Basic Energy · Mati Learning Hub

LESSON 4.1 · SC.3.P.10.1

Forms of Energy

Learning goal: Identify light, heat, sound, electrical, and mechanical energy from observable evidence.

What to know

Energy is the ability to cause motion or create a change. We recognize energy by what we observe happening.
Light energy lets us see and can travel from sources such as the Sun, lamps, and screens. Heat energy can make matter warmer or help change its state.
Sound energy begins with vibrations. Mechanical energy is associated with moving objects or objects able to cause motion.
Electrical energy powers many devices. A device can change electrical energy into light, sound, heat, or mechanical motion.
One object often shows several forms at once. Classify each form using evidence—not only the device's name.

WATCH & NOTICE

Forms of Energy for Kids

From Science Class with Mr. O

Make a tally each time you see light, heat, sound, electrical, or mechanical energy.

Open video on YouTube ↗

Think like a scientist

An electric fan uses electrical energy. Its spinning blades show mechanical energy, its hum provides evidence of sound energy, and its motor may become warm.

INTERACTIVE ENERGY DETECTIVE

Find every form—not just the first one

Choose a device, turn it on, and use the observable clues to identify its input and output forms of energy.

Electricalenergy carried by electric currentMechanicalenergy of motionEvidencewhat you observe or measure

Stored chemical energy→

LightHeat

Press Turn on, then watch and listen for evidence.

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LESSON 4.2 · SC.3.P.10.2

Energy Causes Change

Learning goal: Use evidence to explain how energy causes motion or another observable change.

What to know

Energy can start motion, stop motion, change speed or direction, warm or cool matter, make light, or produce sound.
Mechanical energy can push, pull, spin, stretch, compress, or move an object. More input can sometimes produce a larger change when other conditions stay the same.
Heat can raise temperature or contribute to melting and evaporation. Sound can make nearby matter vibrate.
A fair investigation changes one factor, measures the result, and repeats trials. The observed change is evidence that energy acted.
A cause-and-effect explanation names the energy input, the object affected, and the change that was observed.

WATCH & NOTICE

Forms of Energy for Kids

From Science Class with Mr. O

Make a tally each time you see light, heat, sound, electrical, or mechanical energy.

Open video on YouTube ↗

Think like a scientist

Release the same toy car from different ramp heights. If the higher release repeatedly sends it farther, the measured distance is evidence of a larger change in motion.

ENERGY CAUSES CHANGE LAB

Release a car from the ramp

Change only the release height, launch the same car, and compare how far it travels. Repeated measurement turns an observation into stronger evidence.

Motiona change in positionVariablethe factor changed in a testEvidencerecorded observations or measurements

Release height 40 cm

Ready to test

Keep the car and ramp the same. Change only height.

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LESSON 4.3 · SC.3.P.11.1

Light and Heat Sources

Learning goal: Investigate and explain that things giving off light often also give off heat.

What to know

The Sun, flames, incandescent bulbs, and many other light sources also transfer heat to their surroundings.
Often means frequently—not always. Some sources produce much more noticeable heat than others, and some hot objects give off no visible light.
Use evidence from safe temperature measurements or observations made at the same distance and after the same amount of time.
Brightness and temperature are different properties. The brightest-looking source is not automatically the hottest.
Never touch a lamp, flame, or unknown source to test for heat. Use a thermometer and adult-supervised investigations.

WATCH & NOTICE

Forms of Energy for Kids

From Science Class with Mr. O

Make a tally each time you see light, heat, sound, electrical, or mechanical energy.

Open video on YouTube ↗

Think like a scientist

Place identical thermometers equal distances from a switched-on lamp and an unlit comparison area. A higher reading near the lamp supports the claim that the light source also gives off heat.

LIGHT & HEAT INVESTIGATION

Light often comes with heat

Compare sources at the same distance and after the same observation time. Notice that “often” does not mean “always the same amount.”

Light sourcean object that gives off lightHeatenergy moving from warmer to coolerFair comparisonsame distance and time

☀️

Model thermometer after equal observation time38°C / 100°F

Bright lightStrong heat

The Sun gives off both light and heat. Never look directly at it.

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LESSON 4.4 · SC.3.P.11.2

Friction Makes Heat

Learning goal: Investigate, observe, and explain how rubbing two objects produces heat.

What to know

Friction is a force that resists motion when two surfaces touch and slide across one another.
Rubbing transfers some mechanical energy into heat, so the surfaces can become warmer.
Faster rubbing, longer rubbing, or rougher contacting surfaces may produce a larger temperature increase.
A fair friction test keeps the materials and starting temperature the same, changes one factor, then compares measurements.
Friction is useful in brakes, shoe soles, and warming hands, but too much friction can wear materials or cause unsafe heat.

WATCH & NOTICE

Forms of Energy for Kids

From Science Class with Mr. O

Make a tally each time you see light, heat, sound, electrical, or mechanical energy.

Open video on YouTube ↗

Think like a scientist

Measure a cloth and block before rubbing, rub them together for a fixed time, and measure again. A repeated temperature rise is evidence that friction produced heat.

FRICTION HEAT LAB

Rub, measure, explain

Set the speed, time, and surface pair. The model begins at room temperature and predicts the temperature change caused by rubbing.

Frictiona force opposing sliding surfacesTemperaturea measure of hot or coldControlled testchange one factor at a time

Rubbing speed MediumRubbing time 10 secondsSurface pair

Predicted ending temperature25°C / 77°F

Press Rub surfaces to run the investigation.

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What to know

Forms of Energy for Kids

Think like a scientist

Find every form—not just the first one

What to know

Forms of Energy for Kids

Think like a scientist

Release a car from the ramp

What to know

Forms of Energy for Kids

Think like a scientist

Light often comes with heat

What to know

Forms of Energy for Kids

Think like a scientist

Rub, measure, explain

Unit 4 benchmark map