Grade 2 Science Unit 3 Lesson 3 Investigating

Grade 2 Science Unit: 3 Lesson: 3 Investigating the Effects of Energy

TEKS 2. 6 Force, motion and energy: The student knows that forces cause change and energy exists in many forms. The student is expected to: TEKS 2. 6 A INVESTIGATE THE EFFECTS on an object by increasing or decreasing amounts of light, heat, and sound energy such as how the color of an object appears differently in dimmer light or how heat melts butter.

Here is what you need to be sure to teach!! (found on page 1 of this unit)

Give the students a list of 5 things to touch. file cabinet desk top metal leg of a chair plastic chair carpet

With you writing on the board, have the students list these items from coolest to warmest. List the items from coolest to warmest: 1. file cabinet 2. metal leg of chair 3. desk top 4. plastic chair 5. carpet

Next, have the students record this information in their journals.

Next, come up with a class (accurate) definition for the word HEAT. *a form of energy Consider letting the students draw 2 or 3 pictures of items that produce heat.

This is a teacher demo. *be sure to ask how the lamp is similar to or different from the sun *don’t forget to have the students predict (using pictures and words) what will happen when the tray is placed under the lamp

This is how the lab might look. You need a 100 W bulb!! It takes TIME!!

Journal Entry Idea Students record lab findings

Suggestion: If you use a lamp in your room, it takes TIME for the butter and chips to melt. So, start the lab, go on with your day and record results periodically during the day on the board. Have students record the chart at the end of the day during science. What Happens When I Add HEAT? ? Minutes Under the Lamp ICE BUTTER Chocolate Chips

Then record the “room temp” , “frig” and freezer info in the same fashion: Time @ room temp ICE BUTTER Chocolate Chip Time in frig ICE BUTTER Chocolate Chip Time in freezer ICE BUTTER Chocolate Chip

This is the lab sheet for this activity. You can certainly use the sheet as is…or…….

Consider this…. . Model on the board and have students copy!!!

Since we suggested that you delete the lesson where the students draw pictures, then you will need to delete the “GALLERY WALK”. �So, we suggest you find pictures of different “sources of light energy”.

“We now know there are different sources of light. Now we will explore what happens to an object when the amount of light shining on it is increased or decreased. ”

Needed Materials

How about this as an idea for a center? ? ? � How can increasing and decreasing light energy affect objects?

A Listening Walk

Sound Cups

The same items can be used for both styles of sound cups.

We tried to incorporate all the aspects of the performance indicator within the lessons presented today. So, if you are running short of time, you don’t have to do this.

Thank you for ALL you do for SCIENCE and the kids of MISD!!!