the push or pull of an object
Newton's first law of motion
an object will remain at rest unless acted upon by unbalanced force
an observation that has been repeatedly confirmed
a tenative statement about the natural world
a well proven explanation of some aspect of the world
what does a theory incorporate?
laws, inferences and tested hypotheses
What are hypotheses used for?
to build more complex inferences and explanations
What happens to truth in science?
it may be modified or discarded, is never final
the pitch of note, number of vibrations per second
the specific note or pitch at which an object vibrates at
when one object vibrates and causes another object to vibrate at the same frequency
What is the Tacoma narrows bridge an example of? (3)
resonance frequency, sympathetic vibration, wave frequency
Which is greater: force of buoyancy or force of gravity?
force of buoyancy
What is buoyancy?
the ability to float in water, air or another fluid
What is gravity?
the force that attracts an object to the center of the earth
How does bouyancy work?
if the combined density of two different objects is less, the one that is less will float up
the degree of compactness of a substance
What is the twin paradox?
if one twin moved the speed of light and the other stayed on earth, the twin that moved the speed of light wouldn't have aged while he went fast
What happens when you go the speed of light?
What is science?
finding out what is real and accumlating that body of knowledge
What does it take for a scientist to believe something?
direct, personal observation, direct personal experimentation, information from a credible source, reporting in peer viewed journals