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- 1. Multiple Choice
All stars create energy in their core through a process called _____nuclear fissionnuclear fusionthermal decompositionchemical combustion - 2. Multiple ChoiceMost stars are made up of mostly two kinds of gases - _____hydrogen and heliumhydrogen and neonoxygen and heliumoxygen and carbon dioxide
- 3. Multiple ChoiceAstronomers sometimes refer to a star's true brightness as its _____brillianceluminosityshine factorglossiness
- 4. Multiple ChoiceThis term means "how bright the star is, as if you were hovering right in front of it"true brightnessapparent brightnessaccurate brightnessdirect brightness
- 5. Multiple ChoiceWhich term refers to how bright a star appears to us, when observed from Earth?true brightnessapparent brightnesssupposed brightnesslikely brightness
- 6. Multiple ChoiceHow many Earths could fit inside the Sun?200400400 thousandmore than a million
- 7. Multiple ChoiceWhich star is about 400 times bigger than the Sun, and 100,000 times more luminous?PolarisVegaBetelgeuseSirius
- 8. Multiple ChoiceThe Sun appears so big and bright to us on Earth because ______it's the biggest starit's the hottest starit's so close to usit's the most luminous star
- 9. Multiple ChoiceWhich two factors influence a stars apparent brightness?luminosity and its distance from ussize and luminositymass and its distance from usits mass and size
- 10. Multiple ChoiceA star is a huge ball of hot gas that makes _____sound and lightheat and soundheat and lightheat and colour
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