The Stars
What large ball of hot gas produces light and heat through nuclear fusion?
What is a Star
What happens to a wave’s speed when it moves from a less dense medium to a more dense medium?
Slows down
What is wavelength?
Wavelength is the distance between two matching points on a wave, such as crest to crest or trough to trough.
What scientific theory explains how the universe began from a very hot, dense state and has been expanding ever since?
What is the Big Bang Theory?
What system uses only 0s and 1s to represent information in digital devices?
What is Binary code?
What is the name of the star at the center of our solar system?
What is the Sun
Which type of wave needs a medium to travel and cannot move through empty space?
What is a Mechanical Wave
What does amplitude tell us about a wave?
Amplitude shows how much energy a wave has and how tall the wave is.
What observation shows that most galaxies are moving away from us, meaning the universe is expanding?
What is Redshift?
What do the 0s and 1s in binary represent in digital transmission?
What are off and on signals?
What property of a star determines how hot it is and what color it appears?
What is Temperature?
What happens to the amplitude of a wave when some of its energy is absorbed by a medium?
The amplitude decreases because the wave loses energy as it travels through the medium.
How is frequency related to wavelength?
As frequency increases, wavelength decreases.
What faint radiation left over from the early universe provides evidence for the Big Bang?
What is the Cosmic Microwave Background
What term describes sending digital information from one device to another?
What is Digital signal
hat is the life cycle stage where a star begins when gas and dust come together due to gravity?
What is a Nebula
What happens to a wave when it hits a boundary between two different mediums?
waves can be reflected, refracted, transmitted and absorbed
What is the difference between transverse and longitudinal waves?
Transverse waves move particles up and down, while longitudinal waves move particles back and forth.
According to the Big Bang Theory, what were the first elements formed in the universe?
What is Hydrogen and Helium
Why is digital information less affected by noise than analog information?
Because digital signals can be regenerated as exact 0s and 1s.
What happens to a massive star at the end of its life when it explodes and spreads elements into space?
What is a Supernova
Give one example of a medium and the type of wave that can travel through it.
How does wave speed change when a wave enters a different medium?
The wave’s speed changes depending on the density of the medium.
What happens to the distance between galaxies as the universe continues to expand?
What increases?
What device stores digital data permanently, even when the power is turned off?
What is a hard drive?