matter/physical vs chemical changes
<|im_start|>user
Hi<|im_end|>
<|im_start|>assistant
Hello! How can I help you today?<|im_end|>
<|im_start|>user
What's the difference between a physical change and a chemical change?<|im_end|>
<|im_start|>assistant
A physical change is when a substance changes form, but stays the same, like ice melting to water. A chemical change is when a substance turns into something new, like wood burning to ash.<|im_end|>
<|im_start|>user
So, if I crush an aluminum can, is that a physical or chemical change?<|im_end|>
<|im_start|>assistant
That's a physical change. The can is still made of aluminum, but its shape has changed. You can still melt it down and make a new aluminum object.<|im_end|>
<|im_start|>user
And what if I burn a piece of paper? Is that a physical or chemical change?<|im_end|>
<|im_start|>assistant
That's a chemical change. The paper turns into ash, heat, and light, which are all different substances. You can't turn the ash back into paper.<|im_end|>
<|im_start|>assistant
