Some examples of physical change include ice melting, alcohol evaporating, iron rusting and salt water. A physical change is said to occur when something changes form but keeps the same chemical composition.Know More
It is easy to differentiate between a physical and chemical change. In a physical change, the matter always stays the same and the original matter can be recovered. Salt water, for example, is made by mixing salt and water. Remove the water from the salt and once again, there is salt and water. In a physical change, the particles that make up salt water are simply rearranged, but remain the same.
In a chemical change, the old matter is no longer present and the end product is different. No matter what happens, the original matter cannot be recovered. This is because the particles are broken down and the atoms rearranged to form a new substance. For example, when a piece of paper is burned, it cannot be reformed to become a piece of paper again.
Other examples of physical changes include water evaporating, butter melting, cream being whipped and glass breaking.
Whether a physical or chemical change, mass cannot be destroyed or created. It is always present, but in a different form. Whether or not it can be reversed decides if it is a physical or chemical change.Learn more in Human Anatomy
Early adulthood, a period typically defined as being between the ages of 25 and 40, brings with it a whole host of physical changes, including changes in the reproductive system, skin, hearing and vision, according to Boundless. As the body ages during this period, immune function is also decreased, giving way to sickness and disease in some individuals.Full Answer >
When salt is added to water, it raises the boiling point, requiring the salt water to reach a higher temperature to boil. The boiling point increases as more salt is added to the water.Full Answer >
Children's feet normally keep growing until the growth plates of their bones close. This takes place at age 13 to 15 in girls and age 15 to 17 in boys. Feet tend to spread with age, so an older person may require a larger shoe than when he was younger.Full Answer >
Change your voice by imitation. Choose a role model, listen to how he speaks, and start copying the way that person sounds as he talks. Practice by talking along with a recording of that person speaking.Full Answer >