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Because x rays and ultraviolet light can change the chemical nature of DNA they are known as?
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Is bouncing a ball a chemical change?
yes No. Nothing changes in its chemical nature.
Why is boiling water a physical change?
Physical change because the water molecules stay unchanged during boiling, also the germination phase helps this be proved correct=)
What energy transformations occurring in a crumpling paper?
The paper can be uncrumpled. There was no chemical change that occurred, so its basic molecular structure is still the same.
Various ways of energy conversion in nature?
Radiation to chemical (plants). Chemical to mechanical (animals). chemical to heat (all living things).
What happens when a substance changes state from a solid or liquid?
This change in the state of matter (liquid to solid) is called freezing.This change in the state of matter (solid to liquid) is called melting.They are physical change, the chemical nature of the molecules is not changed.
X-rays and ultraviolet light can change the chemical nature of DNA?
photosynthesis
How do you know rusting on a nail is a chemical change?
It is a chemical change because the molecular nature is changed; iron become after oxidation an iron oxide.
Is bouncing a ball a chemical change?
yes No. Nothing changes in its chemical nature.
How can you tell chemical change?
The consequence of a chemical change is the modification of the molecular nature.
In a chemical change the identity of matter does not change?
No, the chemical nature of the reactants is changed.
How is chemical change different from physical change?
During a chemical change the nature of substances is changed.
Why is water evaporating in the atmosphere a physical change?
Because the chemical nature of water molecules is unchanged.
Why is salt water considered a physical change?
Dissolution is a physical change because the chemical nature of salt remain unchanged..
X rays ultraviolet light and radioactive substancesthat can chage the chemical nature of DNA are classified as?
mutagens.
What best exhibits a chemical change?
The chemical nature of the molecule is transformed.
How do you know if a change is physical?
An alteration of a substance that does not affect its chemical composition. A change in size and shape would be an example.
Why are sublimation and deposition are classified as physical changes?
Because sublimation and deposition doesn't change the chemical nature of the molecule.
