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Classification Unit Test
Monday and Tuesday
Get out your notes and
begin review
CRCT Practice September 17, 2014
Leaf cells use chlorophyll to absorb
A.Oxygen
B.Light energy
C.Carbon dioxide
D.glucose
NOTES, September 17, 2014
Atoms are the smallest particle of all matter.
Elements are a type of matter where all the atoms
are the same. Elements can not be broken down.
Example: hydrogen or oxygen
A compound is when two or more elements are
chemically combined. Example: 6H₂O
A molecule is the smallest part of a compound.
H₂O
Four large molecules that support
cell function:
1. Carbohydrates-give energy
2. Lipids-fats, oils, waxes found in
living things
3. Proteins-made of amino acids;
enzymes are types of proteins
that control chemical reactions
4. Nucleic Acids-molecules that
hold the instructions for the
maintenance, growth, and
reproduction of a cell (DNA and
RNA)
36. Organic compounds-compounds
found in all living things in nature.
Only living(or once living) organisms
can contain organic compounds. Hint:
look for the element carbon (C )
37. Inorganic compounds-compounds
found in all nonliving things in nature.
CRCT Practice September 18, 2014
The cells of a redwood tree require
oxygen for the process of
A.Photosynthesis
B.Cellular respiration
C.Fermentation
D.Binary fission
Notes September 18, 2014
Cells must:
Get materials they need into the cell
Get rid of waste products in the cell
Have chemical reactions in the cell
Vocabulary
38. homeostasis- “balanced”; the
number of molecules inside a cell
are the same as the number of
molecules outside the cell
39. diffusion-the movement of
molecules across a cell membrane(in
or out of cell)
40. osmosis- a type of diffusion;
moves ONLY water molecules across
the cell membrane
41. active transport-the movement
of molecules in or out of a cell when
the cell uses energy
42. passive transport-the movement
of molecules in or out of a cell
WITHOUT the cell using energy
(diffusion and osmosis)
Reading pages 56-60; guided
reading
CRCT Practice September 19, 2014
Both a whale and a seaweed use
which of the following to
change glucose into energy?
A.Water
B.Photosynthesis
C.Cellular respiration
D.Bonding
Notes 9/17/14
Chemical energy is provided to all
cells as glucose. Water is needed for
all chemical reactions in a cell.
Osmosis is a special type of diffusion.
Osmosis only moves water molecules
in and out of a cell. This is because
cells need so much water. (passive)
Diffusion is a type of passive transport
that moves molecules in or out of
cell ( carbon dioxide, oxygen…)
Active transport moves molecules but
Must use some the cell’s energy to do
This. Salt moves across a cell’s
membrane this way.
Diffusion of carbon dioxide
Osmosis- WATER ONLY
CRCT Practice September 18, 2014
The process by which water moves across
a cell membrane is
A. Diffusion
B. Active transport
C. Osmosis
D. Facilitated diffusion