Sun as a Star Review Sheet Flashcards
The main source of energy on Earth is:
The Sun
The Sun’s energy comes from:
The fusion of hydrogen into helium
The Sun has existed for about five billion years and will continue to shine for about another:
Five billion years
Radiation from the Sun:
Warms Earth, causing circulation in the oceans and atmosphere
Charges particles coming from the Sun are part of what is called the:
Solar wind
Cool, dark areas on the surface of the Sun are known as:
Sunspots
Which of the following statements about the solar system is not true?
The planets formed
Charged particles from the Sun can strike the upper atmosphere, causing it to glow in a colorful display called the:
Aurorae
The Sun is a huge ball of mostly what kind of gas?
Hydrogen
The number of sunspots on the Sun changes in relation to the Sun’s magnetic cycle.
True
The Sun does not rotate on its axis:
False
The surface temperature of the Sun is _____________ degrees Celcius.
5700
Region of the Sun where hydrogen fuses to helium
Core
Sweeps past the planets
Solar Wind
Sometimes show sunspots
Surface
The is the hot, outermost layer of the Sun
Corona
The Sun is powered by:
Nuclear fusion
What is given off as a result of the reactions deep inside the Sun?
Energy
Hydrogen nuclei fuse into helium nuclei in what part of the Sun?
The core
A ten year-old person produces 10,000 times more energy per kilogram every second that does the Sun.
True
Sunspots, aurorae, and solar wind are all tied to the Sun’s ____________ cycle
Magnetic
Every high-energy flare that erupts on the Sun will have a negative effect on Earth
11 years
The Sun and the solar system were formed from a swirling cloud of ________ and _______.
Dust; Gas
The Sun is so hot that hydrogen atoms are ripped apart, creating electrically charged particles known as:
Plasma
