thunder
state
Chemical, physical is generealy changes between the states of matter, although those are not the only physical changes
They're not the same. They're not the same.
Mostly a physical change. There's really no chemicals from a curling iron its self. Some people use special shampoos to curl their hair. I suggest using the curling iron if you want the curls to last a short time. The chemicals stay in for about a week, so if you want them daily, use the chemicals. But if your head is sensitive, then don't use it for too long.
1979, but it was largely unnoticed until much later, when the change was more drastic
a physical change or a chemical change
Thunder is a physical phenomenon that occurs when lightning heats the air rapidly, causing it to expand and create a shockwave. It is not a chemical change because the composition of the air molecules remains the same before and after the thunder occurs.
A change in a physical property of matter can indicate a physical change, such as a change in state (solid to liquid), color, shape, or texture. These changes do not alter the chemical composition of the substance.
state
Heat, light, and change in odor can indicate a physical change depending on the context. For example, melting ice into water is a physical change because it does not alter the chemical composition of the substance. However, if a substance undergoes a chemical reaction that results in heat, light, and change in odor, then it would be considered a chemical change.
People can
A change in state, such as boiling or melting, does not always indicate a chemical reaction has occurred. It could be a physical change.
No, the bubbles in boiling water for noodles do not indicate a chemical change. The bubbles are formed due to the physical process of water reaching its boiling point and turning into steam bubbles. This is a physical change, as only the state of the water molecules is changing, not their chemical composition.
No, the presence of gas does not always indicate a chemical change. Gas can form due to physical processes such as evaporation or changes in temperature, without any chemical reactions taking place.
property that could be used to indicate physical or chemical change
A physical change
No, milk souring is an example of a chemical change. When milk sours, bacteria ferment the lactose in the milk, producing lactic acid, which changes the composition and properties of the milk. This is a chemical reaction, not a physical change.