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Science Test
N/A
27
Science
8th Grade
11/21/2011

Additional Science Flashcards

 


 

Cards

Term
Sunspot
Definition
A Dark area on the sun that is cooler than its surrounding areas. It is an area of intense magnetic fields
Term
Sunspot cycle
Definition
A cycle where the number of sunspots are low but increase. Lasts 11 years.
Term
Solar activity cycle
Definition
The solar activity cycle is caused by changing solar magnetic field. The more solar activity, the more sunspots.
Term
How can you tell the number of sunspots there are on a graph?
Definition
By the number of peaks
Term
How does activity on the sun cause an aurora?
Definition
The activity on the causes an aurora by having solar flares or by having the sunspot cycle end. Plus, interaction between the solar wind and Earth's magnetosphere.
Term
Solar Flare
Definition
An explosive release of energy that comes from the sun and that is associated with the magnetic disturbances on the sun's surface. Solar flares make auroras occur more often on Earth.
Term
True or False:
Nuclear fusion reactions that combine with smaller nuclei to form more massive ones are the source of the sun's energy?
Definition
True
1H->2H->3He->4He
Term
Prominence
Definition
A loop of relatively cool incandescent gas that extends above the photosphere and above the sun's edge as seen from Earth.
Term
Which stars have the highest absolute magnitude?
Definition
The starts that have the highest absolute magnitude are the Red Giants.
Term
BY looking at the x-axis and y-axis, can you tell in which direction he starts move when their temperature and absolute magnitude are the dimmest and coolest?
Definition
The stars move down and to the right.
Term
The most common color of star in the main sequence
Definition
Yellow
Term
Type of star a main sequence star becomes when it loses its energy
Definition
Super Giant
Term
Two forces that have to equal each other for a star to become stable
Definition
Outward force due to fusion and radiation and the force of gravity.
Term
Galaxy we live in
Definition
Milky Way
Term
Big Bang Theory
Definition
THe universe was hot and small and then eventually cooled and expanded.
Term
Big Bang Theory
Definition
The universe was hot and small and then eventually cooled and expanded.
Term
How does the presence of cosmic background radiation support the big bang theory?
Definition
It indicates that the universe was once compact and hot and that it cooled and expanded.
Term
Cosmic background radiation
Definition
It is electromagnetic radiation that fills the Universe. The radiation can only be detected with a radio telescope which makes it show as a faint glow
Term
True or False:
The doppler redshift is a measurement of celestial objects moving outward from Earth.
Definition
True
Because the distant galaxies have red shifted spectra which indicates that these galaxies are moving away from Earth.
Term
Process that formed the solar system
Definition
Matter spread through the universe gathered into clouds of gas and dust -> explosion of a nearby supernova-> gravity -> hotter and denser
Term
Phases of the moon.
Definition
New moon
Waxing Crescent
First QuarterWaxing Gibbous
Full Moon
Waning Gibbous
Third Quarter
Waning Crescent
Term
Solar Eclipse
Definition
Sun, Moon, Earth
Term
Lunar Eclipse
Definition
Sun, Earth, Moon
Term
Number of times the Moon rotates on its orbit around the Earth.
Definition
Once a month
27.3 days that the moon orbits Earth
29.5 days on its axis
Term
Amount of times energy is released in the penny lab.
Definition
5
Term
Nuclear________ is the reaction modeled above.
Definition
fusion
Term
Ho many hydrogen atoms does it take to form a helium atom?
Definition
4
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