9 weeks review biology
what is the range of pH values in an acidic solution
0-7
what two types of atoms make a covalent bond
2 nonmetals
on which axis would you place the independent variable
X
on which axis would you place the dependent variable
Y
tastes sour
acids
what word describes when a water is attracted to other substances
adhesion
which of these is most likely an enyzme (based on the suffix)
amylase
what tool do we use to measure mass
balance
which type of graph shows the differences among groups
bar
what is a solution that has an excess of hyrdoxide (OH-) ions
base
tastes bitter
bases
which macromolecule is made of simple complex sugars
carbohydrates
which of these do not affect enzyme activity
carbohydrates
all organic compounds contain the element
carbon
what is the term for all condition that stay the same throughout the experiment
constant
which is the group not receiving the test factor
control group
this the responding variable, or the variable you don't control
dependent
which variable in an experiment is the factor being measured (as a response)
dependent variable
which is the monomer (building block) for lipids
fatty acids & glycerol
which of these not a common error when designing experiments
forming a hypothesis
which unit of measure is used for mass
grams
a student wants to test the effects of type of exercise on heart rate. what the is the dependent variable
heart rate
the pH scale is based off of the concentration of________ ions
hydrogen
attractions between water molecules are called
hydrogen bonds
a water strider can skate along the top of a bond because
hydrogen bonds result in water cohesion (surface tension)
what word describes when a molecule is attracted to water
hydrophilic
"if the forest is clear-cut (cutting down all the trees in an area of forest). then it will result in drier soils because there will not be any trees to protect the soil from sunlight" is an example of
hypothesis
which term describes a prediction for one experiment
hypothesis
which variable in an experiment is the factor being tested
independent variable
what happens when the sodium atom loses an electron
it become positively charged
these steroids are classified as
lipids
a neutron has this charge
neutral
which element listed below is not found in lipids
nitrogen
how do you calculate total magnification
objective lens x ocular lens
proton has this charge
positive
what type of Macromolecule are enzymes
protein
covalent bonds
share elections
this is the last step in scientific method
share what you have learned with others
most enyzmes
speed up the chemical reaction
what is the function of nucleic acids
stores genetic information
this is one job proteins do not have in the body
storing genetic information
what is the mass number
the sum of the number of protons and the number of neutrons in the nucleus of an atom
where does the energy from our food originally come from
the sun
ionic bonding involves...
the transfer of electrons
which term describes an idea supported by a large body of evidence (many experiments)
theory
why do ionic bonds form
to fill the outermost energy level
how many are shared in a single bond
w
how are covalent bonds explained
when the atom shares an electron with an another atom
