Force, Motion and EnergyWhat is the relationship?

EPISD Middle School Science Standards Based Curriculum 2013-2014

Matter and Energy

Matter is anything that takes up space.

Matter can also be changed into energy.

Force is a push or pull caused by a transfer of energy.

EPISD Middle School Science Standards Based Curriculum 2013-2014

Matter and Energy

• Energy is the ability to do work.

• Force x Distance = Work

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Forms of Energy

There are 2 forms of energy. Potential and Kinetic

• Potential energy is stored energy.

• Kinetic energy involves motion.

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EPISD Middle School Science Standards Based Curriculum 2013-2014

Potential and Kinetic Energy

Consider a roller coaster. • At the top, it has potential energy. The energy is

stored just as the energy in the rubber band. It is energy waiting to be used for motion.

• As the roller coaster moves toward the bottom, kinetic energy increases along with the roller coaster’s speed.

EPISD Middle School Science Standards Based Curriculum 2013-2014

Energy Transfer in a Roller Coaster

EPISD Middle School Science Standards Based Curriculum 2013-2014

Potential and Kinetic Energy

Now consider a human being• Potential energy is stored in

food.• Chemical change produces heat

energy.• Food is fuel that gives us

energyMicrosoft Clipart

EPISD Middle School Science Standards Based Curriculum 2013-2014

Energy in Food

A calorie is a measure of the amount of energy. In food, energy is measured in thousands of calories or kilocalories.

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EPISD Middle School Science Standards Based Curriculum 2013-2014

Transferring Energy in Food

• Food is digested and stored in our bodies as potential energy.

• This potential energy can be transformed into kinetic energy as our bodies move and exercise.

When you exercise, you get hot? What do you think is happening?

EPISD Middle School Science Standards Based Curriculum 2013-2014

The Sun is a Source of Energy

The sun’s energy becomes chemical energy and is stored in plants as potential

energy.

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EPISD Middle School Science Standards Based Curriculum 2013-2014

Forces in Living Things

Seedling emergenceGeotropismPhototropism

Turgor pressure

EPISD Middle School Science Standards Based Curriculum 2013-2014

Forces in Living Things

The force of blood on the walls of arteries is known as blood pressure

The human body forces food throughthe digestive system to absorb nutrientsUsed for energy to do work.

EPISD Middle School Science Standards Based Curriculum 2013-2014