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Chapter22
vocab
Term | Definition |
---|---|
fusion | Creation of energy by joining the nuclei of two hydrogen atoms to form helium. |
convection | Heat transfer in a gas or liquid by the circulation of currents 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. |
light-year | The distance light travels in one year. |
parallax | An apparent shift in the position of an object when viewed from different locations. |
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 supergiant 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. |