Mid-Year Review
Chemistry, Earth History, Microorganisms, and Lithosphere
Chemistry-8.O.1- Understand the properties of matter and changes that occur when matter interacts in an open and closed container
- Odor
- Mass
- State
- color
- Volume
- Density
Chemical properties
- flammability
- re-activity
Physical and chemical changes
- Boiling water
- wood chipping
- Ice melting
Chemical Change
- New color appears
- Heat, Light, or sound is given off
- Bubbles of gas are formed
- Difficult or impossible to reverse
Elements, Compounds and Mixtures
Compounds- Are made of 2 or more atoms of different elements that are chemically combined. They can only be separated by chemical means.
Mixtures- Combination of 2 or more pure substances that are held together by chemical mmeans
periodic table
Periods- The horizontal rows on the periodic table
The periodic table in broken into sections of Metals, Metalliods, and Non- Metals
The metals are on the left side of the periodic table and they contain the most metal properties.The metalliods are elements that are have an intermediate amount of metal and non- metal properties. Non- Metals are on the far right side of the periodic table and they are elements that contain no metal properties.
Atomic Number- The number of protons in an element
Atomic Mass- The mass of an atomic particle
Protons- The amount of positive charge in an atom
Neutron- A particle in the atom with about the same mass as the protons but lacking a charge
Electron- A particle within an atom with a negative charge
Law of Conservation of Mass- This law states that Matter can neither be created or destroyed yet it can only be transferred
Vocabulary- Solution, matter, compound, atom, mixture,element,
EARTH HISTORY
Index fossils- A fossil in a rock layer of one geologic age and is used to establish the age of the rock layers
Ice Core- A cylinder of ice that tells us about some characteristics of Earth's history
Geologic Time Scale- A measurement of time that connects the relationship of time and some of the major events in Earth's past
Absolute Dating- The exact age of a rock/ fossil ect.
Relative Dating- Used to determine the age of a fossil by its position in sedimentary rock
Half life/ Radioactive Decay- The time required for an isotope to loose half of its original value
Vocabulary- Absolute dating, Relative dating, Half life, law of superposition, geology, fossil, Index fossil, geologic time scale
INFECTIOUS DISEASES
Virus- A non- living microscopic agent that invades and destroys healthy cells
Bacteria- Microscopic agents that are prokaryotic that cause disease
Fungi- A large group of eukaryotic organisms