Science Quiz 10/15

convection

the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.

heat transfer

the movement of thermal energy from one thing to another thing of different temperature

conduction

the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.

thermal energy

Heat energy, the energy an object has because of the movement of its molecules, and heat can be transferred from one object to another object.

how does heat transfer occur in conduction and convection

Heat moves in three ways: Radiation, conduction, and convection. Radiation happens when heat moves as energy waves, called infrared waves, directly from its source to something else. ... When the heat waves hits the cooler thing, they make the molecules of the cooler object speed up.

how does heat effect the density of a substance

Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density

How does heat effect molecule movement

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases.

heat

a high temperature

what are the three ways heat can transfer

conduction (through direct contact), convection (through fluid movement), or radiation (through electromagnetic waves).