Mid Year Science Review

Chemistry, Earth History, Infectious Diseases

Groups and Periods

Groups- Columns (up & down) of elements on the periodic table that share common properties.

Periods- The periodic table has 7 horizontal rows known as periods.

Physical and Chemical Changes

Physical- A type of change in which the form of matter is altered but one substance is not transformed into another.

Chemical- Any change that results in the formation of new chemical substances.


Atom- The basic building block of matter.

Compound- Substance formed when 2 or more elements are chemically combined.

Matter- Anything that has mass and takes up space.

Solution- A substance made as a result of mixing a solid and a liquid and the solid disolves.

Earth History


Fossil- The trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock.

Fossil Record- A record of the total number of fossils that have been discovered.

Relative- Used to compare things

Absolute- Exact

Unitarianism- The geologic principal that the same geologic process that operate today operated in the past to change earths surface.

Infectious Disease

Bacteria, Fungi, Virus, Parasite

Bacteria- A member of a large group of unicellular microorganisms that have cell walls but lack organelles and an organized nucleus, including some that can cause disease.

Fungi- Any of a group of unicellular, multicellular, or syncytial spore-producing organisms feeding on organic matter, including molds, yeast, mushrooms, and toadstools.

Virus- An infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.

Parasite- An organism that lives in or on another organism (its host) and benefits by deriving nutrients at the host's expense.

How Do I Prevent/Treat microorganism?

How to not get a virus

  • Wash hands
  • Carry around Hand sanatizer
  • Keep your hands off your face
  • Don't let anyone touch your face.


Vaccination- A substance that is injected into a person or animal to protects against a particular disease.

Mutation- A change in the genes of a plant or animal that caused physical characteristics that are different from what is normal.

Vector- A insect, animal, etc that carries germs that cause disease.