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Science TTK Review
MIDTERM
Term | Definition |
---|---|
thrust | a forward movement |
volume | the measure of space occupied by a solid or a fluid |
average speed | the total distance traveled divided by the total time take to travel that distance |
momentum | a measure of how hard it is to stop a moving object |
density | the mass per unit volume of a substance |
mass | the amount of matter in an object |
biomass | burned materials that come from plants and animals |
joule | the SI unit of work and energy |
reference point | the starting point you use to describe the motion or the position of an object |
acceleration | am measure of the change in velocity during a period of time |
newton | the SI unit for force |
velocity | the speed and the direction of a moving object |
kinetic energy | energy due to motion |
gravity | an attractive force that exists between all objects that have mass |
buoyant force | an upward force applied by a fluid on an object in the fluid |
inertia | the tendency of an object to resist a change in its motion |
energy | the ability to cause change |
friction | a contact force that resists the sliding motion of two surfaces that are touching |
machine | any device that makes doing something easier |
renewable energy resource | an energy resource that is replaced as fast as, or faster than, it is used |
non renewable energy resource | an energy resource that is available in limited amounts or that is used faster than it is replaced in nature |
transformation of energy | when energy of one object transfers to another |
gravitational potential energy | energy stored between an object and the earth |
pascal | the SI unit for pressure |
altitude | how high you are |
sealevel | the land where sea would be |