Radio waves,infrared radation,visible light,ultraviolet radation,x-Rays and gamma rays
100
Complete the sentence:
A star is born when.......
The contracting gas and dust from a nebula becomes so dense and hot that nuclear fusion starts.
100
What is a star system?
A group of 2 or more stars
100
What is a irregular Galaxy?
A galaxy without a certain shape
200
Describe how a telescope works
They are a instruments that collect and focus light and other forms of electromagnetic radation.
200
Finish the sentence:
The brightness of a star depends on both.......
It's size and Tempature
200
How long a star lives depends on its _____
Mass
200
Name the 3 types of galaxies
Spiral,elliptical and irregular
200
What is a spectrograph?
A device that breaks light into colors and produces an imager the resulting spectrum
300
What is a refracting telescope?
It uses convex lens to gather and focus light.
300
True or False:
Astronomers often use parallax to measure distances to nearby stars.
True
300
Fill in the blank:
After a star runs out of fuel,it a becomes a
(3 things)
White dwarf,a neutron star,or a black hole
300
What is the name of the Galaxy our solar system in? What type of Galaxy is it?
Milky Way and spiral Galaxy
300
What is a galaxy?
A huge group of single stars,star systems,star clusters,dust,and gas bound together by gravity
400
What is the convex lens?
A piece of transparent,curved so that the middle is thicker than the edges.
400
What is Hertzsprung-Russell diagram?
It was invented by 2 scientist who had the same idea around the world that they made graphs to find out the Tempature and absolute brightness of the stars are related.
400
Name the cycle of the low mass star starting at nebula
Nebula,low mass protostar,low mass star,red giant,planetary nebula,white dwarf,black dwarf
400
Astronomers used what to describe sizes and distances in the universe
Scientific notation
400
What is the difference between a spiral Galaxy and an elliptic tail Galaxy?
Spiral Is shaped like a pinwheel and elliptical is round
500
What is a optical telescope?
A telescope that uses lenses or mirrors to collect and focus visible light
500
What did the astronomers use the H-R diagram for?
To classify stars and understand how stars change over time
500
Name all the stages of the high-mass star starting from a nebula.
Nebula,high mass protostar,high mass star,supergiant,supernova,neutron star or black hole
500
What are the 2 major types of star clusters?
Open and globular clusters
500
What is apparent and absolute brightness?
Apparent brightness:brightness as seen from earth
Absolute brightness: the brightness the star would have if it were at a standard distance from earth