Energy
What is the definition of energy?
The ability to do work
True or False a sound wave is a Transverse Wave
False
Do electromagnetic waves require a medium to travel through like mechanical waves do.
No
Two charged particles are placed a specific distance from each other and the resulting force is measured. What happens to the electric force when the following situations occur?
A. The charge on object 1 is halved
B. The charge on object 2 is tripled
A. The electric force is also halved
B. The electric force is also tripled
List the three compositional layers of the Earth?
Crust, Mantle and Core
Fill in the blank:
Power is the amount of _____ done each second
Work
Do ultrasonic waves have shorter or longer wave lengths than sonic waves
Shorter
Suppose a photon is traveling through air. If the photon suddenly hits a lake, what will happen to its speed?
The photon will slow down.
Do electric field line arrows point toward or away from a positive charge?
The arrows point away from a positive charge
What are the three groups in which rocks are classified?
Sedimentary, Igneous, Metamorphic
What two conditions are required for a force to do work on an object?
Object must move Plus the force must act in the same direction the object is moving
When lightning strikes, the flash of light occurs practically at the same time as the clap of thunder. Why then do we hear thunder after we see lighting flash.
Because it take a longer time for sound to travel across the medium of air before the vibrations reach your ears
Explain the difference between transparent translucent and opaque materials give an example of each?
Transparent materials transmit light. Translucent materials scatter light that passes through. Opaque materials absorb or reflect light.
When a metal stovetop burner emits heat, the burner's resistance converts the ______ Energy of the flowing electrons to ______ energy.
Kinetic, Thermal
What is a mineral?
A solid naturally occurring, inorganic substances that has a definite chemical composition and a crystalline structure.
Fill in the blank:
A machine is any device that makes ______ easier to do. This is because a machine either changes the _____ of a force, changes the _____ of a force, or changes the _____ over which a force is applied
A longitudinal wave is suddenly stretched so that its wave lengths are increased. If the speed of the wave doesn't change, what will happen to the wave frequency.
When light waves get redirected because they pass through molecules or particles, it is called?
Scattering
Resistance has to do with a material's ability to oppose the flow of electric current. Which material will have less resistance: a wide metal wire or a thin metal wire?
A wide metal wire
Describe a path through the rock cycle that begins with magma and ends with a sedimentary rock.
The magma cools to form igneous rock. The igneous rock is weathered to form sediment. The sediment is the deposited and compacted to form sedimentary rock.
What are the three factors that determine the gravitational potential energy of an object?
Mass, Height, Acceleration
What is the Doppler effect?
What are the three different frequencies that cone cells can be sensitive to?
Some cone cells detect lower-frequency red light, some detect medium-frequency green light, and some detect higher-frequency blue light.
A scientist is studying two identical iron magnets. However, she notices that one has greater magnetic strength than the other. What can she say about the magnetic domains within the stronger magnet as compared to the weaker one?
The stronger magnet must have a higher percentage of aligned domains as compared to the weaker magnet.
Rain that hits the land can travel as a liquid into a lake, river, stream, or ocean in two different ways. What are they?
Surface runoff or Ground water