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Wearing down of pencil lead is a physical change because the substance is still the same (graphite), just in a different form (smaller pieces). No new substances are formed during the process, making it reversible by simply sharpening the pencil to create a new point.

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1y ago

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Is breaking pencil a chemical change?

Sharpening a pencil is a physical change, because there is no change to the chemical makeup of the pencil when sharpening it. It is simply chunks of wood being sliced off to reveal more of the lead.It is a physical change.


What gets created by the physical processes that change Earths surface by pushing its crust up or wearing it down?

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Although they both still have the same basic elements (i.e. pencil and lead vs water), there is a physical state change that occurs when you freeze water to make ice. Sharpening/shaving down a pencil only results in a difference of shape and size. It's about the same as ripping paper vs burning paper. Also, freezing water to make ice is a reversible change (you can melt ice to turn it back into water) and shaving a pencil is an irreversible change (you can't sharpen a pencil and then put the pencil shavings back onto the pencil.)


What gets created by the physical process that change earth's surface by pushing its crust up or wearing it down?

Mountains are created by the physical process of pushing the Earth's crust up, while valleys and canyons are formed by the process of wearing down the crust through erosion.


What is the wearing down of rocks by blowing sand called?

physical weathering?


Is breaking down a physical or a chemical properties?

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A car battery runs down a physical change or chemical change?

i tink that it is a physical change


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physical


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Is the intestines breaking down food a physical change or a chemical change?

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