Science 7 Flashcards
Does the moon provide its own source of energy?
No
During the day what are the largest celestial objects that we can recognize?
Sun and Moon
What is a light year?
The distance that light will travel within one year of time
Do stars have internal sources of energy?
Yes
In comparison to the sun, the earth receives what measure of light from stars?
Only a tiny fraction because the stars are only light minutes away from the sun
In relation to stars what is the suns measure of energy output?
It is only average in terms of energy output compared to stars. However it’s closer to earth so the light received from it is far more dominant then what Earth receives from stars
What form of energy does the earth receive from the sun?
Electromagnetic waves
What type of electromagnetic waves does the sun emit to the earth primarily?
Visible, ultraviolet, and x-Ray bands
What are the electromagnetic waves of radiation characterized by?
Electric and magnetic fields
List the band of wave links from short to long.
Gamma ray, x-ray, ultraviolet, visible, infrared, microwave, and radio waves
The visible part of the spectrum can be further subdivided by color bands from long to short. List them.
Red, orange, yellow, green, blue, indigo, and Violet
By what process does the energy from the sun support almost all life on earth?
Photosynthesis
What is a major source of biomass on earth?
The organic compounds, usually sugars and oxygen, that are a result of photosynthesis.
True or false. The sun is also primarily responsible for driving weather and climate conditions on earth.
True
Order the seven visible forms of electromagnetic radiation from short to long wavelength.
Violet, indigo, blue, green, yellow, orange, red
What units are energy and its ability to do work measured in?
Jules or calories
Which is a larger unit of measure joules or calories?
Joules
What type of energy is kinetic energy supposed to be?
The energy of motion
An increase in an objects velocity will also result in an increase in the objects __________.
Kinetic energy
What is the formula for Kinetic energy?
KE equal one half MV squared
