10 Questions
What is the term for a ratio of size in a map or model?
Scale
What is the primary composition of a star?
Hydrogen and helium
What is the force that pulls two objects toward each other?
Gravity
What is the process by which atomic nuclei combine to form a heavier nucleus?
Nuclear fusion
What is the fastest known speed in the universe?
Speed of light
What happens to the temperature of the gas as it is compressed?
It increases
What is the result of a massive star forming a supergiant and then exploding?
A black hole is formed
What is formed when a star has no more hydrogen left and starts fusing larger atoms?
A red giant
What is the state of the remaining material after a massive star explodes?
Very dense and can either form a black hole or a neutron star
What is the final stage of a star's life cycle?
Black dwarf
Study Notes
Scale
- Refers to the ratio of size in a map or model, representing a smaller version of something larger
Stars
- A ball of hot gas, primarily composed of hydrogen and helium
- Undergoes nuclear fusion, releasing energy in the form of light waves
- Nuclear fusion is a reaction where atomic nuclei combine to form a heavier nucleus, releasing energy
Gravity
- A natural force that attracts two objects towards each other
Energy and Mass
- Energy is equivalent to mass times the speed of light squared (E=mc²)
- Mass is a measure of the amount of matter in an object
Speed of Light
- The fastest known speed in the universe
- A fundamental constant in physics
Atomic Nuclei
- The building blocks of matter
- Consist of protons and neutrons bound together in the nucleus of an atom
Test your knowledge of astronomy fundamentals, including scales, stars, and nuclear reactions. Learn about the life cycle of stars, nuclear fusion, and more.
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