Universe & Electromagnetic Spectrum Flashcards
- What is the only part of the spectrum visible to the human eye?
Visible light
- Complete the data chart for each type of wave:
UV (ultra-violet)
x-rays
Gamma
Type of wave: UV (ultra-violet)
How it damages living cells: Can cause skin cancer
Useful benefits: Produce Vitamin D, tanning
Type of wave: x-rays
How it damages living cells: Too much exposure can cause cancer
Useful benefits: Medical imaging, security
Type of wave: Gamma
How it damages living cells: Can cause mutations to DNA
Useful benefits: Kills cancer cells
- What type of wave is used for thermal imaging & why? Infrared is used because it is felt as heat
Infrared is used because it is felt as heat
- What is the name of our galaxy & describe its shape? The Milky Way. It is a spiral or barred spiral galaxy.
The Milky Way. It is a spiral or barred spiral galaxy.
- Complete the data chart:
Type of measurement: Astronomical unit (AU)
Distance: ??
What it is most commonly used to measure in space: Distances in our solar system
Type of measurement: ??
Distance: 9.5 trillion km
What it is most commonly used to measure in space: ??
Type of measurement: Astronomical unit (AU)
Distance: 150 million km
What it is most commonly used to measure in space: Distances in our solar system
Type of measurement: Light-year
Distance: 9.5 trillion km
What it is most commonly used to measure in space: Distances to stars & galaxies
- What is the difference between a galaxy & a nebula?
A galaxy is a collection of stars, gas, and dust held together by gravity. A nebula is smaller than a galaxy and is a large cloud of gas and dust.
- Put the following terms in order from smallest to largest: solar system, galaxy, universe, planet, nebula, Virgo Super-cluster, Local Group
planet, nebula, solar system, galaxy, Local Group, Virgo Super-cluster, universe
- What is the difference between the red-shift & blue-shift?
A red shift shows that a star or galaxy is moving away from Earth. A blue shift would show an object is moving toward Earth.
- What inference about our universe do scientists make using evidence from the red-shift?
They can infer that the universe is expanding.
- What type of rays does the Hubble telescope collect that allows us to learn about invisible aspects of our universe?
Ultraviolet, near-infrared
- List the spectrum from longest wavelength to shortest.
Radio, microwaves, infrared, visible, ultraviolet, x-ray, gamma ray
- Which types of radiation can be used to disinfect & sanitize bacteria that could potentially harm humans?
ultraviolet
- List the visible light spectrum in order from longest wavelength to shortest?
Red, orange, yellow, green, blue, indigo, violet
- What is the relationship between wavelength and frequency?
If wavelength is shorter, frequency is higher. If wavelength is longer, frequency is lower.
- How does energy relate to frequency?
High frequency= high energy
