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What possible physical trait may not change in humans as they grow old?
Nails
Differentiate physical and chemical change?
A physical change is reversible or temporary and a chemical change is permanent.Chemical change is a change that imply modifications in the structures of molecules; new compounds appear.Ex.: burning of coal with releasing of carbon dioxide and water.Physical changes don't imply the structure modification of the molecules but only the state of matter, form, dimensions; the chemical compound remain unchanged.Ex.: grinding of coal to be used in a thermal power unit.
What processes separates a mixture according to the chemical properties rather than the physical properties of the components of the mixture?
Burning old wooden boards to recover the nails and screws embedded in them.
What happens when materials undergo physical change?
Physical Change ➢ In physical change, only form or state, size, or shape changes. Example: If a piece of paper is cut up into small pieces it is still a paper. ( A physical change in the shape and size.) ➢ Does not result in a new material; thus, the new form may be changed back into the old form or state. Example: Water turns to ice and ice melting to water. (Ice and water are both H2O. The identity of the matter is not changed, just the state is being changed.) ➢ Physical change affects the appearance.
What will produce a physical change in one substance and a chemical change in another substance?
A physical change simply alters the shape, size, color and physical state (solid, liquid, gas, plasma state) of a material. Melting ice, boiling water, freezing water, mixing sulphur with iron filings, and even tearing paper will produce physical change. Composition of a substance remains unchanged in case of a physical change.A chemical change involves the breaking of old bonds and the creation of new bonds that hold particles (atoms, molecules) together. In this, a new substance is formed. Rusting of an iron, the formation of white ash of MgO when magnesium wire burns are examples of chemical change.A physical change can be reversed by using physical processes such as evaporation, crystallization, distillation, etc; whereas a chemical change can't be reversed using physical processes.
Why burning of candle is a physical and chemical change?
CHEMICAL
Is Boiling oil a physical change or a chemical change?
Physical ... it's only a state change. Cool it and it reverts to its old condition.
Is a cracker that is getting old a physical or a chemical change?
It is definitely a chemical change
How physical change are useful to people?
because you are a old me is a kid
What is the significance of burning the old year in the poem analysis?
Burning the old year in the poem symbolizes letting go of the past and making way for new beginnings. It represents a fresh start and the opportunity for growth and change.
How can you find an article in the Marco eagle newspaper 10 years ago?
You can try searching the archives of the Marco Eagle newspaper online or contact the newspaper directly. Some libraries or archives may also have physical copies of old newspapers that you can search through.
Is bleaching hair a physical change or chemical change?
when you bleach your hair it is a chemical change,because you are adding the chemical from the bleach to your hair and "you can't change it back to the old". chemical change: you can't change it back to the old and it makes a new subtance. physical change:it does not make a new subtance and it is still the same object.
What possible physical trait may not change in humans as they grow old?
Nails
Is a bleached hair a physical or a chemical change?
when you bleach your hair it is a chemical change,because you are adding the chemical from the bleach to your hair and "you can't change it back to the old". chemical change: you can't change it back to the old and it makes a new subtance. physical change:it does not make a new subtance and it is still the same object.
What is cutting up an old rag a physical change or chemical change?
It is not a chemical change because after cutting the chemical composition remain unchanged.
Differentiate physical and chemical change?
A physical change is reversible or temporary and a chemical change is permanent.Chemical change is a change that imply modifications in the structures of molecules; new compounds appear.Ex.: burning of coal with releasing of carbon dioxide and water.Physical changes don't imply the structure modification of the molecules but only the state of matter, form, dimensions; the chemical compound remain unchanged.Ex.: grinding of coal to be used in a thermal power unit.
What physical change for older people?
Skin: it starts to get wrinkles when they get close to being old.
