-Physical and Chemical Change
Chemical changes; One or more substance are changed into new substance that have new and different properties. New color may appear bubbles of gas a solid metrial the change diffcult to impossible to change.
-Elements, Compounds, and Mixtures
Are made of two or more different elements that are bonded togethere.Made of elements in a specific ratio that is always the same.Has chemical formula. Can only be sepereter by chemical means,not physically
Combination of two or more pure substances that are held togethere by physical forces,not chemical
*Metals, Non-Metals, Metalloids
The nonmetals are brittle,not malleable or ductile poor conductors of both heat and electricity.
They tend to be economically important because of their unique conductivity properties
-Law of Conservation of Mass
*Groups: Columns of elements on the periodic table that share common properties.
*Periods: The periodic table has seven horizontal rows.
*Chemical Properties: Describes matter based on its ability to change into a new or different matter
*Atomic #: It is equal to the number of protons in the nucleus
*Atomic Mass: The mass of atom of a chemical element that is equivalent to the number of proton's and neutrons in an atom
*Physical Properties: Can be look at or measured without changing the matter's density.
-Law of Superposition
-Geologic Time Scale
-Precambrian Era: 4.5 billion-570 million years ago, single celled and multi-celled organisms
-Paleozoic Era 570-245 million years ago, sea life the life of first land and plant animals,first amphibians,and first reptiles
-Mesozoic Era 245-70 million years ago, Dinosaurs came and went
-Cenozoic Era 70 million years ago-present day, first human ,Ice age,Modern man evolved, "New Life", climate stabilized 10,000 years ago
-Relative and Absolute Dating
The exact date and time Half-Life/Radioactive Decay
Relative and absolute dating
Law of Superposition
Geologic time scale
*Virus, Bacteria, Fungi, Parasite
Bacteria: single-celled organisms that lack a nucleus;prokarotes
Fungi: mall living organism that can give you ring worm
Parasite: small living organism that moves from host to host
-Epidemic vs. Pandemic
Pandemic: Is a virus that has spread in large community.
Treatment- treat it and get it out of your system and taken care of
-Agriculture, Medicine, Economy
* Farmers get more money if they grow their crops with enhanced chemicals to make them bigger than usual. Bio technologist make medicines more enhanced for better treatment.
* infectious Disease