Next-Gen

Biology

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by SchnerJackie1
Last updated 3 years ago

Discipline:
Science
Subject:
Biology
Grade:
9

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Biology

FactsAtoms are so small that a billion of them could fit on the head of a pin. The two main types of bonds are covalent and ionic bonds.A mixture is a combination of two or more substences in which each substence retains its individual characteristicsCarbon atoms can bond together in straight chains, branched chains, or ringsCarbon is a component of almost all biological substences

BilologyChapter 6

Atoms, Elements,& CompoundsAtoms are the building blocks of all matter.Elements are substences that can not be broken down by a physical or chemical reation, they are pure.Atoms of the same element have the same number of protons and electrons, when they have a different number of neutrons they are called isotopes. A compond is formed when two or more elements combin forming a pure substence, like water.

.Water & SolutionsWater is one of the most important molecule for life. Water is a polar molecule. Polar molecules are molecules that have an unequal distribution charge. Scientist have found a way to to figure out how much acid or bases is in a solution, it is called pH. Substences that release H+ in water are acids. Substences that release OH- in water are bases.

.Chemical ReactionAll living things grow, reproduce, and adapt, because of chemical reactions, like photosynthesis. When atoms reorganize into something different it is called a chemical reaction, like when iron rust. Substences can change without a chemical reaction, like when water freezes.Chemical reactions are what occur inside our bodies when our food is turned into glucose.Chemical equations are what scientist use to describe chemical reactions.

The Buliding Blocks of LifeWithout carbon there would be no life on earth. Organisms are made up of carbon-base molecules. Carbon atoms are joined to form carbon molecules.Macromolecules are formed by joining small carbon compounds into polymers. The four types of biological micrmolecules are carbohydrates, lipids, proten, and neucleic acids. Peptide bonds join amino acids in proteins. Chains of nucleotides form nucleic acids.

Fun Facts

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