WorksheetsUnit 1: Changes in Brightness
Total questions: 15
Worksheet time: 11mins
Michael is learning about the Sun in his science class. Identify the process that produces energy in the core of the Sun by combining lighter elements into heavier elements.
Nuclear fission
Nuclear fusion
Radioactive decay
Chemical reaction
Aria is setting up a new radio station and needs to know what type of electromagnetic wave is used to broadcast radio and television. Can you help her?
Radio waves
Microwaves
Infrared waves
Ultraviolet waves
Lily is sitting by a campfire and feels the warmth on her skin. Which type of electromagnetic wave is responsible for transmitting this heat?
Infrared
Ultraviolet
Microwave
Radio wave
Emma is learning about different types of electromagnetic waves in her science class. She discovers that one type of wave is absorbed by the skin and is also used in fluorescent tubes. Which wave is it?
Ultraviolet
Infrared
Microwave
Radio wave
Nora and Arjun are discussing the universe in their astronomy class. They mention two pieces of evidence that support the theory that the universe is expanding. What are these pieces of evidence?
The red shift of light from distant stars and the existence of nuclear fusion.
The red shift of light from distant stars and the existence of cosmic background radiation.
The blue shift of light from distant stars and the existence of nuclear fusion.
The blue shift of light from distant stars and the existence of cosmic background.
Anika and her friends were discussing the origins of the universe during a science club meeting. They were curious about the theory that explains...
the origin of the universe.
why stars have different luminosities.
the formation of our solar system.
how Earth's atmosphere evolved.
Charlotte and her friends are at a science fair where they are using emission spectra to identify elements in a mixture by:
comparing the spectra to known elements
measuring the intensity of light
observing the color of the flame
calculating the wavelength of light
The energy from the sun is created by a process called:
nuclear fission
nuclear fusion
nuclear reaction
nuclear core
When hydrogen is "fused" together on the Sun, what new element is created?
Helium
Carbon Dioxide
Oxygen
Light
When a young, developing star becomes hot enough and dense enough, the process of _______ begins.
H --> He fusion
He --> C fusion
He --> C --> O fusion
fission
How do scientists know that the universe is expanding?
The Doppler effect shows stars with blue shifted light.
The Doppler effect shows stars with green shifted light.
The Doppler effect shows stars with red shifted light.
The Doppler effect shows stars with yellow shifted light.
First scientist to present observational evidence that supported that the universe is expanding.
Edwin Hubble
Galileo
Georges Lemaitre
Copernicus
The main piece of evidence that demonstrates that the universe is expanding is:
blue shifting of distant galaxies
red shifting of distant galaxies
darkening of distant galaxies
dissolving of distant galaxies
Which color has the shortest wavelength and highest frequency?
