Learning Task No. 4: Do the steps below. Write your...

Learning Task No. 4: Do the steps below. Write your observation in the chart. Based on your observations, answer the guide questions. Materials: spoon, margarine, butter Steps: 1. Heat the spoon in a lighted candle. (Seek help from elders.) 2. Put some margarine in the spoon. 3. Heat the spoon with the margarine on it. 4. Observe what happens. 5. Wait for 5 minutes when the margarine cools off. Observe what hap- pens. 6. Place the margarine in a cool place. If you have refrigerator, place it in the chiller. 7. Observe what happened to the margarine. 8. Repeat the same procedure, this time using a butter. 9. Record your observation in the table below. Changes in Materials when Exposed to Temperature Before heating After heating After Cooling margarine butter

Transcript

00:01 In this video, i'm going to be describing a quick experiment involving heating and cooling different substances.

00:09 Okay, so what we're going to be doing is taking an amount of butter and heating it and then cooling it.

00:16 All right, so we'll heat it until it melts, and then we'll cool it until it's solid again.

00:22 We're going to do the same thing with an amount of margarine.

00:26 So we're going to heat it until it melts and becomes a liquid.

00:29 Then we will cool it until it becomes solid again.

00:34 And what we want to do is pair each of the butter and margarine before we've heated it, after we've heated it, and then after we've cooled it again.

00:46 All right, and just look at those qualitative results.

00:51 Okay, so i have a little chart i can fill out.

00:54 Okay, so we can look at margarine and butter before heating, after heating, and after cooling.

00:59 Right, so for my margarine, before heating, it was solid.

01:04 It was a little bit soft of a solid, but solid, and it looked homogenous.

01:09 The same for my butter.

01:10 My butter was also solid.

01:13 It was also harder than the margarine.

01:16 Okay, but it also looked homogenous.

01:18 Okay, and again, my butter was slightly more solid, so it was slightly harder than the margarine.

01:26 After heating, they were both liquid.

01:28 They both became clear.

01:31 The margarine was clearer than the butter, but they did both clarify a bit.

01:37 Margarine stayed as a homogenous, clearish liquid.

01:42 My butter was a clear liquid with it.

01:45 It kind of had like some whitish, not, i don't want to say chunks, but like filmy areas on it.

01:51 Okay, so both were liquid.

01:54 So they're both liquid.

01:55 One was homogenous.

01:56 One was mainly homogenous...

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