General
What am I made of?
Star Formation
Miscellaneous
100
What are stars made of?
Hot gases
100
Which element is the unknown gas?
Oxygen
100
What is a nebula?
A cloud of gas and dust
100
What do the numbers at the bottom of the spectral lines measure?
The wavelength of light
200
What is the type of reaction that fuels stars?
Fusion
200
Each element on the periodic table has a unique unique fingerprint, also known as a _____
Spectral line pattern
200
What force transforms a nebula into the core of a star?
Gravity
200
Which star is cooler?
The star on the left (Pollox)
This star was once blue and bright like star on the right, but as it got older it began to produce less and less energy. This reduced the temperature and its colour shifted towards red.
300
What is nuclear fusion?
When two nuclei fuse
300
A scientist has a sample of an unknown gas. In order to identify it, she shines a continuous spectrum of white light through the gas and observes which wavelengths of light are absorbed by it.
Which of the five elements is the unknown gas?
Xenon
300
What is a young star called?
A protostar
300
What is it called when a star dies in a fabulous explosion?
A supernova
400
What force opposes the energy produced by nuclear fusion?
Gravity
400
An astronomer observes the spectral lines of a star. Which of the following elements are present in the star's atmosphere?
Hydrogen, helium, and carbon
400
What happens if a protostar doesn't have a lot of matter surrounding it?
It shrinks away and never becomes a star.
400
What is the opposite of nuclear fusion?
Nuclear fission