Chemical changes and physical changes are two types of changes that matter can undergo. In a physical change, the substance may change its shape, size, or state (like melting ice), but it remains the same substance, meaning its chemical properties stay the same. In contrast, a chemical change results in new substances being formed, like when iron rusts or when baking a cake. While physical changes are usually easy to reverse, chemical changes often cannot be reversed easily. Both types of changes are important in understanding how materials interact and transform in our world.
in three to five sentences compare and contrast chemical and physical changes. 4th grade
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