ChatterBank1 min ago
Science Check My Answers Please
5 Answers
Why can certain stars sometimes be identified as eclipsing binary stars?
A. They are brighter than any single star.
B. They are all white dwarfs
C. They become dimmer at regular intervals.
D. They are cool red stars.
Which of the following is a major difference between elliptical galaxies and spiral galaxies?
A. Elliptical galaxies have almost no gas or dust between the stars.
B. Elliptical galaxies vary more in shape than spiral galaxies.
C. Spiral galaxies have almost no gas or dust between the stars.
D. Spiral galaxies contain only old stars.
Which of the following do all of the small objects in the four categories (dwarf planets, comets, asteroids, and meteoroids) have in common?
A. They all orbit the sun
B. They all have icy compositions
C. They are all less than a kilometer in diameter
D. They are all located in an asteroid belt
Which of the following small objects are made of ice and dust?
A. Asteroids
B. Comets
C. Meteors
D. Meteorites
If a scientist was trying to classify a star, and he had information on a star's size and brightness, which other factor would be helpful?
A. Color
B. Shape
C. Distance from the sun
D. Mass
A protostar has a high enough ___ to become a star.
A. Volume
B. Mass
C. Temperature
D. Brightness
From the cosmic background radiation, what can scientists infer that the universe was like after the big bang?
A. Very small
B. Hot
C. The same average temperature as it is today.
D. Cooler than it is today.
Which of the following possible outcomes regarding the overuse do scientists think is most likely ?
A. The universe will continue to expand
B. The universe has completed its expansion
C. The universe will start shrinking soon
D. The universe is already shrinking
Some constellations such as Ursa Minor, are visible in the sky year round other constellations appear for only part of the year.Explain why this happens.
How does a star's life began?
My answers:
1. C
2. A
3. C
4. B
5. A
6. A
7. B
8. A
9. Some constellations such as Ursa Minor, are visible in the sky year round other constellations appear for only part of the year.Explain why this happens.
10. All stars form from two key factors: the presence of material which can condense into a solid mass, and gravity, the force which results in the compaction of the material. New stars are essentially formed from old stars which have exploded or died out and have become stardust. When this stardust accretes (becomes condensed) again, the temperature increases, and when the proper conditions are present, a nuclear "furnace" can be the result. In the furnaces within stars, atoms are fused together. Fusion is the process where, under extreme heat and temperature, atoms combine and give off byproducts. This process creates the heat, light, and other particle emissions we experience from our own Sun, which is 93 million miles away from Earth, and considered to be a "main sequence" or somewhat "typical" star, at least as to here in our Milky Way Galaxy, which is thought to contain hundreds of millions of stars.
A. They are brighter than any single star.
B. They are all white dwarfs
C. They become dimmer at regular intervals.
D. They are cool red stars.
Which of the following is a major difference between elliptical galaxies and spiral galaxies?
A. Elliptical galaxies have almost no gas or dust between the stars.
B. Elliptical galaxies vary more in shape than spiral galaxies.
C. Spiral galaxies have almost no gas or dust between the stars.
D. Spiral galaxies contain only old stars.
Which of the following do all of the small objects in the four categories (dwarf planets, comets, asteroids, and meteoroids) have in common?
A. They all orbit the sun
B. They all have icy compositions
C. They are all less than a kilometer in diameter
D. They are all located in an asteroid belt
Which of the following small objects are made of ice and dust?
A. Asteroids
B. Comets
C. Meteors
D. Meteorites
If a scientist was trying to classify a star, and he had information on a star's size and brightness, which other factor would be helpful?
A. Color
B. Shape
C. Distance from the sun
D. Mass
A protostar has a high enough ___ to become a star.
A. Volume
B. Mass
C. Temperature
D. Brightness
From the cosmic background radiation, what can scientists infer that the universe was like after the big bang?
A. Very small
B. Hot
C. The same average temperature as it is today.
D. Cooler than it is today.
Which of the following possible outcomes regarding the overuse do scientists think is most likely ?
A. The universe will continue to expand
B. The universe has completed its expansion
C. The universe will start shrinking soon
D. The universe is already shrinking
Some constellations such as Ursa Minor, are visible in the sky year round other constellations appear for only part of the year.Explain why this happens.
How does a star's life began?
My answers:
1. C
2. A
3. C
4. B
5. A
6. A
7. B
8. A
9. Some constellations such as Ursa Minor, are visible in the sky year round other constellations appear for only part of the year.Explain why this happens.
10. All stars form from two key factors: the presence of material which can condense into a solid mass, and gravity, the force which results in the compaction of the material. New stars are essentially formed from old stars which have exploded or died out and have become stardust. When this stardust accretes (becomes condensed) again, the temperature increases, and when the proper conditions are present, a nuclear "furnace" can be the result. In the furnaces within stars, atoms are fused together. Fusion is the process where, under extreme heat and temperature, atoms combine and give off byproducts. This process creates the heat, light, and other particle emissions we experience from our own Sun, which is 93 million miles away from Earth, and considered to be a "main sequence" or somewhat "typical" star, at least as to here in our Milky Way Galaxy, which is thought to contain hundreds of millions of stars.
Answers
1 to 5 of 5
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Be fair, Goodgoalie. The questioner has tried to answer the questions on their own and is only asking us to check those answers. That seems like an excellent approach to studying to me.
Of those answers, I agree with 1, 2, 4, 5, 7, 8 & 10.
For Q3, answer C is clearly incorrect because Ceres has a diameter of around 950km and Pluto's diameter is over 2000km. However everything in the list orbits the Sun, so the required answer is A.
For Q6, it's not the volume of a celestial body which is important. For example, a gaseous body could occupy a great deal of space without there being very much of it. It's that 'how much of it' factor, which is important, i.e. the mass (Answer B)
This might help with Q9 (because you've only copied the question in your post, rather than providing an answer):
https:/
Of those answers, I agree with 1, 2, 4, 5, 7, 8 & 10.
For Q3, answer C is clearly incorrect because Ceres has a diameter of around 950km and Pluto's diameter is over 2000km. However everything in the list orbits the Sun, so the required answer is A.
For Q6, it's not the volume of a celestial body which is important. For example, a gaseous body could occupy a great deal of space without there being very much of it. It's that 'how much of it' factor, which is important, i.e. the mass (Answer B)
This might help with Q9 (because you've only copied the question in your post, rather than providing an answer):
https:/
1st section answer is C
2nd section B or C not sure, but all Galaxies contain gas and dust
3rd section A
4th section B
5th section C
6th section B
7th section B
8th section A
I think you have 9 and 10 about correct but not certain.
Sorry if I'm wrong but it's difficult scrolling up and down to keep checking the question against your answers.
2nd section B or C not sure, but all Galaxies contain gas and dust
3rd section A
4th section B
5th section C
6th section B
7th section B
8th section A
I think you have 9 and 10 about correct but not certain.
Sorry if I'm wrong but it's difficult scrolling up and down to keep checking the question against your answers.
1 to 5 of 5
