Does changing the shape of solid matter affect its mass?

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In this lesson, students learn that changing the shape of solid matter, such as modeling clay, does not affect its mass. By measuring the mass of the clay before and after reshaping it, students discover that the mass remains constant because no material is added or removed. This principle applies to other solid objects as well, reinforcing the idea that mass is determined by the amount of material present, regardless of its shape.
  1. What happens to the mass of modeling clay when we change its shape?
  2. Why do you think the mass stays the same even if we make the clay into different shapes?
  3. Can you think of another object that would have the same mass no matter how you change its shape?

Does Changing the Shape of Solid Matter Affect Its Mass?

Understanding Matter and Mass

Have you ever played with modeling clay? It’s super fun to squish and shape! But did you know that no matter how you change its shape, the amount of clay stays the same? Let’s find out why!

Measuring the Mass of Modeling Clay

First, let’s take a ball of modeling clay and put it on a digital scale. The scale tells us that the clay weighs 85 grams. That’s how much clay we have!

Changing the Shape

Now, let’s have some fun and change the shape of the clay. Maybe we can make it into a snake or a pancake. After we change the shape, we put it back on the scale. Guess what? It still weighs 85 grams!

Try Again!

Let’s change the shape one more time. This time, let’s make a star or a cube. When we put it back on the scale, it still weighs 85 grams. Isn’t that cool?

Why Does the Mass Stay the Same?

The reason the mass doesn’t change is because we didn’t add or take away any clay. Mass is the amount of stuff inside something, and since we didn’t add or remove any clay, the mass stays the same!

Fun Fact

Did you know that this rule works for other solid objects too? If you have a piece of paper and you fold it into a paper airplane, the mass stays the same because you didn’t add or remove any paper!

Conclusion

So, next time you’re playing with modeling clay or folding paper, remember that changing the shape doesn’t change the mass. It’s like magic, but it’s really just science!

Keep exploring and having fun with science!

  • Have you ever changed the shape of something, like clay or paper? What did you make, and did you notice if it felt heavier or lighter?
  • Why do you think the mass of the clay stays the same even when we change its shape? Can you think of other things that might work the same way?
  • Imagine if you could change the shape of anything in the world. What would you choose to reshape, and why?
  1. Shape and Mass Experiment: Gather some modeling clay and a small kitchen scale. First, weigh a piece of clay and note its mass. Then, reshape the clay into different forms like a ball, a snake, or a pancake. After each reshaping, weigh the clay again. Discuss with a friend or family member why the mass stays the same even though the shape changes. Can you think of other objects where this might be true?

  2. Paper Folding Fun: Take a sheet of paper and weigh it on a scale. Then, fold it into different shapes, such as a paper airplane or a fan. Weigh the paper after each fold. Talk about why the mass of the paper doesn’t change. Try to find other items at home that you can reshape without changing their mass.

  3. Observation Walk: Go on a walk around your home or school and look for objects that can change shape without changing mass, like a sponge or a towel. Make a list of these items and discuss with a classmate or family member why their mass stays the same even when their shape changes. How many items can you find?

Here’s a sanitized version of the YouTube transcript:

[Music]

Properties of matter: matter and mass. How does changing the shape of matter affect its mass? Let’s use a digital scale to measure the mass of a ball of modeling clay. The ball of modeling clay has a mass of 85 grams.

Let’s change the shape of the modeling clay and measure its mass again. The modeling clay has the same mass of 85 grams. Let’s change the shape again. The modeling clay still has the same mass of 85 grams.

Finally, let’s change the modeling clay back into the shape of a ball. You guessed it, it still has a mass of 85 grams. When the shape of the modeling clay is changed, its mass remains the same.

[Music]

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