The statement that is part of the Big Bang Theory is:
"the universe began as a very high density singularity."
This describes the initial state of the universe before it began to expand.
Which statement is part of the Big Bang Theory?(2 points)
Responses
The chemical makeup of the universe has changed dramatically
The chemical makeup of the universe has changed dramatically
the universe began as a very high density singularity
the universe began as a very high density singularity
Dark matter makes up the majority of matter in the galaxy.
Dark matter makes up the majority of matter in the galaxy.
Small spiral galaxies become larger elliptical galaxies
9 answers
Which statement is correct about nuclear FISSION?(1 point)
Responses
nuclear fission occurs in the nuclei of atoms
nuclear fission occurs in the nuclei of atoms
nuclear fission is commonly fueled by iron
nuclear fission is commonly fueled by iron
Nuclear fission occurs when two atoms slam together to form one, heavier atom
Nuclear fission occurs when two atoms slam together to form one, heavier atom
Nuclear fission only occurs in stars.
Responses
nuclear fission occurs in the nuclei of atoms
nuclear fission occurs in the nuclei of atoms
nuclear fission is commonly fueled by iron
nuclear fission is commonly fueled by iron
Nuclear fission occurs when two atoms slam together to form one, heavier atom
Nuclear fission occurs when two atoms slam together to form one, heavier atom
Nuclear fission only occurs in stars.
The correct statement about nuclear fission is:
"nuclear fission occurs in the nuclei of atoms."
Nuclear fission is the process where the nucleus of an atom splits into two or more smaller nuclei, along with the release of energy. It does not involve iron as a primary fuel and is different from nuclear fusion, which is the process that occurs in stars.
Which statement is TRUE about nuclear FUSION?(1 point)
Responses
Nuclear fusion only releases a small amount of energy.
Nuclear fusion only releases a small amount of energy.
Nuclear fusion is used to provide electricity at nuclear power plants
Nuclear fusion is used to provide electricity at nuclear power plants
Nuclear fusion occurs when two atoms slam together to form one, heavier atom
Nuclear fusion occurs when two atoms slam together to form one, heavier atom
Nuclear fusion is when atoms split apart
Responses
Nuclear fusion only releases a small amount of energy.
Nuclear fusion only releases a small amount of energy.
Nuclear fusion is used to provide electricity at nuclear power plants
Nuclear fusion is used to provide electricity at nuclear power plants
Nuclear fusion occurs when two atoms slam together to form one, heavier atom
Nuclear fusion occurs when two atoms slam together to form one, heavier atom
Nuclear fusion is when atoms split apart
The true statement about nuclear fusion is:
"Nuclear fusion occurs when two atoms slam together to form one, heavier atom."
This process involves the merging of lighter atomic nuclei to form a heavier nucleus, releasing a significant amount of energy in the process.
Which is evidence for the existence of dark energy?(1 point)
Responses
Pulsars that seem to be moving closer at an accelerating rate
Pulsars that seem to be moving closer at an accelerating rate
galaxies that are rotating at a constant rate
galaxies that are rotating at a constant rate
Black holes that are expanding at a constant rate
Black holes that are expanding at a constant rate
Supernovae that are moving away at an accelerating rate
Responses
Pulsars that seem to be moving closer at an accelerating rate
Pulsars that seem to be moving closer at an accelerating rate
galaxies that are rotating at a constant rate
galaxies that are rotating at a constant rate
Black holes that are expanding at a constant rate
Black holes that are expanding at a constant rate
Supernovae that are moving away at an accelerating rate
The evidence for the existence of dark energy is:
"Supernovae that are moving away at an accelerating rate."
Observations of distant supernovae have shown that they are receding from us at an increasing velocity, which suggests the presence of dark energy driving the accelerated expansion of the universe.
Which characteristic is shared by both dark matter and baryonic matter?(1 point)
Responses
They both have been directly observed by scientists
They both have been directly observed by scientists
They both are capable of absorbing light
They both are capable of absorbing light
They both have gravity
They both have gravity
They both interact with each other
Responses
They both have been directly observed by scientists
They both have been directly observed by scientists
They both are capable of absorbing light
They both are capable of absorbing light
They both have gravity
They both have gravity
They both interact with each other
The characteristic that is shared by both dark matter and baryonic matter is:
"They both have gravity."
Both types of matter exert gravitational forces, which is why dark matter's presence is inferred through its gravitational effects on visible matter, radiation, and the large-scale structure of the universe.
1 answer