Mid-Year review

Chemistry , Earth history , Infectious diseases

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

Physical and Chemical Properties-Physical can be observed or measured without changing it. Chemical properties can only be observed during a chemical reaction.

Physical and Chemical Change-Physical does not form a new substance. Chemical is when one or more substances are changed into new substances that have new and different properties.

Elements, Compounds, and Mixtures-Elements are the building blocks of matter made of atoms. A compound is a substance formed when two or more elements chemically combine. A mixture is the combination of two or more different substances that are mixed but not combined.

Periodic Table - It is a table of the chemical elements arranged in order of atomic order.

*Groups and Periods- groups are the what they call the vertical row on the periodic table. Periods are what they call the horizontal rows on the periodic table.

*Metals-are on the left these are the most reactive metals.

* Non-Metals-are on the right of the table these are the least reactive.

*Metalloids- they are in the middle these change from metallic to non metallic.

*Atomic Number-The number in which the periodic table is organized.

*Atomic Mass-the sum of protons and neutrons in the nucleus.

*Protons-same as atomic #

*Neutrons- the atomic # minus the atomic mass.

*Electrons-same as the atomic #

Law of Conservation of Mass- when mass cannot be either created or destroyed onle changed from state to state.


Earth history

Law of Superposition-it states that younger rocks are on top and older ones are on bottom

Index Fossils-a fossil that is found in only one of the rock layers

Ice Cores-An ice core is what is typically removed from the ice underground which tells us the climate.

Geologic Time Scale-It is used by geologists and other Earth scientists to describe the timing and relationships between events that have occurred throughout Earth's history.

Relative and Absolute Dating- Absolute dating is the process of determining an approximate computed age in geology.Relative dating is the science of determining the relative order of past events.

Half-Life/Radioactive Decay-the time it takes for 1/2 of the isotopes to decay

Vocab-geology-the study of solid earth

index fossil-a fossil that is found in the rock layers of only geologic age

absolute dating- the process of determining an approximate computed age

ice core-they tell us the climate

relative dating- any method of determining whether an event or object is older or younger than other events or objects

Infectious 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 organism that includes microorganisms such yeasts and molds

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

Epidemic vs. Pandemic-epidemic is a outbreak of a disease within a small population.pandemic is an outbreak of a disease in a large population.

Prevention/Treatment-to prevent a disease you need a vaccination to treat a disease you need antibiotics

Biotechnology-it is the use of living systems and organisms to develop or make useful products

Careers-validation specialist

Agriculture-the science or practice of farming, including cultivation of the soil for the growing of crops.

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

Economy-the wealth and resources of a country or region

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