True or False
True or false
Sugar dissolving in water is a chemical change
False
Sugar dissolving in water is a physical change
chemical change, when the candle wick is burning it creates smoke called carbon dioxide.
Zarie decided to light a candle and the wax melted. is the wax melting a physical or chemical change?
A physical change. The wax is still wax it is simply melting.
True or False
The sun making your car feel warm is a physical change
True
The sun making the surface of your car warm is just a physical change of temperature.
is boiling water a physical or chemical change?
Physical
Khalana was mad because someone ate her Chinese Food that she saved from the buffet. so she took all of the nails in the house and soaked it in vinegar. What happened to the nails? is it a physical or chemical change?
False
The acid in your stomach breaking down food is a chemical change
Is a rusty nail a physical or chemical change?
chemical change
Jason wanted to make smores for his camping trip. He burnt his marshmallow in the fire. Is this an example of a physical change or chemical change?
It is an example of a physical change because he burned it.
That black, crispy part is not marshmallow anymore — it’s a new substance called char.
True or False
Physical changes cannot be turned back into its original form
False
Physical changes can be turned back into its original form
Is melting ice cream a physical or chemical change?
Physical
Rosa made Kool Aid for her picnic and poured a gallon of sugar into her water bottle. She left the picnic but forgot her bottle and it sat in the hot sun for days.
She finally remembered and went back to check it, what do you think she saw?
She only saw dry sugar left in it because the water evaporated and that's an example of a physical change.
True or False
an object that goes through a Chemical change cannot be turned back into it's original form.
True
Once an object goes through a chemical change a new substance is formed
Is baking a cake a physical or chemical change?
Chemical
Ethan, of course its Ethan, left his silver battery for his x box controller outside. When he returned it looked red and brown. What do you think happened to make this change? is it a physical or chemical change?
This is an example of a chemical change. His battery was probably exposed to rain and the water caused it to rust.
Rust can happen when metal gets wet and reacts with oxygen in the air