Air Flow

Front

Conduction Noun

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[kuhn-duhk-shuhn]

Back

Conduction

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The transfer of energy from one object or substance to another through direct physical contact between their particles.

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Example: Heating one end of a metal bar transfers thermal energy to the cooler end.

Front

Convection Noun

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[kuhn-vek-shuhn]

Back

Convection

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The transfer of thermal energy through the movement of a fluid, such as air or water, in currents.

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Example: Warm water rises and cool water sinks, creating a convection current in the pot.

Front

Radiation Noun

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[rey-dee-ey-shuhn]

Back

Radiation

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The transfer of energy through electromagnetic waves, such as light or heat, which can travel through empty space.

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Example: Energy from the Sun travels to Earth through electromagnetic waves, demonstrating radiation.

Front

Temperature Noun

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[tem-per-uh-cher]

Back

Temperature

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A measure of the average kinetic energy of the individual particles within a substance, indicating how hot or cold it is.

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Example: Particles move faster in warmer areas, showing temperature as kinetic energy.

Front

Infrared Rays Noun

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[in-fruh-red reyz]

Back

Infrared Rays

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A type of electromagnetic radiation with wavelengths longer than visible light, often experienced as heat and absorbed by greenhouse gases.

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Example: Solar radiation, including infrared rays, is absorbed by greenhouse gases, warming the Earth.

Front

Radiant Energy Noun

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[rey-dee-uhnt en-er-jee]

Back

Radiant Energy

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Energy that travels in the form of electromagnetic waves or rays, such as light, heat, or radio waves.

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Example: Sunlight, a form of radiant energy, travels through space to Earth as electromagnetic waves.

Front

Fluid Noun

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[floo-id]

Back

Fluid

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A substance, such as a liquid or gas, that has no fixed shape and yields easily to external pressure.

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Example: The image shows how fluid pressure increases with depth, causing different jet strengths, illustrating fluid behavior in a bottle.

Front

Density Noun

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[den-si-tee]

Back

Density

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A measure of the amount of mass contained within a specific volume; less dense substances tend to rise above denser ones.

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Example: Objects with different densities either sink or float in water, showing how density affects buoyancy.

Front

Greenhouse Effect Noun

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[green-hous ih-fekt]

Back

Greenhouse Effect

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The natural warming process where certain atmospheric gases trap thermal energy, preventing it from escaping into space and heating Earth.

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Example: Solar radiation enters Earth's atmosphere, where gases like CO2 trap heat, warming the planet.

Front

Carbon Dioxide Noun

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[kahr-buhn dai-ok-said]

Back

Carbon Dioxide

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A colorless, odorless gas that is a primary greenhouse gas, produced by burning carbon and by organism respiration.

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Example: The image shows the molecular structure of carbon dioxide (CO2) with one carbon atom and two oxygen atoms.