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Can a physical change be undone why or why not?
Yes, at least one physical change can be undone: ice can be melted into water, then frozen again into ice.
Can chemical changes be undone using physical means?
No.
What is it called when velocity cahnges?
Acceleration.
Dissolving sugar in lemon water is physical or chemical?
Physical change- it can be undone by evaporating the water.
Is panning a chemical change or physical change?
Panning (for gold) is neither of the above.
Is frezzing water a chemical change or physical change?
Freezing water is a physical change. It can be undone. In all situations, ask yourself if the substance can be undone. If the substance can be undone then it is undergoing a physical change. Freezing the water is only changing its phase, therefore it is only experiencing a physical change.
Is dissolving salt in water a a chemical change or a physical change?
It is a physical change as it can be "undone" by evaporating the water. An simple example of a chemical change is baking a cake, you can't un-bake a cake. To work out whether it is a chemical or physical change just think whether it can be undone or not.
What is a piece of paper is set on fire is this chemical or physical change?
A chemical change. Physical changes can be undone. You cannot unburn paper.
How do environments change?
It cahnges it because it makes as live on earth longer.
Baking a cake is physical change or chemical change?
Chemical change. Physical changes (like melting) can be undone. But you cannot unbake a cake.
Is a cake that is baked in the oven a physical or chemical?
Heat brings about a chemical change. Physical changes can be undone, but you cannot unbake a cake.
What are some examples of chemical and physical changes with their pictures?
physical changes are anything that can be undone, egcrumpling paperchopping woodbuilding with legosfreezing waterboiling waterdissolving salt waterchemical reactions can't be undone, egbaking cookiesthose hot packs for ski tripsputting an alka seltzer in water
