(1) Atoms, molecules, and elements
Does an atom have a color?
atoms (as opposed to molecules) do not have colors - they are clear except under special conditions.
What is the difference between a traveling wave and a standing wave?
Traveling waves are periodic disturbance that moves through some medium—air, space, vacuum—transferring energy from one point to another.
Standing waves are a pattern of motion that oscillates in place, without transferring energy from one point to another.
what is the definition of opaque?
true or false matter is neither created nor destroyed?
True matter only changes.
What is potential energy?
Potential energy is a type of stored energy that an object or system of objects has.
What is friction?
Friction is the force between two objects in contact with each other that will resist an attempt to move them.
What are the necessary conditions for two interfering traveling waves to combine to make a standing wave?
The waves must be traveling in opposite directions and have equal amplitudes and frequencies in order to produce a standing wave pattern.
What is the definition of translucent?
allowing light, but not detailed shapes, to pass through; semitransparent.
"the back is made from a translucent material"
what is matter?
anything that takes up space.
What is Kinetic energy?
Kinetic energy is the energy of motion.
How many of Newtons laws are there?
3
What is the shape of an electron?
What is the difference between frequency and angular frequency?
Frequency describes how many times per second a motion happens.
how does light travel?
Light travels as a wave. But unlike sound waves or water waves, it does not need any matter or material to carry its energy along.
How is paper changed when it is burned?
it is a chemical change, the paper is turned to dust, ashes, and heat.
When potential energy decreases, what happens to the kinetic energy?
The kinetic energy increases.
What is an example of force and motion?
Climbing, jumping, running, chasing, throwing, sliding
Does an electron in an atom move at all?
What are the characteristics of simple harmonic motion?
Simple harmonic motion is a specific form of periodic, repeated motion that has a constant frequency, a constant amplitude, and can be described easily by a sine or cosine function.
What is the definition of reflection
the throwing back by a body or surface of light, heat, or sound without absorbing it.
how is paper changed when it is crumpled up?
it is a physical change the paper is still there.
What force causes potential energy?
The force of gravity.
What is Newtons 3rd law?
For every action, there is an equal and opposite reaction.
What is the difference between a transverse and a longitudinal wave?
Both are traveling waves, but oscillate in different directions as they move. A transverse wave oscillates orthogonally to its direction of movement
What is the definition of refraction?
the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.
true or false? rust is an example of a chemical change.
true, from it begin regular iron it turns to iron oxide.
What causes potential energy to be kinetic energy?
Once a force has been applied or it begins to move
How do objects of different masses interact when they collide?
If colliding objects have unequal mass, they will have unequal accelerations as a result of the contact force that results during the collision.