Mid-Year Review

Chemistry, Earth History, Infectious Disease

Chemistry- 8.P1- Understand the proprieties of matter and changes that occur when matter interacts in a open and closed container

-Physical and Chemical Properties

-Physical and Chemical Change

-Elements, Compounds, and Mixtures

-Periodic Table

*Groups and Periods

*Metals, Non-Metals, Metalloids

*Atomic Number, Atomic Mass, Protons, Neutrons, and Electrons

-Law of Conservation of Mass


Physical and Chemical Properties

Physical and Chemical Properties

Physical Properties: Odor, Mass, State, Density, Volume, Color. Can be observed or measured without changing it.

Chemical Properties:

Chemical Properties: Flammability, Reactivity. These properties can only be observed during a chemical reaction. Describes matter based on its ability to change into new matter with different properties

Physical and Chemical Change

Physical Change:

Does not form a new substance ( bread and butter),(Chopping up vegetables)

Chemical Change:

One or more substance are changed into new substance that have new and different properties ( A new color appears), (Heat,Light or sound is given off or absorbed), ( The change is difficult or impossible to reverse)

Elements, Compounds, and Mixtures


A substance that cannot be broken down into simpler substance by any chemical means.


Substance formed when two or more elements are chemically combined


Combination of two or more different substance that is mixed but not combined

Periodic Table *Groups and Periods *Metals, Non-Metals, Metalloids *Atomic Number, Atomic Mass, Protons, Neutrons, and Electrons


Go horizontal on the periodic table in columns


similar properties in row of the periodic table

Metal on the period table:

The metals have a moderate range of reativity and a wide range of properties . In general they are shiny and good heat and electricity

Non Metals:

Are not able to conduct electricity and heat very well as non-metals. They are very brillte

and can not be made into wires or pounded into sheets


Metalloids are the elements found along the stair-step line that distinguishes metals from non-metals

Atomic Number:

is a number where you can find it on the periodic table and it tell you the the number of protons and electrons

Atomic Mass:

the mass of an element


found in a atom of an element and the same as the atomic and is part of an atom


Is part of an atom of an element and is the same as the atomic number


found in an atom of an element and can is found by subtracting the atomic mass from the atomic number.

Law of Conservation of Mass:

States that matter can be changed from one form into another, mixture can be separated

Earth History

Law of Superposition

-Index Fossils

-Ice Cores

-Geologic Time Scale

-Relative and Absolute Dating

-Half-Life/Radioactive Decay


Law of superposition:

The postion of undisturbed rock layers like the youngest rock layer is at the top and the oldest rock layer is at the bottom

Index fossil:

A fossil that is useful for dating and correlating the strata in which it is found

Ice cores:

Cylinders of ice obtained into a glacier with different layers of ice are formed over time through build-up of snow. they provide the climates from different periods

Geologic Time Scale:

The period of time covering the physical formation and development of the earth

Relative and absolute dating:

Relative dating is the age of an object in comparison to another without needing to determine its absolute age

Absolute dating is finding the absolute age of that object

Half-life/Radioactive Decay:

The time taken for the radioactivity of a specified isotope to fall to half it's original value.

Infections Diseases


*Virus, Bacteria, Fungi, Parasite

-Epidemic vs. Pandemic




*Agriculture, Medicine, Economy


Microorganism (Virus,Bacteria, Fungi, Parasites)

Virus- small infection that reproduce only inside of living cell and then spreads and can cause disease

Bacteria- Microorganism made up of a single cell that has no distinct nucleus

Fungi- A fungus is any member of a large group of Eukaryota organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms.

Parasites- an organism that lives on or in an organism of another species, known as the host, from the body of which it obtains nutriment.

Epidemic vs. Pandemic:

Epidemic is a widespread out break of an infectious disease within a small population or community.

Pandemic is an out break of an infectious disease that affects large populations.


Prevention can be raising awareness, Education on the disease, Good Hygiene, Vaccines/Antibiotics

Treatment can be seen as treating a diseases but different diseases require different treatment

Biotechnology the use of living cells, bacteria,etc.to make useful products like crops.


ActionsBioScienece.org, BioJobnet.com

Agriculture, Medicine, Economy:

Agriculture the science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products

Medicine the science or practice of the diagnosis, treatment, and prevention of disease

Economy the wealth and resources of a country or region, especially in terms of the production and consumption of goods and services.