Practice – Kent_science_yr6_materials_and_changes
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A chocolate bar is left in the Sun, melts, and then later is put in the fridge and becomes solid again. What type of overall change is this? (variant 11)
Select the ONE best answer from the options panel.
reversible, because it can change from solid to liquid and back
irreversible, because it was heated
irreversible, because all heating is permanent
chemical, because it makes new substances
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