physics unit 1

Question 1

types of energy

Answer 1

heat
kinetic
nuclear
sound
light
chemical
electrical
gravitational potential
elastic potential

Question 2

conduction definition

Answer 2

movement of heat through a solid

Question 3

heat flows from ____ to ____ objects

Answer 3

hot to cold

Question 4

convection definition

Answer 4

movement to heat through a liquid

Question 5

convection current process

Answer 5

fluid particles gain energy - more spread out - fluid becomes less dense - fluid particles rises - hot fluid spreads out - molecules cool down - lose kinetic energy - more dense - fluid particles sink

Question 6

radiation definition

Answer 6

movement of hear by infrared electromagnetic waves
doesn’t need particles - can transfer vacuum
black - absorbs
white - reflects

Question 7

evaporation definition

Answer 7

heat is lost when some particles in a liquid becomes a gas

Question 8

energy transfer between stored :

Answer 8

mechanically
electricity
heating
radiation
light/ sound waves

Question 9

power definition

Answer 9

rate of work done

Question 10

what is work

Answer 10

work is said to be done when force applied to a body moves it through a distance ( transferring energy )

Question 11

gravitational potential energy definition

Answer 11

the energy stored in an object when work us done in the moving the object upwards

Question 12

kinetic energy definition

Answer 12

the energy possessed by a body because of its speed and mass