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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 |