5 Questions
Which subatomic particle is different in isotopes of an element?
Neutrons
According to which law is the red shift directly proportional to the distance and speed of a star moving away from the observer?
Hubble's Law
What event explained the origin of the universe as a singularity that exploded into a cloud of gas?
Big Bang
What was the composition of the universe after a few minutes of the Big Bang?
75% hydrogen, 25% helium, trace amounts of lithium
Which one of the following statements is NOT true about nuclear reactions?
Nuclear reactions are not influenced by subatomic particles
Study Notes
Elements and Isotopes
- An element with the same number of protons but different number of neutrons is described as an isotope.
Astronomy Laws
- Hubble's Law states that the size of the red shift is directly proportional to the distance and speed of a star moving away from the observer on Earth.
Origins of the Universe
- The Big Bang theory explains the origin of the universe from a singularity that exploded into a cloud of gas.
Composition of the Universe
- After a few minutes of the Big Bang, the universe was composed of 75% hydrogen, 25% helium, and trace amounts of lithium.
Nuclear Reactions
- Nuclear reactions do not involve the emission of radioactive particles of an atom.
Test your knowledge of Physical Science with this review quiz based on multiple-choice questions. Practice identifying elements, isotopes, and nuclear fusion concepts. Choose the correct answer for each question to assess your understanding.
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