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rephrase this and make it look like an 8th grader wrote it
My Understanding In chemistry, physical and chemical changes are important ideas that explain how substances change and react. A physical change is when something changes shape or state but stays the same chemically. For example, when ice melts into water, it's still H₂O whether it's solid or liquid, and you can freeze it back into ice, so that change can be reversed. On the flip side, a chemical change happens when new substances with different chemical properties are formed, like when vinegar and baking soda mix and make carbon dioxide gas, seen as bubbles. This means a new substance is created. Signs of a chemical change can be temperature changes, color changes, or gas production, all showing that a chemical reaction occurred and you can’t just go back to what you started with.
My Understanding In chemistry, physical and chemical changes are important ideas that explain how substances change and react. A physical change is when something changes shape or state but stays the same chemically. For example, when ice melts into water, it's still H₂O whether it's solid or liquid, and you can freeze it back into ice, so that change can be reversed. On the flip side, a chemical change happens when new substances with different chemical properties are formed, like when vinegar and baking soda mix and make carbon dioxide gas, seen as bubbles. This means a new substance is created. Signs of a chemical change can be temperature changes, color changes, or gas production, all showing that a chemical reaction occurred and you can’t just go back to what you started with.
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In chemistry, there are two really important ideas: physical changes and chemical changes. A physical change is when something changes its shape or state, but the substance itself stays the same. For example, when ice melts into water, it’s still H₂O, whether it’s solid or liquid. You can freeze the water back into ice, so this kind of change can be undone.
On the other hand, a chemical change happens when new substances are formed that have different properties. A good example is when you mix vinegar and baking soda. This creates carbon dioxide gas, which you can see as bubbles. This means something new has been made! You can tell a chemical change has happened if you notice changes in temperature, color, or if gas is produced. These signs indicate that a chemical reaction took place, and you can’t just go back to what you had before.
On the other hand, a chemical change happens when new substances are formed that have different properties. A good example is when you mix vinegar and baking soda. This creates carbon dioxide gas, which you can see as bubbles. This means something new has been made! You can tell a chemical change has happened if you notice changes in temperature, color, or if gas is produced. These signs indicate that a chemical reaction took place, and you can’t just go back to what you had before.