Biology 9th grade
About this set
Created by:
henleyworthen on December 19, 2010
Description:
Biology
Log in to favorite or report as inappropriate.
Order by
95 terms
Terms | Definitions |
|---|---|
 Biology | 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 |
| independant variable | what you change in the experiment that will test the subject |
| dependant variable | the change that is caused by the independant variable. |
| control | serves as a standard, or comparison. |
| scientific theory | system of ideas supported by evidence, and explains many observations |
| scientific laws | truths that are found across the universe. |
| opinion | bias point of view |
| What do microscopes do? | enlarge images of small objects |
| thermometers.. | measure tempuratures |
| balances.. | measure mass |
| measures length | meter (m) |
| measures mass | gram (g) |
| measures tempurature | farenhite/ celcius |
| measures volume | liter (l) |
| properties of life | metabolism, homostasias, reproduction, hereditary, evolution |
| metabolism | sum of all chemical reactions |
| homostasias | maintain stable internal conditions |
| reproduction | the sexual activity of conceiving and bearing offspring |
| hereditary | genetically transmitted or transmittable from parent to offspring |
| evolution | change over time |
| total magnification | ocular lens x objective lens |
| autotrophs | organisms that make their own food |
| heterotrophs | organisms that cannot make their own food |
| consumers | an organism that obtains energy and nutrients by feeding on other organisms or their remains. |
| primary consumer | An organism that eats producers |
| secondary consumer | An organism that eats primary consumers |
| decomposers | organisms that break down wastes and dead organisms and return raw materials to the environment |
| producer | an organism that makes its own food |
| predators | animals that prey on others |
| prey | animal hunted or caught for food |
| food chain | a series of steps in which organisms transfer energy by eating and being eaten |
| food web | (ecology) a community of organisms where there are several interrelated food chains |
| tropic level | each step in a food chain or food web |
| population | a group of organisms of the same species populating a given area |
| community | a group of interdependent organisms inhabiting the same region and interacting with each other |
| echosystems | all the living and nonliving things in an environment including their interactions with each other |
| habitat | Place where an Organism lives |
| niche | physical use of habitat and function with ecological community |
| biotic | living things |
| abiotic | non living things |
| limiting factors | Conditions in the environment that put limits on where an organism can live |
| ecological succession | gradual change in living communities that follows a disturbance |
| biodiversity | the variety of species living within an ecosystem |
| atom | basic unit of matter |
| proton | positively charged particle |
| neutron | an elementary particle with 0 charge and mass about equal to a proton |
| electron | an elementary particle with negative charge |
| atomic number | number of protons |
| atomic mass | protons + neutrons |
| ionic bond | Formed when one or more electrons are transferred from one atom to another |
| covalent bond | A shared pair of electrons., a chemical bond that involves sharing a pair of electrons between atoms in a molecule |
| organic compound | contains carbon |
| mixutre | 2 or more substances mixed together in various portions |
| homogeneous mixture | a mixture in which substances are evenly distributed throughout the mixture |
| heterogenius mixture | can see different parts of the mixture (salt and pepper) |
| solutes | mixtures when both substances are evenly mixed |
| solvents | dissolves the solute |
| solute | dissolves in the solvent |
| ph scale | 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 |
| reactant | a chemical substance that is present at the start of a chemical reaction |
| product | a chemical substance formed as a result of a chemical reaction |
| enzymes | protein substances that speed up chemical reactions. |
| what effects ph? | tempurature |
| exothermic | gives off heat |
| endothermic | takes in heat c |
| cell | (biology) the basic structural and functional unit of all organisms |
| prokaryotic | having cells that lack membrane-bound nuclei |
| eukaryotic | 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? | vesicals, mitochondria |
| cell membrane | a thin membrane around the cytoplasm of a cell |
| cytoplasm | a jellylike fluid inside the cell in which the organelles are suspended |
| ribosomes | make proteins |
| nucleus | a part of the cell containing DNA and RNA and responsible for growth and reproduction |
| vesicle | A membrane bound sac that contains materials involved in transport of the cell. |
| rough ER | That portion of the endoplasmic reticulum studded with ribosomes. |
| smooth ER | That portion of the endoplasmic reticulum that is free of ribosomes. (lipid synthesis occurs here) |
| vacuole | a tiny cavity filled with fluid in the cytoplasm of a cell (plant cell |
| chloroplast | an organelle found in plant and algae cells where photosynthesis occurs |
| mitochondria | Powerhouse of the cell, organelle that is the site of ATP (energy) production |
| flagella | tails that transport cells through surrounding enviroment |
| tissue | group of cells with similar functions |
| organs | structures that carry out specialized jobs within an organ system |
| lipid bilayer | 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) |
| selective permeability | a process in which a membrane allows some molecules to pass through while keeping others out |
| hypotonic | when comparing two solutions, the solution with the lesser concentration of solutes |
| hypertonic | when comparing two solutions, the solution with the greater concentration of solutes |
| isotonic | (used of solutions) having the same or equal osmotic pressure |
| diffusion | process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated |
| osmosis | diffusion of water through a selectively permeable membrane |
| active transport | the movement of materials through a cell membrane using energy |
| cellular respiration | process that releases energy by breaking down glucose and other food molecules in the presence of oxygen |
| ATP | (adenosine triphosphate) main energy source that cells use for most of their work |
| ADP | adenosine diphosphate; molecule that ATP becomes when it gives up one of its three phosphate groups |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.
Set Champions
Scatter Champion
34.5 secs by safal_lamsal
Space Race Champion
200 points by safal_lamsal