4/7/11

End of Chemistry notes:

Chemical reaction: the chemical composition of matter is changed in a reaction

- in order to have a balanced chamical reaction, the number of each element must be the equal on both sides

REACTIONS NEVER CREATE OR DESTROY MATTER, THEY REARRAGE IT

Photosynthesis:

-Photosynthesis feeds the biosphere

-converts energy from sun energy into chemical energy of organic compounds

-occurs in plants, some protists and some bacteria

-Autotrophs- make own food, need inorganic compounds to make organic compounds, these are the producers

-Heterotrophs- cannot make its own food, they eat, dependent on autotrophs, these are the consumers

Photosynthesis occurs in CHLOROPLASTS (mainly the leaves of a plant)

-double membrane envelope

-inner membrane encloses stroma- fluid where sugars are made

-thylakaids- sacs in stroma

-grana=stacks of thylakaids

Homework: read chapter 7

Next Scribe: bridget :)

4/6/11

Today, the Fast Plant was due, so everyone make sure that you get that in. Also, today we continued some Basic Chemistry Notes (We couldn't do much because of the late arrival). One important note is that molecules, a new term, are groups of atoms that are joined together through chemical bonds. The big thing was the main difference between ionic bonds and covalent bonds, which are both tyes of chemical bonds. Remember that: Ionic bonds involve the transfer of electrons. And covalent bonds involve the sharing of electrons between atoms. Examples: ionic bond = table salt molecules, and covalent bonds = water molecules As a general note: remember that atoms are the basic unit of matter. Elements are substances that are made of only one type of atom. Compounds are substances that are made up of two or more elements. And molecules are particles that are made up of two or more different types of atom. Next scribe = Claire