Mid-Year Review

Chemistry,Earth History,Infectious Disease,Lithosphere

Chemistry-8.p.1-Understand the properties of matter and changes that occur when matter interacts in an open and closed container.

Physical and chemical properties-

Physical properties can be observed without changing it.,odor,mass,volume,state,color,density.

Chemical properties-Flammability reactivity. Describes on it's ability to change.Also properties can only be observed during chemical change.

Physical and chemical change-

Physical Change-Does not form new substances.

Chemical change-New color appears,heat,light ,or sound is given off.Bubbles are formed.A precipitate is formed.A change occurs that is irreversible.

Elements-Building blocks made of atoms.Most pure substances. Measured by atomic mass, symbol,atomic number.

Compound-Substance formed when two or more elements are combined.

Mixture-Combination of substances that are mixed physical.

Periodic table-List of all the known elements.

Groups and periods-Groups are horizontal rows in the periodic table.Periods are vertical columns in the periodic table.

Metals-Wide range of metals that are found in row 3-12

Metalliods-Share both traits of metals and non-metals found in between the non-metals and the metals.

Non-Metals-Very reactive set of non metals in the upper right part of the periodic table.

Atomic Number-The mass of the element.The atomic number - by the atomic mass = the amount of neutrons the element has.

Protons-Positive charged molecule in an atom.

Neutrons-A neutrally charged molecule in an atom

Electron-Negatively charged molecule in an atom.

Law of conservation-Law that states that matter is not created or destroyed.

Earth History-Understand the history of Earth and it's life forms based on evidence of change recorded in fossil records and land forms.

Law of superposition-Rocks of sedentary rock pile on top of each other to determine the age of the rock layers.

Index Fossil-A fossil found in a rock layer of one geological age and used to determine the age of new rock.

Ice Cores-Ice cores in the earth which are used to measure atmospherics gasses and temperatures from the past.

Geologic Time scale-Scale of the Earth's geologic time measured by eras.

Relative and Absolute Dating-Relative dating is the comparing of two fossils between two intervals.Absolute dating is the exact day and time a fossil became a fossil.

Half life/Radioactive Decay-Time is takes for half of carbon 14 to decay.A Half life is called each time half of the past time occurs.

Infectious Disease

Micro-Organism-A micro organism is a organism that microscopic.Such as a virus,bacteria,fungi,and parasites.