Physical Science 20 Heat Test

heat

a form of energy that is transferred between objects or systems

Specific heat capacity

the quantity of heat required to raise the temperature of 1kg of a substance by 1°C

Law of Conservation of Energy

states that energy is neither lost or gained, it is just transferred from one form to another.

Calorimeter

a device used to calculate specific heat capacities, masses, and energy

Calorie

the energy needed to increase the temperature of 1 gram of water by 1°

Phase Change

when the same substance changes states

Latent Heat

energy required to change state

Fusion

process of turning a solid into a liquid

Solidification

process of turning a liquid into a solid

Vaporisation

process of turning a liquid into a gas

Condensation

process of turning a gas into a liquid

Define Kinetic Molecular Theory

Robert Brown observed pollen grains in water under a microscope. He observed that they moved in random jittery motions but could not explain why. At the time, microscopes were not good enough to explain why. Along came Albert Einstein. In 1905 he helped prove mathematically the kinetic molecular theory.

Describe Heat Energy

Thermal energy is transferred via conduction. Heat causes molecules to vibrate. The vibrating molecule then bumps into another directly touching. Vibrating molecules cause heat

Describe the Law of Conservation of Energy

Ex. energy from the sun-> energy in food->use the energy to move, breathe, etc…->loss through sweat, heat leaving body, etc…