Mrs. CoxFreshmen Science

Kinetic Energy:◦ _______________________________

Potential Energy:◦ _______________________________

Thermal Energy:◦ ________________________________

_____________________

_____________________

______________________

Movement of thermal (__________) energy through direct contact of particles.

Occurs in ___________________.

Think about the use of a stovetop to cook foods.

When materials touch, their particles _________ _____________________. Particles with _________ ______________ energy transfer some of their energy to particles with _____________________ energy.

___________ moving particles ______________ with slower moving particles and cause them to move ____________ and have more ______________ energy.

Faster moving particles are slowed down and slower moving particles are sped up.

This continues until all particles are moving about the ____________________ and are at the ___________________________________________.

This particle motion makes the substance ______.

Transfer of heat by movement of matter.

Occurs in ____________ & _______________.

Think about boiling water.

As water is boiled in a pot, water nearest the bottom of the pot gets hot first because it is touching the pot (________________________).

As water heats, the particles in the heated water _________________and spread __________________ ____________ making the water less ____________.

This heated less dense water_________. Cooler, denser water ___________ to take the place of the rising water.

This water, now nearer the bottom of the pot is heated and begins to rise and is again replaced by colder water.

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Convection currents form as a result of the _________________ motion of liquids or gases as a result of differences in their density and temperatures.

Convection currents form ___________ and changing __________________________________.

Convection currents deep inside Earth move materials between Earth’s surface and the mantle.

1. Earth receives energy from the sun by?

2. In what direction does heat move?

3. You use a metal spoon to stir sugar into a cup of hot tea. As you stir you notice the spoon gets hot. What causes the spoon to get hot?