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Biology Final Exam
blah blah blah it's a final exam
48
Science
10th Grade
01/20/2012

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Term
list three goals of science
Definition
-Investigate and understand the natural world-use these explanations to make useful predictions
-explain events in the natural world
Term
Describe the steps scientists take to generate and test a hypothesis
Definition
observation: gathering information about events
Gather Data: the information gathered from observation
Inference: a logical interpretation based on knowledge or experience
Term
list the components of a scientific hypothesis
Definition
prior knowledge-logical inference- informed creative imagination
Term
define controlled expirement
Definition
an experiment in which only one variable can be changed at a time
Term
define a theory
Definition
a well tested explanation that unifies a brood range of observants
Term
what is biology the study of?
Definition
Life
Term
What are the characteristics of all life?
Definition
All living things
Term
define homeostasis
Definition
the process by which most organisms keep internal conditions
Term
define population
Definition
the total number of living things
Term
identify and define the disciples of biology listed in chapter 1 of your text
Definition
observation
Term
describe the uses of a compound light microscope
Definition
you can study dead organisms
Term
describe the uses of a centrifuge
Definition
Spins a tube of cells up to 20,000 times per minute
Term
describe the uses of scanning an electronic microscope
Definition
sem's produce realistic and often dramatic 3d images
Term
list 4 common safety procedures in the laboratory
Definition
follow direction
wash hands before and after
Wear safety goggles
wear a lab apron
Term
what are the three particles that make up an atom? Describe them
Definition
Electron- Negatively charged particle
neutron- Particle with no charge
proton- Positively charged
Term
if an atom contains 11 protons and 12 neutrons, it's atomic number is.......
Definition
11
Term
define compound
Definition
a substance formed by the chemical combination of two or more elements in definite proportions
Term
how is a covalent bond formed?
Definition
when electrons are shared between atoms
Term
what is the most abundant compound in most living things?
Definition
water
Term
which is more acidic a pH of 3.5 or a ph of 3.7
Definition
3.5
Term
what are building blocks of protien
Definition
amino acids
Term
which organic compound is the main source of energy for a living thing
Definition
carbohydrate
Term
what are the building blocks for simple sugars
Definition
monosaccharides
Term
what are the building blocks for DNA and RNA (nucliec Acids)
Definition
Nucleotides
Term
describe the composition of fatty acids
Definition
each carbon atom in a fatty acid chain is joined to another carbon atom by a single bond
Term
list 3 functions of protien
Definition
control of rate
formloone and muscle
help fight disease
Term
what happens to an atom in a chemical reaction
Definition
bond get broken
Term
define chemical reaction
Definition
the process that changes one chemical
Term
describe a catalyst's role in a chemical reaction
Definition
it speeds up the rate of a chemical reaction
Term
how do enzymes affect the reactions in living cells
Definition
enzymes speed up chemical reactions in cells
Term
define ecology
Definition
the scientific study of interaction
Term
define biosphere
Definition
part of earth where life exists like land and water
Term
what is the original source of energy
Definition
sunlight
Term
organisms at the beggining of the food chain is called
Definition
autotrophes
Term
define autotroph
Definition
organisms that can capture energy from sunlight
Term
define food web
Definition
network of complex interactions formed by feeding relationships
Term
define tropic level
Definition
each step in a food chain
Term
define carnavore
Definition
heterotrophs that eats animals
Term
define consumer
Definition
organisms that rely on other organisms for there energy and food supply
Term
give an example of a third level consumer
Definition
a hawk
Term
describe 3 types of ecological pyramids
Definition
energy
bromass
numbers
Term
only 10% of the energy stored in an organism can be passed on the next trophic level
Definition
organisms use it for life
Term
matter cycle through an ecosystem and energy
Definition
flows one away
Term
describe the different processes that cycle and store carbon in the enviroment
Definition
photosynthesis, decomposition, volcanic activity, cutting burning forest
Term
list three organisms that play a direct role in the nitrogen cycle
Definition
bacteria, decomposers, consumers
Term
why are biogeochemical cycles so important to life on earth
Definition
every living organism needs nutrients
Term
how does algae bloom occur
Definition
an aquatic ecosystem receives a large input
Term
define limiting nutrient
Definition
single nutrient that either is scarce or cycles
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