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STATES OF MATTER

Physical States of Matter :                     Matter is anything that has mass and takes up space. It can be found in three different physical states: solid, liquid, and gas.                    1. Solids have a definite shape and volume. The particles in a solid are tightly packed together and vibrate in place. This is why solids have a fixed shape and cannot be easily compressed.                 2. Liquids have a definite volume but no definite shape. The particles in a liquid are still close together, but they are able to move around each other. This is why liquids can flow and take the shape of their container.                    3. Gases have no definite shape or volume. The particles in a gas are very far apart and move around very quickly. This ...
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PHOTOSYNTHESIS

Photosynthesis :                     Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into oxygen and sugar. It is the foundation of the food chain and the basis for all life on Earth.                     Photosynthesis takes place in the chloroplasts of plant cells. Chloroplasts are small organelles that contain chlorophyll, a green pigment that absorbs sunlight. When sunlight hits chlorophyll, it excites the electrons in the chlorophyll molecule. These excited electrons then flow through a series of proteins called an electron transport chain. As the electrons flow through the electron transport chain, they release energy. This energy is used to pump hydrogen ions across a membrane. The hydrogen ions then flow back down the gradient, and this flow of ions generates ATP, the cell's main energy currency.     ...
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PERIODIC TABLE

PERIODIC TABLE :                       The periodic table is a tabular arrangement of the chemical elements, organized on the basis of their atomic number, electron configurations, and recurring chemical properties. The rows of the table, called periods, generally have metals on the left and nonmetals on the right. The columns, called groups, contain elements with similar chemical properties.                     The periodic table was first developed by Russian chemist Dmitri Mendeleev in 1869. Mendeleev arranged the elements by atomic mass, and he noticed that elements with similar properties fell into groups. He left gaps in his table, predicting that new elements would be discovered with the properties he expected.                     The modern periodic table is based on atomic number, which is the nu...
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