Propane is a fuel often used for cooking food on backyard grills. it is stored in a tank. if this propane tank is opened inside a house, the atoms in the tank immediately spread throughout the whole house. propane is most likely a solid. liquid. gas. plasma.

Gas

Explanation:

As we know that there are four states of matter which are solid, liquid, gas and plasma.

Solid state : In this state, the molecules are arranged in regular and repeating pattern. The molecules are closely packed that means they are fixed and vibrate in place but they can not move from one place to another.

Liquid state : In this state, the molecules are present in random and irregular pattern. The molecules are closely packed but they can move from one place to another.

Gaseous state : In this state, the molecules are present in irregular pattern. The molecules are not closely packed and they can move freely from one place to another and spread out.

Plasma state : In this state, the atoms lose their electrons at very high temperature. The mixture of electrons and nuclei that result is the plasma state of matter.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.