Shine Bright
What two ways do scientists differentiate the brightness of a star?
Apparent Magnitude and Absolute Brightness
What is the coolest color of stars?
Red
What color is the Sun?
Yellow
What color would an medium-temperature, but dim star would be?
Yellow; remember color relates to temperature
process by which heat is transfer through a vacuum
radiation
Looking up at the night sky I can see many stars. If star A is brighter than star B when I look up, what am I comparing?
Apparent Magnitude
If I plot a red supergiant star on an H-R diagram would the temperature be toward the low or high end?
Low; red is the coolest star
The Corona
Mario observes stars through his telescope. He states that the star Regulus is brighter than the star Rigel. In reality, Rigel has a greater absolute brightness than Regulus. What can explain Mario’s observation?
A. Regulus is a hotter star than Rigel.
B. Rigel is a hotter star than Regulus.
C. Rigel is much closer to Earth than Regulus.
D. Regulus is much closer to Earth than Rigel.
D. Regulus is much closer to Earth than Rigel.
what heat transfer is taking place when a pot is being heated on a stove
conduction
What star would have the most negative number associated with its Apparent Magnitude?
The Sun (Negative means it is brighter)
What measure of brightness does the H-R Diagram display?
Absolute Brightness
What layer of the Sun produces all the energy for the star?
The Core
What does the term "Property" mean when talking about the properties of stars?
A characteristic/ attribute/ quality
what occurs in the convection zone of the sun
warm plasma rises and cooler plasma sinks
Star A is 1,000 Light Years from Earth while Star B is 5,000 Light Years from Earth. They both appear the same brightness from Earth.
Which star has a higher Absolute Brightness?
Star B
List the color of stars from Hottest to Coldest.
Blue, White, Yellow, Orange, Red
what the reason for the varying rotation of the sun
the sun is a ball of gas/ plasma causing differential rotation
Which of the following best explains a solar flare?
A. a cooler location on the surface of the Sun
B. a ring of light that surrounds the surface of the Sun
C. a bright burst of radiation from the surface of the Sun
D. a loop of plasma connecting two spots on the surface of the Sun
C. a bright burst of radiation from the surface of the Sun
what is the relationship between size of a star and brightness
the larger the star, the greater its luminosity
how does the luminosity of a ten-watt light bulb placed two inches from your face compare to the luminosity of the same bulb when you view it from across the room?
.The luminosity id greater when viewed 2 inches away
What do we call the continuous band of stars that are plotted along the middle of the H-R Diagram?
Main Sequence Stars
Where do Sunspots, Solar Flares, and Prominences happen on the Sun?
The Photosphere
What happens in the core of the sun?
what is nuclear fusion
Gloria is at the observatory and is examining a newly discovered star through a powerful telescope. she wants to know the absolute brightness of the star. what information does she need to calculate the absolute magnitude of the star
apparent magnitude and distance