Physics Flashcards
What is the universe?
The universe is all of space and time, including all matter and energy.
What is a galaxy?
A galaxy is a massive system of stars, stellar remnants, interstellar gas, dust, and dark matter.
What is the name of our galaxy?
The name of our galaxy is the Milky Way.
What is a light-year?
A light-year is the distance that light travels in one year.
What is the observable universe?
The observable universe is the part of the universe that we can see from Earth.
What is the Big Bang Theory?
the universe began as an infinitely small, hot, and dense point, which rapidly expanded and continued to stretch over 13.8 billion years.
When did the Big Bang happen?
The Big Bang happened approximately 13.8 billion years ago.
What evidence supports the Big Bang?
Evidence includes cosmic microwave background radiation and the abundance of light elements.
What is redshift?
Redshift is the phenomenon where light from an object is shifted to longer wavelengths as it moves away.
What is cosmic inflation?
Cosmic inflation is a theory that proposes a rapid expansion of the universe right after the Big Bang.
What is a nebula?
A nebula is a giant cloud of dust and gas in space.
What is a protostar?
A protostar is an early stage in the formation of a star.
What is a main sequence star?
A main sequence star is a star that is in the stable phase of hydrogen burning.
What happens when a star runs out of fuel?
When a star runs out of fuel, it undergoes changes that can lead to its death.
What are the final stages of a star?
The final stages of a star can include becoming a red giant, supernova, neutron star, or black hole.
What is a satellite?
A satellite is an object that orbits a planet or another celestial body.
What are artificial satellites used for?
Artificial satellites are used for communication, weather monitoring, and scientific research.
What was the first satellite in space?
The first satellite in space was Sputnik 1.
What is the International Space Station (ISS)?
The ISS is a space station that serves as a home and workplace for astronauts.
What was the first spacecraft to land on the Moon?
The first spacecraft to land on the Moon was Luna 2.
Who was the first person to walk on the Moon?
The first person to walk on the Moon was Neil Armstrong.
What did Apollo 11 do?
Apollo 11 was the first mission to land humans on the Moon.
How many people have walked on the Moon?
Twelve people have walked on the Moon.
What is the Moon made of?
The Moon is made of rock and metal.
