WorksheetsUnit 1 Review
Total questions: 20
Worksheet time: 12mins
How would you label the x and y-axes on this HR diagram?
x = temperature in C
y = luminosity (brightness)
x = temperature in K
y = luminosity (brightness)
y = life span
x = magnetism
The brightest stars are located at the (a)
The hottest stars are located on the (a)
How does the Sun get its energy?
nuclear fusion
nuclear fission
convection
photosphere
Sunspots occur in regions of the sun…
where strong magnetic fields poke through the surface
where there are holes in the surface that are like tornadoes boring down into the cooler gases below the surface
where weak magnetic fields poke through the surface
The nuclear fusion reactions occurring inside the Sun combine…
Helium into Hydrogen
Oxygen into Carbon
Uranium into Radium
Hydrogen into Helium
Sunspots often come in pairs where the Sun’s magnetic poke through to surface . The spots are cooler due to the magnetic field suppressing the local…
conduction heating
radiative heating
Convection heating
atomic heating
Which star stage does our Sun belong to?
Supergiant
Main Sequence
White Dwarf
Giant
When sunspots form we can observe them in the ...
Photosphere
Core
Radiative Zone
Convection zone
Sunspots are about twice Earth’s size and have lifetimes of…
hours to days
minutes to hours
days to weeks
weeks to months
What are hr diagrams?
something for math
i dont know
a graph about stars
a way to classify stars
What are the three main details stars are plotted on hr diagrams for?
color,temperature,and size
color, brightness, and temperature
brightness, color, and size
A large cloud of gas and dust in interstellar space; the predecessor to stars...
(a)
Stars produce...
Heat
light
both heat and light
What determines the color of a star?
It's composition
It's size
They are all the same color
It's temperature
As you move from the bottom to the top of the H R diagram the __________ changes.
Temperature
Luminosity or Brightness
The main force acting on a nebula is:
thermal expansion
singularities
microscopic adhesion
gravity
Stars are made mostly of which two elements?
Hydrogen and helium
Nitrogen and helium
Hydrogen and oxygen
Nitrogen and oxygen
The combining of two or more atoms in a stars core into a new heavier atom.
Fission
Nuclear Reactions
Fusion
Nucleosynthesis
The star that appears brightest to us on Earth is
Polaris
the Sun
Sirius
