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40 Cards in this Set
- Front
- Back
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How many variables are there in a valid experiment? |
There should only be one variable or one thing you are testing if you want valid data. |
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What are the 6 steps in the scientific method? |
Observation,Research,hypothesis,experiment, analyze data,draw conclusions |
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Control Group |
used for comparison |
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Independent variable |
what you are testing |
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dependent variable |
data you are collecting |
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constants |
factors that stay the same |
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conclusions |
must support or not support your hypothesis based on evidence |
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problem |
question of why or how becomes the problem |
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hypothesis |
prediction to problem |
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cohesion |
particles of same substance sticking together |
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surface tension |
tension of surface |
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motion |
net forces create a change in motion |
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law of universal gravitation |
gravitational forces act on all objects irrespective of their size and position |
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acceleration |
change in speed |
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scalars |
magnitude alone |
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vector |
magnitude and direction |
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scalar quantity |
distance,speed |
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vector quantity |
displacement,velocity,acceleration |
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magnitude |
numerical value |
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If Sally moved 12 blocks in 2 hrs how fast was she moving? |
S=d/t She is moving 1 block every 10 minutes s=12/120m s=10 |
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Jonah moved up a hill 5 meters in 5 seconds, what was his velocity? |
v=d/t v=5/5 v=1m per second |
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gases |
molecules moving in all directions |
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buoyancy |
upward force exerted by a fluid |
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elastic force |
force exerted by materials that stretch easily |
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tension |
stretched tight |
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friction |
rolling,static,fluid, and sliding |
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spring force |
force exerted by a compressed or stretched object upon any object that is attached to it |
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force |
push or pull |
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contact forces |
friction,tension,applied,spring,elastic,normal |
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newtons first law |
an object at rest stays at rest while an object in motion stays in motion |
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inertia |
the tendency of an object to resist changes in its state of motion |
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mass |
measurement of mass in an object |
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A car moving 30mph comes to a complete stop in 1 second. What is the acceleration? |
a=vf-vi/t a=0-30/1 a=-30/1 a=-30 miles per hr per second |
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A truck going 60mph down the highway slows down to 45mph in 3 seconds. What is his acceleration? |
a=vf-vi/t a=45-60/3 a=-15/3 a=-5miles per hr per second |
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If you push a 3kg block with 12n of force, what would the acceleration be? |
a=fnet/m a=12n/3kg a=4km/s2 |
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How much force was used to push a box that had a mass of 10kg at 30m/s2? |
f=ma f=10x30 f=300 300n |
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what is the free fall speed |
9.8m/s2 |
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forces |
equal in size opposite in direction always in pairs |
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newtons second law |
all existing forces are not balanced acceleration of an object is dependent upon net force and mass the direction of the net force is the same direction as the acceleration |
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newtons third law |
every action has an equal or opposite reaction |
