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chapter 22
science vocab
Term | Definition |
---|---|
Fusion | creation of energy by two hydrogen atoms coming creating helium |
connvection | heat transfer in a gas or liquid by the circulation of currents from from one region to another |
corona | The outer layer of the sun's atmosphere. |
sunspot | a cooler darker spot appearing periodically on the sun's photo sphere |
solar wind | A stream of electrically charged particles produced by the sun's corona |
nebula | a large cloud of dust and gas that can break apart into smaller pieces and form stars |
main sequence | the stage in which stars produce energy through the fusion of hydrogen into helium |
neutron star | may occur when a super giant collapses to a very dense core |
black hole | An object whose gravity is so strong that nothing, not even light, can escape. |
doppler effect | An observed change in the frequency of a wave when the source or observer is moving |
light year | distance light travels in a year |
parrallex | An apparent shift in the position of an object when viewed from different locations |