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sci test
sci flash cards
| Question | Answer |
|---|---|
| The smallest unit of a substance that still acts like the main substance. can be a single atom or a group of atoms. | Molecule |
| A natural object that travels around a bigger natural object | Moon |
| The curved path that a planet, satellite, or spacecraft moves as it circles around another object. | Orbit |
| A large body in outer space that circles around the sun or another star. | Planet |
| the bending of light rays as they pass obliquely from one transparent medium to another (e.g., air to water) | Refract |
| An object that orbits another object. | Satellite |
| the physical process where particles, molecules, or irregularities in a medium (like air or water) cause light rays to deviate from their straight path and disperse in various directions. | Scatter |
| A set that includes a star and all of the matter that orbits it, including planets, moons, asteroids, comets, and other objects. | Solar system |
| The constant stream of particles and energy emitted by the sun. | Solar wind |
| A ball of shining gas, made mostly of hydrogen and helium, held together by its own gravity | Star |
| The star in the center of our solar system. | sun |
| An empty space that doesn't have any matter. | Vacuum |
| The gases held by gravity around Earth and around other planets. can also be used to talk about gases around stars. | Atmosphere |
| The basic building block of matter. It is made of protons, neutrons, and electrons. | Atom |
| an imaginary straight line passing through the center of the planet from the geographic North Pole to the South Pole | Axis |
| an astronomical object with gravity so intensely concentrated that nothing—not even light—can escape its pull. | Black hole |
| The name for all the different kinds of light and energy in the universe. This includes radio waves, microwaves, infrared radiation, visible light, ultraviolet light, X-rays, and gamma rays. | Electromagnetic spectrum |
| also known as solar altitude, is the angle between the sun's position in the sky and the horizontal plane of the horizon. | solar elevation |
| The circle around a planet or moon that is the same distance from its north pole and its south pole. | Equator |
| It’s a system that uses satellites, ground stations, and receivers to tell you exactly where you are on Earth | GPS |
| A force that pulls matter together. | Gravity |
| The space around a magnet where the magnetic force is active. | Magnetic field |
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