Physical and Chemical Changes/Electromagnetic Spectrum Flashcards
What is evidence of a chemical change?
-Colour Change
-Formation of a Gas
-Formation of a Precipitate (Solid)
-Formation of an Odour
-Production of Light
-Change in Energy:
-Endothermic: Takes heat in and will feel cold.
-Exothermic: Gives off heat and will feel warm or hot.
What is evidence of a physical change?
-Change of state (solid, liquid, and gas)
-Change in temperature
-Change in shape
-Change in texture
What is the formula for Speed?
Speed=Distance/Time
What is the formula for Distance?
Distance=Speed x Time
What is the formula for Time?
Time=Distance/Speed
What is the formula for Speed of Light?
C=Wavelength x Frequency
What is the formula for Frequency?
Frequency=Speed/Wavelength
What is the formula for Wavelength?
Wavelength=Speed/Frequency
What is an Electromagnetic Spectrum?
A diagram that illustrates the range, or spectrum, of electromagnetic waves, in order of wavelength or frequency.
State the types of electromagnetic waves in order of wavelength from longest to shortest.
-Radio Waves
-Microwaves
-Infrared waves
-Visible Light Waves
-Ultraviolet Waves
-X-Rays
-Gamma Rays
What is the relationship between colours of light and electromagnetic waves?
The colours of light are just different wavelengths of light.
What is the only form of energy that can travel like a wave through empty space and through some materials?
Light
What does light behave like?
A special kind of wave, called an electromagnetic wave.
True or False: Electromagnetic waves are very similar to water waves.
True
What do both electromagnetic and water waves involve?
The movement of energy from one point to another.
What is defined as the distance from one crest (or trough) to the next?
Wavelength
Wavelength Definition
The distance from one crest (or trough) of a wave to the next crest (or trough).
What are electromagnetic waves that make them not able to be seen and what can they travel through?
They are invisible and can travel through a vacuum.
True or False: Electromagnetic waves travel through a vacuum, such as space, at the speed of light (3.00 x 10^8 m/s).
True
Why are electromagnetic waves more complicated than water waves?
Because they involve electric and magnetic fields.
