Chemistry, Earth History, Infectious Diseases
Physical and Chemical Properties
Physical and Chemical changes
Elements, Compounds, and Mixtures
Compounds are made of 2 or more different elements that are bonded together and made of elements in a specific ratio that is always the same. Has a chemical formula and can only be separated by chemical means, not physically (H2O, NaCl, CO2).
Mixture are combination of 2 or more pure substances that are held together by physical forces, not chemical
Groups and Periods
Periods are horizontal (left to right) and there is seven of them in the periodic table.
Metals, Non-Metals, and Metalloids
Nonmetal on the right
Metalliod are in the middle on the staircase line.
Atomic number, Atomic mass, Protons, Neutrons, and Electrons
To find neutrons you have to find the atomic mass and round it to the nearest whole number then subtract by the number of protons or electrons.
The periodic table is organized by increasing atomic number.
Atomic mass is the sum of protons and neutrons in the nucleus of an atom.
Law of Conservation of Mass
Law of Superposition
Geologic Time Scale
Relative and Absolute Dating
Relative dating is the age of a rock compared to the ages of rock layers.
Half-Life and Radioactive Decay
Radioactive decay is the process of by which a nucleus of an unstable atom loses energy by emitting ionizing radiation.
Viruses are considered to be non-living and in order for them to reproduce they need a host cell
Bacteria are unicellular and are living and can live without oxygen and in extreme conditions.
Fungi are living and are transmitted by soil and other places and is considered living.
Parasites are living and move on their own from one organism to the next.
Epidemic vs Pandemic
Pandemic is an outbreak of a disease in multiple countries.
Careers for this job are biomanufacturing and biofuels.