Unit 2 Thermal Energy

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For science

16 Terms

1

system

a set of parts that work together toward a goal or outcome

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2

mean

the average of a set of numbers

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3

open system

matter can get in and out of it through openings in the system

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4

closed system

no matter can get in or out of it

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5

matter

anything that has mass and takes up space

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6

molecule

the smallest particle of a substance

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7

evaporation

the process where water slowly changes from a liquid to a gas and single molecules of water leave the surface and go into the air

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8

absorption

when light is taken in and converted to another form of energy

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9

kinetic energy

the energy of moving things

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10

temperature

a measure of the average kinetic energy of the particles in a sample of matter

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11

thermal energy

the energy contained within a system that is responsible for its temperature

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12

state of matter

whether something is a solid, liquid, or gas

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13

heat

the transfer of thermal energy from warmer matter to cooler to matter

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14

conduction

the transfer of thermal energy through collisions between particles

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15

design criteria

the goals that a project must achieve in order to be successful

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16

design constraints

the limitations on a design (such as time and budget)

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