Science TRUE & FALSE

Tarnishing of silver is an example of endothermic change.

If the chemical properties of a substance remain unchanged and the appearance or shape of a substance changes it is called a periodic change.

A bean plant collecting sunlight and turning it into bean seeds is an example of physical and non-periodic change.

Taking a glass of water and freezing it by placing it in the freezer is a chemical change.

Cutting of cloth is an example of a periodic change.

When lemon juice is mixed with soda water, they produce brisk effervescence

The rate of evaporation is more when the surface area is greater.

Evaporation is a fast process and occurs only at the surface of the liquid.

Adding sugar to milk is a physical change.

The chemical name of baking soda is sodium bicarbonate.

Iron and rust are the same substances.

Iron pipes coated with zinc do not get rusted easily.

Cutting a log of wood into pieces is a chemical change.

Nitrogen gas turns lime water milky.