heat

A contest to see who is fastest or finishes first

A short match that happens before the main event in sports or shows

During a very emotional moment when people act without thinking

To notice warmth on your skin from the sun or a fire

When you feel strong feelings and act without thinking

Unable to handle pressure or strong criticism

A period of very hot weather that lasts several days

A race result when two or more people finish exactly together

A layer or device that protects a spacecraft from very hot air when it returns to the atmosphere

A strong beam of energy that makes things hot from far away

A lamp that gives off heat to warm people, animals, or food

A condition when you feel dizzy, sick, and weak after being very hot and not drinking enough water

A weapon that follows the heat from a plane's engine to hit it

A machine that moves heat from outside air or the ground into a building to warm it

The movement of warmth from a hotter thing to a cooler thing

The total energy in a system, including energy from pressure and volume

A machine that moves heat between two liquids or gases without mixing them

Heat taken in or given out when a material changes state, such as melting and boiling

A skin irritation with small red bumps that appears when it is hot and humid

A machine that uses heat to make movement or power

A metal part that takes heat away from electronic parts so they do not get too hot

Amount of heat needed to raise one gram of a material by one degree Celsius

The release of heat from a machine or device to prevent overheating

A condition of dizziness, feeling sick, and weakness from losing fluids in hot weather, also called heat exhaustion

A skin rash with small itchy red spots in hot, wet weather

A system that heats a building by sending steam to radiators

Very high temperature that makes metal glow white

Heat from burning natural gas to warm a building

The amount of heat needed to change a solid directly into a gas without becoming liquid

Bright flashes in the far sky at night with no nearby thunder, often on hot evenings

A measure of heat energy like a calorie or BTU

The amount of energy inside a system plus its pressure times its volume

The normal temperature of the human body, about 37°C or 98.6°F

The idea that temperature goes up when particles move faster

The amount of heat needed to change one kilogram of solid to liquid at its melting point without changing temperature

Amount of energy given off for each kilogram when a liquid becomes solid, for example when water freezes

Heat released or taken in when a substance dissolves in a large amount of liquid like water

Amount of energy absorbed or released when a substance changes state like ice melting

Amount of heat needed to turn a liquid into steam without raising its temperature

A very short, strong burst of heat from an explosion that can burn things nearby

A dangerous rise in body temperature after being in very hot conditions

The amount of heat given off when a gas becomes a liquid

Energy needed to break molecules into smaller parts in a hot gas or liquid

The heat released or absorbed per mole when a compound forms from its elements under standard conditions

A material or reaction that takes in heat from its surroundings

A chemical reaction or substance that gives off heat

A speed limit where a plane gets so hot that its parts can be damaged

The number showing how much more heat a material needs at constant pressure than at constant volume

A very high temperature when metal glows red