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chapter 9 vocab
| Question | Answer |
|---|---|
| motion | distance from other object changes |
| reference points | is a place or object used for comparison to determine if something is in motion |
| distance | is the length of a path between two points |
| displacement | is the length and direction that an object has moved from its starting point |
| vector | is a quantity that consists of both magnitudes and a direction |
| speed | is an objects distance travels per unit of time |
| average speed | to calculate |
| instantaneous speed | is the rate at which an object is moving at a given instant in time |
| velocity | is speed in a given direction |
| slope | the slope of a direction verus time graph time graph represents speed that is |
| geocentric | in a geocentric system earth is at the center of the revolving planets and stars |
| heliocentric | is a model of the solar system in which earth and other planets revolver around the sun |
| ellipse | is an oval shape maybe elongated or nearly circular |
| moon | is a natural satellite that revolves around a planet |
| astronomical unit | is a equal meter |
| nuclear fusion | is the process in which hydrogon atoms join together in the suns core to form helium |
| core | is the center region of the sun where nuclear ffusion takes place |
| radiation | is a region of very tightly packed gas where energy is transformed mainly in the electromagnetic radiation |
| convection zone | is the outermost layer of the suns interior |
| photosphere | is the inner layer of the suns atmosphere |
| chromosphere | is the middle layer of the suns atmosphere |
| corona | is the outer layer of the suns atmosphere which means crown in latin |
| solar system | is a steam of electrically charged particles that emanate from the suns corona |
| sunspots | is the area of gas on the suns surface |
| prominences | is a huge reddish loop of gas that protects from the suns surface |
| solar flares | is an eruption of gas from the suns surface |
| terrestrial planets | the name often given to four planets |
| acceleration | is the rate at which velocity changes with time |
| work | is done when an object is caused to move a certain distance |
| energy | the ability to do work or cause of change |
| kinetic energy | energy that is an object has due to its motion |
| potential energy | stores energy that results from the position or shapes |
| gravitational potential energy | potential energy related to an objects height |
| elastic potential energy | the potentical energy of an objects that can be stretched of compressed |
| mechanical energy | an object combined kinetic energy and potential energy |
| laws of conservation of energy | states when one for of energy is transformed to another no energy is destroyed |
Created by:
mpendleton
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