okay well acually the reason that the leafs change is because their are so many chemicals in that air that the leafs have an affect so than if the leafs cant riseist them somehow sometime they have to die like Savannah akaz GIRL FROM THE DEAD
Because of the seasons. Spring and summer have green leaves and fall has yellow, green, brown etc.. winter has no leaves unless you live on the other side of the world.
the reasons leaves change colors is because of the pigments in the plant cells. pigments called carotenoids (carotene) become the main source of photosynthesis and replace the chlorophyll or at least become more dominant. the carotenoids are usually yellow-orange-red color and the amounts vary depending on the genetics of the plant therefore giving the many different shades in the fall.
the changing of the leaves is signaled by the decreasing amount of daylight as summer turns into fall and fall into winter. its called the a decreasing photoperiod.
The chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible and give the leaves part of their fall splendor. At the same time other chemical changes may occur, which form additional colors through the development of red anthocyanin pigments.
Because the leaf is not burning.
physical change
Chemical
Drying of leaves is a physical change because neither it changes its composition nor does it have any different properties from the original one.
Yes
Some indicators of a chemical reaction are:- change of color- change of odor- release of a gas- change of the temperature- change of the viscosity- formation of a precipitate- change of general appearance- possible explosion - possible chemiluminescence - formation of new compounds
chemical
A color change is only a chemical change if the change is permanent, if the color change is not permanent, then it is likely a physical change. Let's look at Iodine for example (that's pronounced Eye-oh-deen), it is a solid metal that is grayish in color in its solid state, however in its gas state it's a purple or violet color. Once it reverts to its solid state, it turns gray again. This is a PHYSICAL property of Iodine. If the color changed permanently to something else, it would be a chemical change.
Drying of leaves is a physical change because neither it changes its composition nor does it have any different properties from the original one.
a chemical change
Chemical Change.
a chemical change
The change is leaf color is a chemical change.
Yes it is chemical change.
Yes. Research litmus paper.
Yes
Change of shape can not be used to indicate a chemical reaction has happened. Examples of evidence of a chemical reaction are changes in odor or color.
Yes it is a chemical change because it changes structure just like leaves do in the seasons.
I think it is a physical change because if it's a chemical change it would be a whole new substance but it's only a change of color. Re: No it can't be a physical change because it's irreversible. There is a chemical reaction occurring in the leaves, so it should be a chemical change.
Many materials can change colour according to the temperature without there being any chemical reaction taking place.