Physics
Process of Science
Chemistry
Math Mania
Grab Bag
100
What are the units used to describe the following measurements? Force - Work - Power -
Force - Newton Work - Joule Power - Watt
100
What are the three main branches of natural science?
Life, Physical, Earth & Space
100
What are the charges of all three subatomic particles and where are they located in an atom?
proton - positive - nucleus neutron - neutral - nucleus electron - negative - orbiting in electron cloud
100
If you exert a force of 12 N to lift a box a distance of 2.4 meters how much work do you do?
28.8 J
100
What are the base metric units for length, volume, and mass?
length - m volume - L mass - g
200
What is a compound machine?
Two or more simple machines working together.
200
How is precision different than accuracy?
precision - exact measurement accuracy - close to true value
200
What are the six phase changes? Which one would boiling be classified under?
evaporation (boiling), condensation, sublimation, deposition, freezing, and melting
200
If you perform 60 Joules of work lifting an 8 N box from the floor to a shelf how high is the shelf?
7.5 meters
200
Write the following numbers in scientific notation: 6,400,000,000,000 and .0000000000000218
6.4x10^12 and 2.18x10^-14
300
What can a machine multiply?
force
300
What is the scientific method? Define and name at least three of it's steps.
An organized plan to gather, test, and share information.
300
What are the outermost electrons in an atom called?
Valence electrons
300
If you exert a force of 300 N to walk 12 m up a flight of stairs in 15 seconds, how much power do you use?
20 Watts
300
What is the law of conservation of mass?
Matter can be neither created nor destroyed.
400
Why is the efficiency of a machine always less than 100%?
friction
400
How is a homogeneous mixture different than a heterogeneous mixture?
homogeneous - uniform throughout heterogeneous - can see individual parts that differ
400
How is exothermic different than endothermic and which would best describe the melting of ice?
exo - heat out endo - heat in - melting
400
A mechanical device requires 600 J of work to do 520 J of work in lifting the crate. What is the efficiency of the device?
87%
400
If you heat a balloon what happens to the volume?
it increases
500
What are the three ways a machine can make work easier?
Change size of the force Change the direction of the force Change the distance over which the force acts
500
How are qualitative measurements different than quantitative?
qualitative - observations that are not measurable quantitative - definite measurements
500
On the periodic table horizontal rows are called _________, while vertical columns are ___________.
horizontal rows - periods vertical columns - groups
500
A motor with an efficiency rating of 12 percent must supply 300 J of useful work. What amount of work must be supplied to the motor?
2500 J
500
What are the four states of matter and their properties?
solid - definite shape and volume liquid - definite volume, indefinite shape gas and plasma - indefinite shape and volume
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