Question

1. put a checkmark next to the description if its a chemical change or physical change. chemical change burning paper rust forming on a metal pipe baking a cake activating a glowstick making a salad melting ice

Explanation:

A chemical change results in a new substance being formed, while a physical change only alters the physical state or appearance without changing the substance's chemical composition. Burning paper produces ash and gases, rusting is an oxidation reaction, baking a cake involves chemical reactions of ingredients, and activating a glow - stick involves a chemical reaction to produce light. Making a salad is just combining ingredients physically and melting ice is a change of state from solid to liquid without a new substance being formed.

Answer:

burning paper: $\boxed{\checkmark}$
rust forming on a metal pipe: $\boxed{\checkmark}$
baking a cake: $\boxed{\checkmark}$
activating a glowstick: $\boxed{\checkmark}$
making a salad: $\square$
melting ice: $\square$