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Physics Final 2026
My Physics Final from 2026
| Question | Answer |
|---|---|
| What is a cloud of dust and gas coming together due to gravity to make a star | Nebula |
| What is the fuel of stars | hydrogen |
| What is the force opposing gravity in the core of a star | thermal pressure (or the outward pressure from nuclear fusion |
| What powers Earth | The Sun (solar energy) |
| What is the order of the planets | Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. |
| Which is more numerous, stars or planets | Planets (there are typically multiple planets orbiting each star). |
| Who was Carl Sagan | A famous American astronomer and science communicator who hosted the original Cosmos TV series. |
| Who is one woman who discovered new ideas of stars a hundred years ago: | Annie Jump Cannon (who developed the stellar classification system) or Henrietta Swan Leavitt (who discovered how to measure distances to stars) |
| .What is the Earth and us made of | Stardust(elements created inside exploding stars / supernovae). |
| How many Earths could fit in the sun: | About 1 million. |
| What process does a star do to create heat and light | Nuclear fusion. |
| Who came up with the process a star does to create heat and light | Arthur Eddington (and later Cecilia Payne-Gaposchkin). |
| What was the formula for the process a star does to create heat and light | E=mc^2(By Albert Einstein |
| When Helium is made, mass is lost. What does the mass turn into | Energy. |
| Why doesn't the star blow up | Gravity pulls the star inward, balancing the outward force of fusion. |
| Why doesn't the star shrink down to nothing | Nuclear fusion creates heat, which creates an outward pressure that stops gravity from crushing the star |
| What moves faster than light | Nothing |
| How long does it take for the Sun's light to reach Earth: | About 8 minutes and 20 seconds. |
| What force always wins in the universe: | Gravity. |
| What galaxy do we live in: | The Milky Way |
| .How many galaxies are there: | An estimated 200 billion to 2 trillion in the observable universe. |
| What unit of measurement do astronomers use to measure distance in space | Light-years |
| .What force holds galaxies together: | Gravity. |
| Does a supermassive black hole have enough gravity to hold galaxies together | Yes, the gravity of a central black hole helps anchor the galaxy, alongside the gravity of all the stars and dark matter. |
| Who discovered the Supermassive Black hole at the center of the Milky Way | Dr. Andrea Ghez (and Reinhard Genzel). |
| The sun is a | main-sequence star |
| A star begins as a ball of gas and dust pulled together by | gravity. |
| What are the gasses of a nebula made up of | hydrogen and helium |
| . What are the gas and dust of a nebula made of | matter |
| . A measure of the average kinetic energy, or energy of motion, of the particles in an object is: | temperature |
| The 4th state of matter, what stars and lightning are made of is called: | plasma. |
| Neutral charged particles found in the nucleus of an atom are called: | neutron |
| Negative charged particles found outside of the nucleus of an atom is called: | electrons |
| An atom is mostly made of: | empty space |
| Positive charged particles found in the nucleus of an atom is called: | protons |
| What material other than black holes keeps galaxies together: | Dark matter |
| Which is greater, the number of stars in the Universe or number of grains of sand on Earth: | The number of stars in the Universe |
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Eclipze457