everything lol Flashcards
What is the independant variable
the thing that we change
What is the dependant variable
the thing that we measure
What is the controlled variable
the thing that stays the same
Why do we need a controlled variable
so we have a fair test and so we have accurate and reliable data
What is a series circuit
one component after another, like a tv series. controlled by one switch
What is a parallel circuit
components in separate loops like tv channels. controlled by multiple switches
What is potential difference measured in?
volts
What is potential difference?
the push/oomph that helps the current flow
What will happen if you add more bulbs to a series circuit?
the brightness of each bulb will become less
What will happen if you add more bulbs to a parallel circuit?
the brightness of each bulb will stay the same
What will happen if you add more cells to a series circuit?
the brightness will become greater
What will happen if you add more cells to a parallel circuit?
the brightness will become greater
How does light travel
in straight lines
What do opaque objects do
they absorb all light, casting shadows
What are luminous objects?
they give off light
What are non-luminous objects
they don’t give off light, we only see them because they reflect light
Is sound a type of energy?
yes
How do sound vibrations travel?
in a wave pattern, they vibrate objects that vibrate other objects and this results in sound being carried along.
Why does sound travel faster through solids?
because the molecules are close together and transmits the energy/vibrations faster
Why does sound travel slower through gases?
because the molecules
objects in white light
a red object is red when white light hits it because it absorbs all the parts of the white light except for the the red parts which remain.
what is a molecule
2 or more atoms joined together
what is an element made up of
1 type of atom
