Electromagnetic Waves
These waves are used in an MRI to look at internal organs and tissues.
Gamma Rays
the change in direction of a wave as it passes from one medium to another at an angle
The form in which matter exists (solid, liquid or gas) is referred to as its _______
state
A mistake in the design of an experiment that makes one result more likely to happen
Experimental bias
The lowest temperature theoretically attainable at which the kinetic energy of atoms and molecules is minimal.
Absolute Zero
What effect does warm temperature have on the speed of sound?
Sound moves faster in warm temperatures
The maximum height of a wave from resting
amplitude
Which state of matter has no definite volume?
a gas
In a scientific experiment, the factor that is changed to test a hypothesis
independent variable
The force that is created when two surfaces rub together. It converts kinetic energy into thermal energy.
friction
Sound waves, seismic waves and ocean waves are examples of what type of waves?
Mechanical
These three factors determine the speed of sound
Compressibility, density and temperature
Explain the difference between kinetic and potential energy
Kinetic energy results from the motion of an object; Potential energy results from the position or shape of an object
Classify
Which type of waves are used in remote controls?
Infared waves
Explain why sound travels fastest in solids, such as wood or metal.
Because the molecules are closer together.
State the Law of Reflection
A light ray will reflect at the same angle as it contacts a mirror
The sum of an object's potential energy plus its kinetic energy is known as this:
mechanical energy
Explain the difference between objective and subjective reasoning.
Objective reasoning is decision making based on faces and evidence.
Subjective reasoning is decision making based on personal feelings.
What happens when light rays enter a new medium perpendicular to the medium's surface?
NO refraction. Direction and speed remain the same.
In a wave diagram, describe the meanings of trough, crest and wavelength.
Trough - the lowest point in the wave;
Crest - the highest point of the wave;
Wavelength - the distance between the crests of two waves.
Define Index of Refraction.
A number that tells how much a light ray will bend when it enters a medium.
Warmer, less dense fluid rises and cooler, more dense fluid sinks. What process is this describing?
convection
What does the mnemonic: DRY MIX stand for and what is used for helping you remember?
Dependent; Response; Y-axis
Manipulated; Independent; X-axis
It is used to help you remember how to graph results of a scientific experiment (where to plot the independent and dependent variables)