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Living Environment
First Term Review
94
Biology
9th Grade
12/28/2007

Additional Biology Flashcards

 


 

Cards

Term
low power magnification
Definition
the field of view is larger and brighter
Term
high power magnification
Definition
the field of view is smaller and darker
Term
fine adjustment knob
Definition
used when focusing the microscope under high power magnification
Term
Diaphragm
Definition
adjusts the lighting when using the microscope
Term
Replacement technique
Definition
The liquid or solution can be replaced by adding a new solution at the side of the cover slip while drawing out the original solution by placing a paper towel at the opposite side of the cover slip.
Term
Wet mount slides
Definition

Must be prepared to view live specimens under a microscope. A thin

specimen is placed on a clean glass slide. A drop of water or stain is

 added to the specimen. Then, a cover slip is lowered at an angle to

prevent air bubbles from forming.

Term
The problem
Definition
what is being investigated; written in question form
Term
The hypothesis
Definition
a testable, trial explanation about the answer to the problem; a statement written in sentence form
Term
Valid data
Definition

An experiment must be repeated several times before results are

considered valid.  A large sample size increases the validity of the data. 

Multiple setups should be used for each condition and the results averaged.

Term
A control
Definition

Used for comparison. A negative control is

not expected to change during an experiment, for example the test tube

which contained cream but no lipase showed no color change

during the fat hydrolysis experiment. A positivecontrol will show the

  change expected, for example the test tube with

standard DNA turned purple when heated with diphenylamine. The

spooled DNA from the onion was compared to it.  

Term
independent variable
Definition
the number known before the experiment begins, such as time in minutes. It is placed on the x-axis.
Term
line graph
Definition
used when there are two sets of numerical data
Term
dependent variable
Definition

what is measured in the experiment, such as ml. of oxygen gas produced,

number of heartbeats, cm of stem growth. It is placed on the y-axis.

Term
labeling axes on a graph
Definition
Include the units. Be sure both axes start at zero and are divided into evenly spaced intervals. Use the entire graph grid.
Term
scaling a graph
Definition
Be sure both axes start at zero and are divided into evenly spaced intervals. Use the entire graph grid.
Term
Plotting data
Definition
Don’t connect the line to (0,0) unless there is a point located there. Simply connect the points that you plot on the graph.
Term
bar graph
Definition
Use if one set of data is numerical and one set of data consists of words. Always place the numerical data on the y-axis of the bar graph.
Term
Data tables
Definition
used for organizing scientific data
Term
columns in a data table
Definition

 The first column contains numbers that go in increasing or decreasing

order. The top of each column must be titled and have the units indicated.

Term
pH paper
Definition
can be used to determine the acidity or alkalinity (basicity) of a solution
Term
Neutral pH
Definition
7
Term
Basic
Definition
pH higher than 7
Term
Acidic
Definition
pH lower than 7
Term
Acid solutions
Definition
contain a high concentration of H+ ions and a low concentration of OH- ions.
Term
Basic solutions
Definition
contain a high concentration of OH- ions and a low concentration of H+ ions
Term
variable
Definition

Only a single condition being investigated in an experiment should

differ. Otherwise, conditions in an experiment must be exactly the same

for all test tubes or test subjects.

Term
conclusion
Definition

determined from the data in an experiment and

stated as a complete

sentence.

Term
inference        
Definition

an idea that is supported by the conclusion in an experiment

Term
diaphragm      
Definition

adjusts the brightness of a microscope

Term
Iodine
Definition

an indicator for starch (polysaccharide), amber in color,

will turn blue-black or purple of starch is present, also called

Lugol’s solution or starch indicator solution

Term
Neutralization reaction
Definition

When an acid is added to a base, the pH will gradually

lower until a neutral solution is obtained.  A salt and water forms.

Term
Benedict’s Solution
Definition

an indicator for sugar; changes from blue to orange,

after heating, if sugar is present

Term
Prokaryotic cells         
Definition

lack a nucleus and other membrane-bound organelles

Example: bacteria

Term
Eukaryotic cells
Definition

contain a nucleus

Examples: protists, fungi, plant and animal cells 

Term
Chloroplasts
Definition

found in autotrophic cells; produce glucose during the

process of photosynthesis; contain the light-capturing pigment

called chlorophyll; can be seen with a light microscope;

appear green because chlorophyll reflects the green wavelength of light

Term
DNA
Definition

contained in the nucleus of eukaryotic cells;

made up of nucleotides; genetic information which

guides the formation of RNA


Term
Mitochondria
Definition

where aerobic respiration occurs; powerhouses of the cell;

produce ATP ( the main energy source for chemical reactions

within living cells)

Term
Cell membrane
Definition

a selectively permeable boundary around a cell; regulates which

molecules pass into and out of the cell; composed of lipid

and protein molecules; lipids are arranged in a phospholipid

bilayer with their hydrophobic (water-fearing) tails facing inward

Term
Cell wall
Definition

surrounds the cell membrane and is the outer boundary of plant cells

Term
Diffusion
Definition

the movement of molecules from an area of high

concentration to an area of low concentration;

 

 

 

will occur across a membrane if molecules are small and

uncharged;

Large molecules: starch, other polysaccharides, lipids;

Small molecules: water, glucose, amino acids, glycerol, nucleotides

Term
Osmosis
Definition

the diffusion of water across a cell membrane

Term
Active transport
Definition

occurs when membrane proteins use ATP energy to carry

materials into and out of a cell; the movement of molecules

from an area of low concentration to an

area of higher concentration; large and charged molecules

are moved into cells by active transport; includes phagocytosis

Term
Large surface area
Definition

allows for a fast rate of diffusion into a cell

Term
Enzymes
Definition

protein molecules that catalyze (help) chemical reactions;

usually end in ase

Term
Hydrolysis
Definition

the breaking down of large molecules into smaller

molecules with the addition of water

Term
Dehydration synthesis
Definition

the combining of small molecules to form a larger

molecule with the loss of water

Term
Amino acids
Definition

the building blocks of proteins; contain an

amino group (NH2 ) , a carboxyl group (COOH),

an R (variable group) and an H attached to a central carbon;

there are 20 different kinds

Term
low power magnification
Definition
the field of view is larger and brighter
Term
high power magnification
Definition
the field of view is smaller and darker
Term
fine adjustment knob
Definition
used when focusing the microscope under high power magnification
Term
Diaphragm
Definition
adjusts the lighting when using the microscope
Term
Replacement technique
Definition
The liquid or solution can be replaced by adding a new solution at the side of the cover slip while drawing out the original solution by placing a paper towel at the opposite side of the cover slip.
Term
Wet mount slides
Definition

Must be prepared to view live specimens under a microscope. A thin

specimen is placed on a clean glass slide. A drop of water or stain is

 added to the specimen. Then, a cover slip is lowered at an angle to

prevent air bubbles from forming.

Term
The problem
Definition
what is being investigated; written in question form
Term
The hypothesis
Definition
a testable, trial explanation about the answer to the problem; a statement written in sentence form
Term
Valid data
Definition

An experiment must be repeated several times before results are

considered valid.  A large sample size increases the validity of the data. 

Multiple setups should be used for each condition and the results averaged.

Term
A control
Definition

Used for comparison. A negative control is

not expected to change during an experiment, for example the test tube

which contained cream but no lipase showed no color change

during the fat hydrolysis experiment. A positivecontrol will show the

  change expected, for example the test tube with

standard DNA turned purple when heated with diphenylamine. The

spooled DNA from the onion was compared to it.  

Term
independent variable
Definition
the number known before the experiment begins, such as time in minutes. It is placed on the x-axis.
Term
line graph
Definition
used when there are two sets of numerical data
Term
dependent variable
Definition

what is measured in the experiment, such as ml. of oxygen gas produced,

number of heartbeats, cm of stem growth. It is placed on the y-axis.

Term
labeling axes on a graph
Definition
Include the units. Be sure both axes start at zero and are divided into evenly spaced intervals. Use the entire graph grid.
Term
scaling a graph
Definition
Be sure both axes start at zero and are divided into evenly spaced intervals. Use the entire graph grid.
Term
Plotting data
Definition
Don’t connect the line to (0,0) unless there is a point located there. Simply connect the points that you plot on the graph.
Term
bar graph
Definition
Use if one set of data is numerical and one set of data consists of words. Always place the numerical data on the y-axis of the bar graph.
Term
Data tables
Definition
used for organizing scientific data
Term
columns in a data table
Definition

 The first column contains numbers that go in increasing or decreasing

order. The top of each column must be titled and have the units indicated.

Term
pH paper
Definition
can be used to determine the acidity or alkalinity (basicity) of a solution
Term
Neutral pH
Definition
7
Term
Basic
Definition
pH higher than 7
Term
Acidic
Definition
pH lower than 7
Term
Acid solutions
Definition
contain a high concentration of H+ ions and a low concentration of OH- ions.
Term
Basic solutions
Definition
contain a high concentration of OH- ions and a low concentration of H+ ions
Term
variable
Definition

Only a single condition being investigated in an experiment should

differ. Otherwise, conditions in an experiment must be exactly the same

for all test tubes or test subjects.

Term
conclusion
Definition

determined from the data in an experiment and

stated as a complete

sentence.

Term
inference        
Definition

an idea that is supported by the conclusion in an experiment

Term
diaphragm      
Definition

adjusts the brightness of a microscope

Term
Iodine
Definition

an indicator for starch (polysaccharide), amber in color,

will turn blue-black or purple of starch is present, also called

Lugol’s solution or starch indicator solution

Term
Neutralization reaction
Definition

When an acid is added to a base, the pH will gradually

lower until a neutral solution is obtained.  A salt and water forms.

Term
Benedict’s Solution
Definition

an indicator for sugar; changes from blue to orange,

after heating, if sugar is present

Term
Prokaryotic cells         
Definition

lack a nucleus and other membrane-bound organelles

Example: bacteria

Term
Eukaryotic cells
Definition

contain a nucleus

Examples: protists, fungi, plant and animal cells 

Term
Chloroplasts
Definition

found in autotrophic cells; produce glucose during the

process of photosynthesis; contain the light-capturing pigment

called chlorophyll; can be seen with a light microscope;

appear green because chlorophyll reflects the green wavelength of light

Term
DNA
Definition

contained in the nucleus of eukaryotic cells;

made up of nucleotides; genetic information which

guides the formation of RNA


Term
Mitochondria
Definition

where aerobic respiration occurs; powerhouses of the cell;

produce ATP ( the main energy source for chemical reactions

within living cells)

Term
Cell membrane
Definition

a selectively permeable boundary around a cell; regulates which

molecules pass into and out of the cell; composed of lipid

and protein molecules; lipids are arranged in a phospholipid

bilayer with their hydrophobic (water-fearing) tails facing inward

Term
Cell wall
Definition

surrounds the cell membrane and is the outer boundary of plant cells

Term
Diffusion
Definition

the movement of molecules from an area of high

concentration to an area of low concentration;

 

 

 

will occur across a membrane if molecules are small and

uncharged;

Large molecules: starch, other polysaccharides, lipids;

Small molecules: water, glucose, amino acids, glycerol, nucleotides

Term
Osmosis
Definition

the diffusion of water across a cell membrane

Term
Active transport
Definition

occurs when membrane proteins use ATP energy to carry

materials into and out of a cell; the movement of molecules

from an area of low concentration to an

area of higher concentration; large and charged molecules

are moved into cells by active transport; includes phagocytosis

Term
Large surface area
Definition

allows for a fast rate of diffusion into a cell

Term
Enzymes
Definition

protein molecules that catalyze (help) chemical reactions;

usually end in ase

Term
Hydrolysis
Definition

the breaking down of large molecules into smaller

molecules with the addition of water

Term
Dehydration synthesis
Definition

the combining of small molecules to form a larger

molecule with the loss of water

Term
Amino acids
Definition

the building blocks of proteins; contain an

amino group (NH2 ) , a carboxyl group (COOH),

an R (variable group) and an H attached to a central carbon;

there are 20 different kinds

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