4.1-4.2 Flashcards
What is convection?
The transfer of energy from place to place by the motion of heated gas or liquid; in Earth’s mantle, convection is thought to transfer energy by the motion of solid rock, which when under great heat and pressure can move like a liquid
What is fusion?
When hydrogen fuses into helium in the Sun’s core
What is the corona?
The outer layer of the Sun
What is sunspot?
A darker spot on the photosphere of the Sun. A sunspot appears dark because it is cooler than the surrounding area.
What is solar wind?
A stream of electrically charged particles that flows out in all directions from the Sun’s corona
What is a lightyear?
The distance light travels in one year, about 9.5 trillion kilometers
What is parallax?
The apparent shift in the position of an object when viewed from different locations
What is nebula?
A cloud of gas and dust in space
What is main sequence?
The stage in which stars produce energy through the fusion of hydrogen into helium
What is a neutron star?
A dense core that may be left behind after a higher-mass star explodes into a supernova
What is a black hole?
The final stage of an extremely massive star, which is invisible because it’s gravity prevents any form of radiation from escaping
How does the Sun produce energy?
When hydrogen fusion occurs in the Sun’s core (hydrogen into helium)
Lost the layers of the Sun from innermost to outermost.
Core, radiative zone, convection zone, photoshpere, chromosphere, corona
On which layer of the Sun do sunspots appear? What do they look like?
- Photosphere
- Appear dark, are actually bright because they are cooler than the area surrounding
What do light years measure?
The distance light travels in a year
