Department of Mathematics and Science

Grade 2Big Idea 10: Forms of Energy

Energy Sources

Department of Mathematics and Science

Grade 2 Benchmarks

• SC.2.P.10.1 - Discuss that people use electricity or other forms of energy to cook their food, cool or warm their homes, and power their cars. (Cognitive Complexity/Depth of Knowledge Rating: Low)

• SC.2.N.1.1 - Raise questions about the natural world, investigate them in teams through free exploration and systematic observations, and generate appropriate explanations based on those explorations. (Cognitive Complexity/Depth of Knowledge Rating: High)

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Energy Sources

Objectives: The student will be able to demonstrate understanding of:• Explaining that energy is needed to make objects work.• Describing how people use electricity and other forms of energy at home and school.• Identifying and describing sources of energy.• Naming three different objects and the kind of energy they require.

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Resources• BBC Ages 6-7 Using electricity: http://www.bbc.co.uk/schools/scienceclips/ages/6_7/electricity.shtml

• Energy Activity: Motion http://www.eia.gov/kids/resources/teachers/pdfs/Motion_Energy_Primary.pdf (teacher)

http://www.eia.gov/kids/resources/teachers/pdfs/PrimaryActivityMotionpdf.pdf (student)

• Primary Activity Racing Jars: http://www.eia.gov/kids/resources/teachers/pdfs/primary%20jars.pdf

• School Learning Energy Survey: http://www.eia.gov/kids/resources/teachers/pdfs/SchoolSurveyPrimary.pdf

• Home Learning Energy Survey: http://www.eia.gov/kids/resources/teachers/pdfs/HomeSurveyPrimary.pdf

• Energy and Machines pictures http://www.eia.gov/kids/resources/teachers/pdfs/energy&%20machines_prim.pdf

• Energy Transport http://www.eia.gov/kids/resources/teachers/pdfs/Prim_%20transport%20sort.pdf

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What do you know about Electricity?

• Electricity is used to light our homes • Electricity gives power to machines. • It powers appliances such as refrigerators and

microwaves. • It powers computers and TV’s.• It also powers the toys and games we enjoy. • It’s often used to heat and cool buildings. • Electricity is a kind of energy we use every day.

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Living in an Electrical World

Look around the classroom• Find at least three things that use electricity. • List them in your science notebook.• Raise your hand to share out with the whole

class.• Choose two items from the class list and

explain how each one of them helps us.

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Department of Mathematics and Science

It’s Electricity, a Kind of Energy It makes a light bulb shine. It makes a radio play. It makes an oven bake. What is it?

It makes a washer wash. It makes a dryer dry. It makes a streetlight glow. What is it?

It makes a wall clock tick.It makes a telephone ring.It makes a blender mix.What is it?

It makes a vacuum sweep.It makes a TV play.It makes a doorbell ring.What is it?

It’s electricity—a kind of energy that gives us light and heat and power.

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Department of Mathematics and Science

OUR ELECTRICAL WORLD

Write a StoryDirections: Write a story about how life would be different if there were no electricity.

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Department of Mathematics and Science

Are There Other Kinds of Energy? What are they?

Yes, there are other kinds of energy. Light is a kind of energy. It can come from lamps and TVs. It comes from the sun, too.

The sun is a source of light. It is also a source of heat. You can see the light from the sun. You can feel the sun’s heat energy.

What Kinds of Energy Do Different Things Need?Your body also has energy! You get energy from the food you eat.

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Energy is all around us!Give some examples

– You can see energy as light from the sun or a lamp.– You can feel it as heat warms things up.– You can hear energy as sound when someone

talks.– You can see mechanical energy every time you

move.

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Racing JarsPrimary Activity Racing Jars:

http://www.eia.gov/kids/resources/teachers/pdfs/primary%20jars.pdf

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Department of Mathematics and Science

We Use EnergyWhat energy do these objects use?

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Quiz What is the source that powers

each of these devices (energy users)?

Part A: Device 1. ___________

2. ___________

3. __________

4. ___________

Part B: Energy Source1.

2.

3.

4.

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Hands-On Activity:Measuring Heat

In this activity, students will demonstrate the following Inquiry Skills:• Gather Data Using the thermometer as a tool and

the metric units, Celcius.• Make inferences to draw conclusions.Materials:• · Lamp without a shade• · Thermometer• · Incandescent light bulb• · Compact fluorescent light bulb

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Measuring Heat continued:1. Place a thermometer near the lamp with the bulb

turned off.2. Measure the room temperature and record it on a Data

Chart.3. Switch on the lamp with the incandescent light bulb

screwed into place. Wait 10 minutes.4. After ten minutes, measure the temperature near the

light bulb. Be sure to take the temperature in the exact spot as before and record it on a Data Chart.

5. Switch off the lamp and allow the incandescent light bulb to cool and remove from the lamp.

6. Place the compact fluorescent light bulb in the lamp. Repeat steps 3. – 5.

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Measuring Heat DATA

#1 Incandescent Light Bulb

Room Temperature ______After 10 minutes ______ Difference _______

#2 Compact Florescent Bulb

Room Temperature _______After 10 minutes _______ Difference _______

Compare the temperature differences between the two types of bulbs. Why do you think they are different? Explain using data (evidence).

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EnergyEnergy Sources

• Electrical

• Sun

• Battery

What Happens?

• Lights on. / Machines run.

• Plants grow. / Air warms up.

• Flashlights light up. / Clocks work.

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What are three different sources that energy comes from?

1. Sun

2. Electricity*

3. Batteries

*Be safe: Stay away from electrical outlets!

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Energy Field Studies Trip to the Media Center

In this activity, you will demonstrate the following Inquiry Skills:• Gather data.• Use the appropriate format to record data on a chart

and then make a graph.Materials: • Pencil• Three-column chart with headings “Sun,” “Electricity,”

and “Batteries” for each pair of students (next slide)

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Work with a partner to identify objects that get energy from

electricity, the sun, or batteries

Electricity Sun Batteries

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Energy Field Studies Trip Connected Learning

1. What is something in the Media Center that gets energy from electricity?

2. What did you see that gets energy from the sun?

3. Did you find something that gets energy from batteries?

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Home Learning

1. Look around your home. 2. Make a 3 column chart labeled electricity,

batteries, and solar power3. Work with a parent to identify things that use electricity, batteries, or solar power

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Energy ReviewConnected Learning

1. Why is energy important?We need energy to be able to move. Machines also need energy to

help us do work.2. What do people use electricity and other forms of energy for?

People use electricity for many things, such as washing their clothes, cooking their food, and making light to see at night. They use many other forms of energy, too. They use gasoline to run their cars. They use natural gas to cook their food. They use energy from the sun to power their calculators.3. What are three sources of energy?

Energy can come from the sun, electricity, batteries, or wind.4. What kinds of energy do different things need?

Different things use different kinds of energy. Cars need gasoline. Some toys need batteries. Some things need electrical energy.

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TAG Reflections

• Tell a fact you learned about energy.• Ask a question about something you don’t

understand about energy resources.• Give another idea that was addressed in our

study of energy resources.