The Particle Model of Matter

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Source: Keeley and Cooper (2019). Uncovering Student Ideas in Physical Science: 35 New Matter and Energy Formative Assessment Probes. NSTA Press.

Seven friends were talking about the size of atoms. They wondered how the width (diameter) of a large atom compares to the width (diameter) of an apple. They each used a different analogy. This is what they said:

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I think it is like comparing the width of an apple to the width of a cell.

I think it is like comparing the width of an apple to the width of a basketball.

I think it is like comparing the width of an apple to the length of a school bus.

I think it is like comparing the width of an apple to the length of a football field.

I think it is like comparing the width of an apple to the width across the Pacific Ocean from Los Angeles to China.

I think it is like comparing the width of an apple to the diameter of Earth.

I think it is like comparing the width of an apple to the diameter of the Sun.

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The drawings show different models of air inside a sealed jar. Circle the drawing that best matches how you could draw a model of air inside a jar.

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Todd wondered what would happen if he could remove all the atoms in a metal spoon. He asked his friends what they thought. This is what they said:

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I think you would be left with a spoon made of different matter.

I think you would be left with a substance that held the atoms together.

I think you would be left with the air that was in the space between the atoms.

I think you would be left with nothing.

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