What is the apparent brightness of a star?
[How bright the star looks from earth]
6. How can the temperature of a star be determined?
[From its color]
7. What two properties of a star are graphed on a Hertzsprung-Russell diagram?
[Temperature and brightness]
8. Which cool and bright stars are located in the upper right of the H-R diagram?
[Red giants]
9. Stars form when a(n) ________ collapses under its own weight.
[Molecular cloud ]
10. As a star forms, at what point do nuclear reactions begin to occur?
[When the temperature increases to 10 million Kelvin]
1.C
2.B
3.B
4.C
5.A
6.D
7.B
8.A
I will simplify them to make them easier to read.
1.D
2.C
3.A
4.C
5.A
6.B
7.B
8.C
9.B
10.B
This is for intro to Astronomy Connections Academy
7 answers