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What are the different changes around us?
Changes occur everywhere, every moment around us. Everything in the world is subject to change. There are five types of changes. 1. Chemical and physical changes. 2. Reversible and irreversible changes. 3. Desirable and undesirable changes. 4. Periodic and non-periodic changes. 5. Slow and fast changes. Chemical changes: That change the chemical composition of the material. Physical change: That are temporary and do not change the chemical composition of the material. They change only the state, colour, and texture. Reversible chages: They can be reversed. Irreversible changes: They cannot be reversed. Desirable changes: Which are desired Undeirable changes: Which are'nt desired. Periodic changes: Which happen after a regular intervals. Non-periodic changes: Which happen irregular of any specific interval time. Slow changs: Which take a long time to occur. Fast changes: Which happen quickly. -Param Gupta, Std. 6, Victorious Kidss Educares
Is it excavating of soil is chemical change?
Excavating soil is a physical change, not a chemical change. Chemical changes involve a rearrangement of atoms and result in the formation of new substances, whereas excavating soil simply alters its physical state without changing the chemical composition of the soil.
Is cutting of tree a chemical change?
No. Trees' leaves change colors beacuase when winter comes around, they will not have the energy to keep leaves, so they seal off the leaves from the rest of the tree. When the leaves are cut off from the rest of the tree, the chlorophyll in them dies, and turns brown.
When solid gold is melted does it undergo a chemical change?
No, unless it reacted with a gas in the air around it. Melting is a physical change.
Is egg cooking is a physical or chemical change?
This is a chemical change. Remember: An easy way to determine whether or not a change is chemical or physical is to ask if the process is reversible. Take the evaporation of water into account. When water evaporates, it can condense back into liquid water. It can be reversed because it is a physical change. Chemical changes are often permanent. Take the burning of wood, for example. This is a chemical change. Once you light wood on fire, it turns into gas. Only the trees and plants around you can take this gas and through photosynthesis, turn it back into wood. So it is a non-reversible process, and is a chemical process.
Is breaking a glow stick a chemical or physical change?
It's a chemical change--there's a glass ampule in the glow stick. and it's got one chemical in it. Around it is another chemical. When you break the glow stick the two chemicals mix, and the glow happens.
The difference between a physical and a chemical change?
A physical change the chemical compounds remain the same in the change, in a chemical change the chemical compound changes. A good example is if you move a raw egg around in a pan, some of the egg may separate but it's still a raw egg. If you turn on the heat and cook the egg you are chemically changing the egg and it so no longer a raw egg.
Is flexability physical or chemical?
it is a chemical property because it can move around and move in any direction.
What are some chemical reactions that occur around the house?
They occur often in the kitchen and especially the bathroom. Some of the Chemical changes in a kitchen are: Baking a cake Striking a match Burning toast Spoiling milk Sugar dissolving in tea Printing baking a cake is not an example of chemical its physical
What is the differences between a physical and chemical change in a candle?
The physical change will keep the atoms the same not moving but the chemical change will make it move around with energy.
Describe what happens to a substance when it goes through a physical change?
As a generalization it will change one or more of its physical properties. To be more specific, the substance will change form or shape. Form meaning phase of matter (solid, liquid, etc...). Shape coud refer to just moving its components around into a different geometrical arrangement, however this gets trickier once you get to the atomic level.
At what age does the penis typically undergo physical changes during puberty?
The penis typically undergoes physical changes during puberty around the ages of 12 to 16.
