which of these surfaces is best at radiating heat?

• black

• blue

• red

• white

which of these surfaces is best at absorbing heat?

• black

• blue

• red

• white

A vacuum flask is able to keep a cold liquid cold because it

• decrease the rate at which heat flows into the liquid

• decrease the rate at which heat flows out of the liquid

• increase the rate at which heat flows into the liquid

• increase the rate at which heat flows out of the liquid

plants grows better in a greenhouse in early spring because

• heat from the sun warms the inside of the greenhouse

• seeds germinate in the spring

• the greenhouse stops too much heat getting to the plants

• the young plants are sheltered from the rain

heat energy is measured in

• degrees

• joules

• newtons

• pascals

which of these does the kinetic theory NOT explain

• condensing of steam

• evaporating of water

• heat coming from the sun

• melting of ice

what happens when one end of a metal bar is heated

• molecules at the heated end move as fast as at the other end

• molecules at the heated end move faster than the other end

• molecules at the heated end moves more slowly than at the other end

• molecules at the heated end move towards the other end

what is the name of the continuous circulating stream of water set up inside a kettle when it is heated

• charging current

• combustion current

• conduction current

• convection current

_____ is the transfer of energy from higher temperature object to lower temperature objects

• Heat

• unit

• touch

• kelvin

the theory that states the more energy particles have, the faster they move

• kinetic theory

• energetic theory

• particle theory

• Celsius theory