Chemical reactions
What is a chemical reaction?
where one or more substances react into a new substance.
What type of wave does sound travel in?
Longitudinal waves
What is the law of reflection?
The angle of incidence is always equal to the angle of reflection.
What is potential difference measured in?
Volts
What are the properties of group 0 in the periodic table?
They are unreactive.
What is the difference between a chemical reaction and a physical reaction?
with chemical changes, the substance is broken down or formed into a new one. with a physical change, only the form changes, not the substance.
What are the two types of waves?
transverse and longtidunal
What medium does light travel in?
No medium.
What is current measured in?
Amps/amperes
Which group of the periodic table is known as the halogens?
Group 7
Whats the boiling point of water approximately?
100 degrees celsius
whats the back and forth movement that creates sound
vibrations
what happens to light when it enters a prism
it turns into a rainbow
What do you use to measure potential difference?
You use a voltmeter.
whats the trend in group 1
the reactivity increases as you go down the group
what does reversible chemical reactions mean and give an example.
it means the reaction can be reverted back to it's original state. An example could be turning water into an ice cube. You can melt it back into water.
The higher the frequency, the higher the ___?
pitch
What happens to light when it enters a new medium
it refracts or in simpler terms: bends
What do you use to measure current?
With an ammeter.
Whats group 8
the noble gases
what does irreversible chemical reactions mean and give an example
it means the reaction cant be reverted, like cooking or baking.
What medium can sound travel the best in?
Solids
Why cant we see objects in a dark room, but outside we can
becuase in a dark room there is no light to reflect into our eyes but outside there is
What are the two types of circuits?
Series and parallel
give an example of noble gases
krypton