Biology Florida EOC (1) with Complete
Solutions
Independent Variable - ANS-- what is being changed or tested during experiment;
cause
Dependent Variable - ANS--what is being measured or observed during experiment;
effect
Control Variable - ANS--use as the comparison "group" in an experiment
What makes an experiment reliable? - ANS--has been tested numerous times by more
than one scientist
-it follows steps of scientific method
-no bias
-information came from third party
-study been retested
-results are published in scientific journal
Theory - ANS--are subject to revision and modification over time
Laws - ANS--developed when observations around the world are tested and retested
until there is a consensus in a scientific community; not changed over time
Dissection Light Microscope - ANS--lowest magnification for microscopes
-views organs and tissues during dissection
-views 3D specimens
Compound Light Microscope - ANS--40x to 400x
-views tissue samples, blood, microorganisms, and larger details of some cells
-common classroom microscope
Transmission Electron Microscope - ANS--passes a beam of electrons through a thin
specimen
-mainly used to study internal structures of cells that cannot be viewed under light
microscopes
Scanning Electron Microscope - ANS--electron beam passes over specimens surface
that is coated with thin layer of gold metal
-studies details of specimen's surface
-3D and black&white
, Polar Molecules - ANS--have an end that is slightly positive and an end that is lightly
negative
-water
Hydrogen Bonding - ANS--attraction between the slightly positive hydrogen of one
molecule and the slightly negative oxygen of another water molecule
Surface tension - ANS-elastic-like forces existing on the surface of a liquid caused by
asymmetry in the attractive forces between the liquid molecules
Cohesion - ANS-when two like substances attract to one another
Adhesion - ANS-when two unlike substances attract
universal solvent - ANS-water can dissolve into many substances: ionic compounds and
polar molecules dissolve easily in water
water____ when it freezes - ANS-expands
frozen water is ____ dense - ANS-less
high specific heat - ANS-can absorb a lot of energy before changing temperature
nucleic acids - ANS--made of nucleotides
-codes to make protein
-ex: DNA and RNA
lipids - ANS--fats that store energy and insulation
-phospholipids are cell membrane
proteins - ANS--made of amino acids
-structure, movement defense,signaling,etc
carbohydrates - ANS--made of monosachharides
-energy,structure
enzymes - ANS--biological catalyst that speeds up rate of reactions by lowering
activation energy
-not used up during reaction
-are affected by environmental factors, like pH and temp.
cell theory - ANS--all living things are made of cells
-cell is basic unit of structure and living things
-new cells are produced from existing cells
Solutions
Independent Variable - ANS-- what is being changed or tested during experiment;
cause
Dependent Variable - ANS--what is being measured or observed during experiment;
effect
Control Variable - ANS--use as the comparison "group" in an experiment
What makes an experiment reliable? - ANS--has been tested numerous times by more
than one scientist
-it follows steps of scientific method
-no bias
-information came from third party
-study been retested
-results are published in scientific journal
Theory - ANS--are subject to revision and modification over time
Laws - ANS--developed when observations around the world are tested and retested
until there is a consensus in a scientific community; not changed over time
Dissection Light Microscope - ANS--lowest magnification for microscopes
-views organs and tissues during dissection
-views 3D specimens
Compound Light Microscope - ANS--40x to 400x
-views tissue samples, blood, microorganisms, and larger details of some cells
-common classroom microscope
Transmission Electron Microscope - ANS--passes a beam of electrons through a thin
specimen
-mainly used to study internal structures of cells that cannot be viewed under light
microscopes
Scanning Electron Microscope - ANS--electron beam passes over specimens surface
that is coated with thin layer of gold metal
-studies details of specimen's surface
-3D and black&white
, Polar Molecules - ANS--have an end that is slightly positive and an end that is lightly
negative
-water
Hydrogen Bonding - ANS--attraction between the slightly positive hydrogen of one
molecule and the slightly negative oxygen of another water molecule
Surface tension - ANS-elastic-like forces existing on the surface of a liquid caused by
asymmetry in the attractive forces between the liquid molecules
Cohesion - ANS-when two like substances attract to one another
Adhesion - ANS-when two unlike substances attract
universal solvent - ANS-water can dissolve into many substances: ionic compounds and
polar molecules dissolve easily in water
water____ when it freezes - ANS-expands
frozen water is ____ dense - ANS-less
high specific heat - ANS-can absorb a lot of energy before changing temperature
nucleic acids - ANS--made of nucleotides
-codes to make protein
-ex: DNA and RNA
lipids - ANS--fats that store energy and insulation
-phospholipids are cell membrane
proteins - ANS--made of amino acids
-structure, movement defense,signaling,etc
carbohydrates - ANS--made of monosachharides
-energy,structure
enzymes - ANS--biological catalyst that speeds up rate of reactions by lowering
activation energy
-not used up during reaction
-are affected by environmental factors, like pH and temp.
cell theory - ANS--all living things are made of cells
-cell is basic unit of structure and living things
-new cells are produced from existing cells
