Which statement about nuclear fission is correct?(1 point)
Responses
The fuel for nuclear fission is often helium.
The fuel for nuclear fission is often helium.
Nuclear fission takes place in the nucleus of atoms.
Nuclear fission takes place in the nucleus of atoms.
Nuclear fission is used to generate water at nuclear power plants.
Nuclear fission is used to generate water at nuclear power plants.
Nuclear fission releases small amount of energy.
19 answers
Nuclear fission releases small amount of energy.
The stars at the edges of a galaxy are rotating around the galaxy’s center at the same speed as the stars in the middle of the galaxy. How does this provide evidence of dark matter?(1 point)
Responses
Dark matter provides the gravity that allows the stars to rotate at the same speed.
Dark matter provides the gravity that allows the stars to rotate at the same speed.
Dark matter emits the light that astronomers need to see the orbital speeds of the stars.
Dark matter emits the light that astronomers need to see the orbital speeds of the stars.
Dark matter absorbs light from outside the galaxy, allowing the light of the stars in the galaxy to show the orbital speeds of the stars.
Dark matter absorbs light from outside the galaxy, allowing the light of the stars in the galaxy to show the orbital speeds of the stars.
Dark matter subtracts gravity, which allows the stars to rotate at the same speed.
Responses
Dark matter provides the gravity that allows the stars to rotate at the same speed.
Dark matter provides the gravity that allows the stars to rotate at the same speed.
Dark matter emits the light that astronomers need to see the orbital speeds of the stars.
Dark matter emits the light that astronomers need to see the orbital speeds of the stars.
Dark matter absorbs light from outside the galaxy, allowing the light of the stars in the galaxy to show the orbital speeds of the stars.
Dark matter absorbs light from outside the galaxy, allowing the light of the stars in the galaxy to show the orbital speeds of the stars.
Dark matter subtracts gravity, which allows the stars to rotate at the same speed.
Dark matter provides the gravity that allows the stars to rotate at the same speed.
Drag and drop the words into the correct locations. (2 points)
Three pieces of evidence of universe expansion support the Big Bang Theory. The first piece of evidence, which Edwin Hubble discovered, is that [answer]. The second piece of evidence is the change in universal temperature. The temperature [answer]. The third piece of evidence is that Cosmic Microwave Background radiation is found [answer].
Answer Bank: has increased dramatically, has decreased dramatically, galaxies are moving away from eachother, uniformly across the universe, galaxies are moving towards each other
Three pieces of evidence of universe expansion support the Big Bang Theory. The first piece of evidence, which Edwin Hubble discovered, is that [answer]. The second piece of evidence is the change in universal temperature. The temperature [answer]. The third piece of evidence is that Cosmic Microwave Background radiation is found [answer].
Answer Bank: has increased dramatically, has decreased dramatically, galaxies are moving away from eachother, uniformly across the universe, galaxies are moving towards each other
Three pieces of evidence of universe expansion support the Big Bang Theory. The first piece of evidence, which Edwin Hubble discovered, is that galaxies are moving away from each other. The second piece of evidence is the change in universal temperature. The temperature has decreased dramatically. The third piece of evidence is that Cosmic Microwave Background radiation is found uniformly across the universe.
Which statements about nuclear fission and nuclear fusion are true? Select the two correct answers. (1 point)
Responses
They both release large amounts of energy.
They both release large amounts of energy.
They both involve two atoms fusing into one atom.
They both involve two atoms fusing into one atom.
They both involve one atom splitting into two atoms.
They both involve one atom splitting into two atoms.
They both occur in the nucleus of an atom.
Responses
They both release large amounts of energy.
They both release large amounts of energy.
They both involve two atoms fusing into one atom.
They both involve two atoms fusing into one atom.
They both involve one atom splitting into two atoms.
They both involve one atom splitting into two atoms.
They both occur in the nucleus of an atom.
They both release large amounts of energy.
They both occur in the nucleus of an atom.
They both occur in the nucleus of an atom.
How is gravitational lensing related to dark matter?(1 point)
Responses
The gravity of dark matter absorbs light from distant sources.
The gravity of dark matter absorbs light from distant sources.
Dark matter uses gravitational lensing to create dark energy.
Dark matter uses gravitational lensing to create dark energy.
The gravity of dark matter distorts light from distant sources.
The gravity of dark matter distorts light from distant sources.
Dark matter emits lens-shaped rings of light.
Responses
The gravity of dark matter absorbs light from distant sources.
The gravity of dark matter absorbs light from distant sources.
Dark matter uses gravitational lensing to create dark energy.
Dark matter uses gravitational lensing to create dark energy.
The gravity of dark matter distorts light from distant sources.
The gravity of dark matter distorts light from distant sources.
Dark matter emits lens-shaped rings of light.
The gravity of dark matter distorts light from distant sources.
Drag and drop the words into the correct locations.(2 points)
Dark [answer] is the only explanation for the structures of the early universe. Clumps of it led to [answer] in the early universe. Without it, the universe would have [answer].
Answers: energy, matter, collapsed inward, formation of galaxies, remained uniform
Dark [answer] is the only explanation for the structures of the early universe. Clumps of it led to [answer] in the early universe. Without it, the universe would have [answer].
Answers: energy, matter, collapsed inward, formation of galaxies, remained uniform
Dark matter is the only explanation for the structures of the early universe. Clumps of it led to the formation of galaxies in the early universe. Without it, the universe would have remained uniform.
Which correctly relate dark matter and dark energy to the Big Bang theory? Select the two correct answers.(1 point)
Responses
Because of dark matter, gravitational interactions cause galaxies to develop.
Because of dark matter, gravitational interactions cause galaxies to develop.
Dark energy is the source of 25 percent of the mass of the universe.
Dark energy is the source of 25 percent of the mass of the universe.
Through dark energy, the universe is expanding at a faster and faster rate.
Through dark energy, the universe is expanding at a faster and faster rate.
Without dark energy, structures in the early universe would never have developed.
Responses
Because of dark matter, gravitational interactions cause galaxies to develop.
Because of dark matter, gravitational interactions cause galaxies to develop.
Dark energy is the source of 25 percent of the mass of the universe.
Dark energy is the source of 25 percent of the mass of the universe.
Through dark energy, the universe is expanding at a faster and faster rate.
Through dark energy, the universe is expanding at a faster and faster rate.
Without dark energy, structures in the early universe would never have developed.
Because of dark matter, gravitational interactions cause galaxies to develop.
Through dark energy, the universe is expanding at a faster and faster rate.
Through dark energy, the universe is expanding at a faster and faster rate.
How does the proportion of hydrogen and helium in the universe support the Big Bang theory?(1 point)
Responses
It is the proportion predicted to be present in the early universe.
It is the proportion predicted to be present in the early universe.
it shows that only simple elements are present in the universe.
it shows that only simple elements are present in the universe.
It proves that matter must be formed under high temperatures.
It proves that matter must be formed under high temperatures.
It demonstrates the rate of expansion predicted by the theory.
Responses
It is the proportion predicted to be present in the early universe.
It is the proportion predicted to be present in the early universe.
it shows that only simple elements are present in the universe.
it shows that only simple elements are present in the universe.
It proves that matter must be formed under high temperatures.
It proves that matter must be formed under high temperatures.
It demonstrates the rate of expansion predicted by the theory.
It is the proportion predicted to be present in the early universe.
What type of evidence does cosmic background radiation provide about the origins of the universe?(1 point)
Responses
It supports predictions of the composition of the early universe.
It supports predictions of the composition of the early universe.
It pinpoints the size of the original universe.
It pinpoints the size of the original universe.
It proves that the universe is expanding.
It proves that the universe is expanding.
It verifies that the early universe was once extremely hot.
Responses
It supports predictions of the composition of the early universe.
It supports predictions of the composition of the early universe.
It pinpoints the size of the original universe.
It pinpoints the size of the original universe.
It proves that the universe is expanding.
It proves that the universe is expanding.
It verifies that the early universe was once extremely hot.
It verifies that the early universe was once extremely hot.
Question 1 is incorrect.
Nuclear fission releases small amount of energy is the correct answer, however, the answer given here is incorrect.
Nuclear fission releases small amount of energy is the correct answer, however, the answer given here is incorrect.
Apologies for the incorrect response. You are correct that nuclear fission releases a large amount, not a small amount, of energy. Thank you for pointing out the error.
1 answer