ACTUAL Questions and CORRECT
Answers
Simple Machine - CORRECT ANSWER - a mechanical device that changes the direction
or magnitude of a force
Mechanical Advantage - CORRECT ANSWER - the ratio of the output to the input force
What are the 4 classical simple machines as defined by scientists? - CORRECT
ANSWER - -Lever
-Pulley
-Inclined Plane
-Screw
Lever - CORRECT ANSWER - a rigid object that is used with an appropriate fulcrum or
pivot point to multiply the mechanical force that can be applied to aother object
Wheelbarrow - CORRECT ANSWER - What is an example of a lever?
Pulley - CORRECT ANSWER - composed of a wheel with a groove between two flanges
around the wheel's circumference. A rope, cable or belt runs through the groove
Helps individual lift something over the length of the rope - CORRECT ANSWER -
What's an example of a pulley?
Inclined Plane - CORRECT ANSWER - a flat surface whose endpoints are at different
heights, resulting in a slope.
,Screw - CORRECT ANSWER - (inclined plane) can convert a rotational force to a linear
force and vice versa.
What do the forms of energy include? (8) - CORRECT ANSWER - -Solar
-Chemical
-Electrical
-Magnetic
-Nuclear
-Sound
-Light
-Electromagnetic
Energy - CORRECT ANSWER - the ability to perform work, to move objects
Kinetic Energy - CORRECT ANSWER - the energy possessed by a moving object
Potential Energy - CORRECT ANSWER - an object that is in an unstable position because
it could be converted into movement
Thermal Energy - CORRECT ANSWER - energy in which heat can be converted to
motion and motion can produce heat
Electricity & Magnetism - CORRECT ANSWER - 2 things that can be converted into heat
and motion
Law of Conservation of Energy - CORRECT ANSWER - states that energy can be neither
created nor destroyed
,Electricity - CORRECT ANSWER - the form of energy that can be used to produce sound,
light, heat, and power
where the number of negative electrons does not precisely equal the number of the positive
protons - CORRECT ANSWER - Where does electricity exist?
Current - CORRECT ANSWER - when the electrons flow in one direction, this flowing
electricity is referred to as
What are 5 materials that have high conductivity? - CORRECT ANSWER - -Aluminum
(Al)
-Iron (Fe)
-Nickel (Ni)
-Silver (Ag)
-Gold (Au)
Insulators - CORRECT ANSWER - poor conductors of electricity; electrons are held
tightly inside their atoms and electrons cannot move freely
-Plastic
-Rubber
-Wood
-Glass
-Air - CORRECT ANSWER - 5 examples of insulators?
Electric Circuit - CORRECT ANSWER - the path or circuit an electrical current flows
Static Electricity - CORRECT ANSWER - results when electrical charges buildup or
increase on the surface of a material
, Light - CORRECT ANSWER - what energy travels in perfectly straight lines as rays
At the interface between two transparent materials, like air and water - CORRECT
ANSWER - Where does the direction of a ray change?
Nuclear Energy - CORRECT ANSWER - has been obtained by two different means,
fission & fusion
Nuclear Fission - CORRECT ANSWER - releases energy when a heavy nucleus splits into
smaller fragments
in power plants & atomic bombs - CORRECT ANSWER - When is nuclear fission used?
Nuclear Fusion - CORRECT ANSWER - different elements unite
Stars (sun) get their energy from nuclear fusion - CORRECT ANSWER - What is an
example of nuclear fusion?
freezing point of water - CORRECT ANSWER - What does zero degrees celsius mean?
Boiling point of water - CORRECT ANSWER - What does 100 degrees celsius mean?
Temperature Interval - CORRECT ANSWER - a difference between two temperatures or
an uncertainty
32 degrees F - CORRECT ANSWER - What is the freezing point on Fahrenheit scale?
212 degrees F - CORRECT ANSWER - What is the boiling point on Fahrenheit scale?