Nature
Force between two negative masses
The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity. The atmosphere of Earth protects life on Earth by creating …
The quantitative property of light
A leaf (plural leaves) is a dorsiventrally flattened organ of a vascular plant and is the principal lateral appendage of the stem, usually borne above ground and specialized for photosynthesis. The …
The irreversible succession of the past
Time is the indefinite continued progress of existence and events that occur in an apparently irreversible succession from the past, through the present, into the future. Time is a component quantity …
The strange particles in our atmosphere
An atom is the smallest constituent unit of ordinary matter that constitutes a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely …