Activity 1.1

Transcript

Write about a similar problem that you tried to solve. What steps did you take to solve it – use Scientific Method Why Dal is spilled out of the cooker? What You See (Observation) Step 1: See What Happens. You saw dal and foam coming out of the small hole on top of the cooker while it was cooking. It made a mess! ? Ask a Question Step 2: Ask Why. You wonder, 'Why did the dal come out of the cooker? What made it spill?' Make a Guess (Hypothesis) Step 3: Make a Smart Guess. You guess maybe it happened because there was too much dal or water inside, and when it got hot, the steam pushed the dal foam out. Here, we discuss two examples from the book Why the dal has spilled out of the cooker—was there too much water? A bicycle repair person trying to find out why a tyre is flat—from where did the air leak out? Try It Out (Test) Step 4: Try It Out. To see if your guess is right, you try cooking dal again, but this time, you put less dal and less water in the cooker. You make sure not to fill it up too much. What Happened? (Result) Step 5: See What Happens Now. You watch the cooker while the less-filled dal is cooking. This time, the dal does not spill out of the small hole. What You Learned (Conclusion) Step 6: Figure It Out. Because the dal didn't spill when you put less in, you learn that putting too much dal and water in the cooker makes the steam push the foamy dal out and spill! Why tyre is flat - from where does air leak out? What You See (Observation) Hey there! Look at the bike tire. It's all squishy and flat! It doesn't look round and full of air like it should. ? Ask a Question Hmm, that's not right. Why is the tire flat? Where did all the air inside go? Did it sneak out somehow? Make a Guess (Hypothesis) Maybe there's a little hole in the tire or in the part where you put air in (called the valve). A tiny hole would let the air escape slowly. Try It Out (Test) Let's check! We can put the tire in a tub of water or put soapy water all around the tire and the air valve. If there's a hole, we will see bubbles where the air is escaping. What Happened? (Result) Wow, look! When we put the soapy water on one spot of the tire, we see little bubbles forming right there! What You Learned (Conclusion) That's it! The bubbles show us exactly where the air is leaking out. There must be a small hole there causing the tire to go flat. Now we know where the problem is!