unit 5

Question 1

what can you use to describe temperature

Answer 1

hot and cold

Question 2

what is a constant random motion made up of molelcules and ions?

Answer 2

matter

Question 3

the particles in matter have what type of energy?

Answer 3

kinetic

Question 4

measure of the avergae kinetic enrgy of the particles that make up the object

Answer 4

temperature

Question 5

temperature is measured in what?

Answer 5

kelvins

Question 6

1 k = how many degrees C

Answer 6

1

Question 7

sum of kinetic energy and the potenital energy of all the particles that make up that object

Answer 7

thermal enerrgy

Question 8

thermal energy depnds on what 2 factors

Answer 8

temperature and mass

Question 9

if mass object ____, the thermal energy of the object _____

Answer 9

increases, increases

Question 10

energy that is transformed between objects due to tmeperature between those objects

Answer 10

heat

Question 11

heat can change depending on the ___ of the object

Answer 11

nature

Question 12

the amount of heat needed to raise the tempearure of 1 kg of that material by 1 degree C

Answer 12

specific heat

Question 13

substance that can absorb great amount of thermal enrgy with little change in temperature

Answer 13

coolant

Question 14

change in thermal energy equation

Answer 14

Q = m(Tf - Ti)C

Question 15

the transfer of thermal energy by collisions between the particles that amke up matter

Answer 15

conduction

Question 16

true or false:
conduction, convection, and radiation transfer energy

Answer 16

true

Question 17

how does the trasnfer of energy occur?

Answer 17

particles that make up matter are in constant motion

Question 18

the rate at which conduction transfers tyermal energy depends on the _____

Answer 18

material

Question 19

conduction is faster in _____ and ______

Answer 19

solids; liquids

Question 20

what is the best condcutor of thermal enrgy

Answer 20

metals

Question 21

in what can convection transfer thermal energy

Answer 21

fluids

Question 22

the trasnfer of thermal energy ina fluid by the movemnts of warmer and cooler fluids

Answer 22

convection

Question 23

what type of currents trasnfer thermal energy from warmer to coolor parts of the convection currents

Answer 23

convection currents

Question 24

what two things transfer themals energy

Answer 24

convection and conduction

Question 25

what transfers enrgy from the sun to earth

Answer 25

radiation

Question 26

the transefr of enegy by electromagnetic waves such as light and microwaves

Answer 26

radiation

Question 27

can radiation travel through space even when matter ist present

Answer 27

yes

Question 28

radiation travels better through

Answer 28

gases

Question 29

a material through which therm. energy moves slowly

Answer 29

thermal insulator

Question 30

what si the most common type of heating system

Answer 30

forced air system

Question 31

transfers thermal energy in hot water

Answer 31

conductions

Question 32

spreads energy throughout room

Answer 32

convection

Question 33

materials inside of builiding absorb radiant energy from sun and heatup

Answer 33

passive solar heating

Question 34

solar collector is used

Answer 34

active solar heating

Question 35

device that turns radiant energy from sun to thermal energy

Answer 35

solar collector

Question 36

thermal heat, energy, work are all _____

Answer 36

related

Question 37

study of relationships between thermal energy, heat, and work

Answer 37

thermodynamics

Question 38

you ____ energy of a system whenever you do work on that system or heat that system

Answer 38

increase

Question 39

if the mechanical energy of a system is constant the increae in the thermal enrgy of that system = the sum of the thermal enegry transfers into that system and the work done on that system

Answer 39

the first law of thermodynamis

Question 40

how to increase temp system

Answer 40

heat system

Question 41

system isolated

Answer 41

if no enrgy trasnfers with system and its surroundings

Question 42

system non isolated

Answer 42

if no enrgy trasnfers with system in its surroundings

Question 43

energy spontaneously spreads from regions of higher to lower concentration

Answer 43

second law of thermodynamics

Question 44

device that converts some therm. energy to mech. energy

Answer 44

heat engine

Question 45

heat engine that burns fuel inside a set of cylinders

Answer 45

internal combustion engine