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Biology 9th grade
the study of life
steps to the scientific method (6)
1. identify the problem
2. make a hypothesis
3. create experiment
4. perform experiment
5. analyze data
6. publish lab
what you change in the experiment that will test the subject
the change that is caused by the independant variable.
serves as a standard, or comparison.
system of ideas supported by evidence, and explains many observations
truths that are found across the universe.
bias point of view
What do microscopes do?
enlarge images of small objects
properties of life
metabolism, homostasias, reproduction, hereditary, evolution
sum of all chemical reactions
maintain stable internal conditions
the sexual activity of conceiving and bearing offspring
genetically transmitted or transmittable from parent to offspring
change over time
ocular lens x objective lens
organisms that make their own food
organisms that cannot make their own food
an organism that obtains energy and nutrients by feeding on other organisms or their remains.
An organism that eats producers
An organism that eats primary consumers
organisms that break down wastes and dead organisms and return raw materials to the environment
an organism that makes its own food
animals that prey on others
animal hunted or caught for food
a series of steps in which organisms transfer energy by eating and being eaten
(ecology) a community of organisms where there are several interrelated food chains
each step in a food chain or food web
a group of organisms of the same species populating a given area
a group of interdependent organisms inhabiting the same region and interacting with each other
all the living and nonliving things in an environment including their interactions with each other
Place where an Organism lives
physical use of habitat and function with ecological community
non living things
Conditions in the environment that put limits on where an organism can live
gradual change in living communities that follows a disturbance
the variety of species living within an ecosystem
basic unit of matter
positively charged particle
an elementary particle with 0 charge and mass about equal to a proton
an elementary particle with negative charge
number of protons
protons + neutrons
Formed when one or more electrons are transferred from one atom to another
A shared pair of electrons., a chemical bond that involves sharing a pair of electrons between atoms in a molecule
2 or more substances mixed together in various portions
a mixture in which substances are evenly distributed throughout the mixture
can see different parts of the mixture (salt and pepper)
mixtures when both substances are evenly mixed
dissolves the solute
dissolves in the solvent
A range of numbers used to describe how acidic or basic a solution is; ranges from 0 (most acidic) to 14 (most basic). 7 is neutral
a chemical substance that is present at the start of a chemical reaction
a chemical substance formed as a result of a chemical reaction
protein substances that speed up chemical reactions.
what effects ph?
gives off heat
takes in heat c
(biology) the basic structural and functional unit of all organisms
having cells that lack membrane-bound nuclei
having cells with 'good' or membrane-bound nuclei
what does a plant cell have that an animal cell does not?
a cell wall, chloroplast, central vacuole
what does an animal cell have that a plant cell does not?
a thin membrane around the cytoplasm of a cell
a jellylike fluid inside the cell in which the organelles are suspended
a part of the cell containing DNA and RNA and responsible for growth and reproduction
A membrane bound sac that contains materials involved in transport of the cell.
That portion of the endoplasmic reticulum studded with ribosomes.
That portion of the endoplasmic reticulum that is free of ribosomes. (lipid synthesis occurs here)
a tiny cavity filled with fluid in the cytoplasm of a cell (plant cell
an organelle found in plant and algae cells where photosynthesis occurs
Powerhouse of the cell, organelle that is the site of ATP (energy) production
tails that transport cells through surrounding enviroment
group of cells with similar functions
structures that carry out specialized jobs within an organ system
structure of membrane, two sheets of lipid molcules with tails pointed inward, proteins embedded in bilayer (serve as channels) along with carbohydrate molecules (id markers - recognition)
a process in which a membrane allows some molecules to pass through while keeping others out
when comparing two solutions, the solution with the lesser concentration of solutes
when comparing two solutions, the solution with the greater concentration of solutes
(used of solutions) having the same or equal osmotic pressure
process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated
diffusion of water through a selectively permeable membrane
the movement of materials through a cell membrane using energy
process that releases energy by breaking down glucose and other food molecules in the presence of oxygen
(adenosine triphosphate) main energy source that cells use for most of their work
adenosine diphosphate; molecule that ATP becomes when it gives up one of its three phosphate groups