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Sun Notes
Learn about the Sun
81
Science
11th Grade
12/02/2013

Additional Science Flashcards

 


 

Cards

Term
What does the sun's gravitational force maintain in our solar system?
Definition
Balance
Term
Where does the energy that supports life on Earth come from?
Definition
The Sun
Term
What type of energy is produced from the sun?
Definition
Nuclear
Term
What two gasses make up the sun?
Definition
H + He
Term
How is the energy produced from the sun?
Definition
Nuclear Fusion
Term
What is it called when there are energetic explosions on the surface of the sun?
Definition
Solar Flares
Term
What is photosynthesis?
Definition
The ability of plants to create food and oxygen from sunlight
Term
H + He ionize to form what?
Definition
Plasma
Term
What percent of the sun is H?
Definition
24
Term
What percent of the sun is He?
Definition
75
Term
What is the most abundant form of matter in the universe?
Definition
Plasma
Term

Describe the process of Nuclear Fusion?

 

Definition
H atoms collide and fuse with He atoms and release heat and light
Term
Where does Nuclear fusion take place?
Definition
The Core
Term
He+ He=
Definition
H + H + H
Term
Describe the Sun's core?
Definition

15,000,000 degress Celcius

Innermost Layer

Where Nuclear Fusion Takes Place

Term
Describe the Radioactive Zone?
Definition

Where energy radiates

2,000,000 - 7,000,000 degrees Celcius

Term
Describe the convection zone?
Definition

Where convection currents occur?

2,000,000 degrees Celcius

 

Term
Describe the photosphere?
Definition

Surface of the sun

Outermost atmosphere layer

6,000 degrees Celcius

Term
Describe Chromosphere?
Definition

Color sphere/ Atmosphere Layer

4,000 to 50,000 degrees Celcius

Middle Sphere

Term
Describe Corona?
Definition

Least dense atmospheric layer

1,000,000 degrees Celcius

Term
Density decreases outward as you move through the sun's atmosphere causing what?
Definition
Temperature increase
Term
What created visible reddish glow during a solar eclipse?
Definition
Corona + Chromosphere
Term
What is a Solar Wind?
Definition
Electrically charged particles that stream from the corona
Term
How cool are dark areas in the Photosphere?
Definition
3,000 degrees Celcius
Term
Suns rotation + Magnetic Fields =
Definition
Movement of gas in the Convection Zone
Term
Is energy transfer between the convection zone to photosphere is faster or slower?
Definition
Slower
Term
How long is the Sun Spot Cycle?
Definition
Eleven Years
Term
What is a prominence?
Definition
Clouds of gas create a loop along magnetic fields on sun spots lasting several hours or even weeks
Term
What is the temperature of a solar flare?
Definition
20,000,000 degrees Celcius
Term
How fast do Solar Flares travel?
Definition
Thousands of Kilometers within minutes
Term
What is the most violent of Solar Disturbances?
Definition
Solar Flares
Term
What are the Coronal Mass Ejections?
Definition
Parts of the Corona thrown off into space causing geomagnetic storms
Term
What is an aurora?
Definition
Solar Wind + Earth's Magnetosphere = Excited Nitrogen and Oxygen in Earth's upper atmosphere = Colorful Lights
Term
Ulysses was the name of the probe who went on a five year mission to what?
Definition
Analyze the Sun's poles
Term
Aurora Australia takes place where?
Definition
In the North
Term
Aurora Borealis takes place where?
Definition
In the South
Term
H + H =
Definition
Deuterium + Positron Neutrino
Term
Detrium + H =
Definition
H+ Energy
Term
What is a star?
Definition
A large celestial body that emits heat and light
Term
What are the most common elements in the stars?
Definition
H + He
Term
How do we learn about other stars?
Definition
Studying our sun
Term
How are stars formed?
Definition
Gravity gathers particles in space and causes them to collide together and condense and begin the process of Nuclear Fusion
Term
What tool is used to study stars?
Definition
Spectroscope / Spectrogram
Term
Where do stars originate?
Definition
Nebulas
Term
How is the composition of a star indicated?
Definition
Dark lines
Term
How is the temperature of a star indicated?
Definition
Color
Term
What is the coolest star type?
Definition

Red Stars

3000 degrees celcius

Term
What is the hottest star type?
Definition

Blue

30,000 degrees celcius

Term
What star type has the most average temperature?
Definition

Medium

5,500 degrees celcius

Term
What is the smallest star type?
Definition

Dwarf 

Earth Sized

Term
Our sun is what star type in terms of size?
Definition

Medium

1,390,000 km

Term
What is the largest star type?
Definition

Super Massive

1,390,000 km x 1,000

Term
What is apparent motion?
Definition
Movement as an illusion based on Earth's movement
Term
What is actual motion?
Definition

Axis rotation

Revolution around another star

Term
What is the doppler effect?
Definition
The change in wavelength of stars as they move away from Earth
Term
Shorter wavelength of stars as they move towards Earth is called what?
Definition
Blue Shift
Term
Longer wavelength of stars as they move away from Earth is called what?
Definition
Red Shift
Term
What is Apparent Magnitude?
Definition
Brightness relative to Earth
Term
Absolute Magnitude is what?
Definition
Brightness 32.6 light years away from Earth
Term
What is the Hertzsprung-Russel Diagram?
Definition
A chart that compares stars based on color, temperature, absolute magnitude, and Luminosity.
Term
What are light years?
Definition

9.46 trillion km in one year

The speed light travels in one year

Term
Stars that are close, can be determined by measuring what?
Definition
Parallax
Term
What is a parallax?
Definition
An apparent shift in position of an object when viewed from different locations
Term
How is the mass of a star determined?
Definition
By the mass of the nebula that formed it
Term
What determines a star's life cycle?
Definition
The star's mass
Term
What is the life cycle of low mass stars?
Definition

Nebula

Protostar

Main Sequence Star

White Dwarf

Term
What is the life cycle of a medium mass star?
Definition

Nebula

Protostar

Main Sequence Star

Red Giant

Planetary Nebula

White Dwarf

Term
What is the life cycle of a massive star?
Definition

Nebula

Protostar

Main Sequence Star

Red Super Giant

Supernova

Neutron Star or Blackhole

Term
What are galaxies?
Definition
Large-scale group of stars, gas and dust bound together by gravity
Term
What are the three types of galaxies?
Definition

Spiral

Elliptical

Irregular

Term
How are spiral galaxies made up of?
Definition

Nucleus or center of bright stars with flattened arms of stars that spiral around the nucleus containing young stars, gas, and dust.

 

Stars rotate around the center as the galaxy rotates.

Term
What is the Milkyway?
Definition
Home of the Solar System, a spiral galaxy
Term
What are Elliptical galaxies like?
Definition
Flattened disks have few young stars, and very little gas and dust
Term
What are Irregular galaxies like?
Definition
No shape, low mass, rich in gas and dust, least common galaxy.
Term
List two Nebulas?
Definition

Crab Nebula

Cat's Eye Nebula

Term
What are Solar Nebulas?
Definition
Nebulas where Solar Systems form
Term
What happens when nebulas collapse?
Definition
They become star clusters
Term
Describe open clusters?
Definition
Loosely shaped, less stars, hundreds of stars
Term
Describe Globular Clusters?
Definition
Spherical and contain thousands of stars up to 100,000
Term
What are constellations?
Definition
A group of stars that are organized in a recognizable pattern in 88 region that describe locations
Term
What are multiple-star systems?
Definition
Stars that revolve around eachother; usually binary stars, but can be more than two.
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