| A | B |
|---|
| hypothesis | a prediction about the outcome of an experiment |
| variables | everything that can change in the experiment |
| control | the part of an experiment that is included as a basis for comparison |
| data | the information about the dependent variable that is recorded |
| dependent variable | the "Y" variable that is measured or counted and recorded |
| controlled factors | parts of the experiment that must be kept the same for all parts of the experiment |
| independent (experimental) variable | the "X" variable; the variable that is being tested, that the scientist chooses |
| nucleus | *control center for cell |
| cell wall | rigid layer on outside of plant cells |
| cell membrane | *thin, flexible skin surrounding cell |
| cytoplasm | gel-like fluid that supports cell structures |
| mitochondrion | powerhouse of cell, releases energy |
| chloroplast | makes food for cell by transforming light energy into food |
| vacuole | stores food and water ; large in plant cells |
| ribosome | protein producing structures |
| cell | *basic unit of life, smallest living unit |
| cell-tissue-organ-organ system-organism | *what is the order of organization , starting with"cell" |
| cell wall and chloroplasts | what two structures are found in plant cells, but not in animal cells |
| endoplasmic reticulum | a network of passageways |
| the process of change from simple to more complex | development |
| an action or change in behavior | response |
| organisms that cannot make their own food | heterotrophs |
| living thing composed of many cells ( ex: human, mouse) | multicellular |
| a change in an organism’s surroundings that causes an organism to react | stimulus |
| the mistaken idea that living things arise from nonliving sources | spontaneous generation |
| the part of an experiment that can change | variable |
| living thing composed of a single cell ( ex: paramecium, amoeba | unicellular |
| organisms that make their own food | autotrophs |
| the basic unit of structure and function in living things | cell |
| maintenance of stable internal conditions | homeostasis |
| cell structure in which photosynthesis takes place | chloroplast |
| cell structure in which respiration takes place | mitochondrion |
| growth | an organism increases in size |
| development | an organism becomes more complex |
| excretion | the process of removing waste products from a cell or multicellular organism |
| respond | notice and react to changes in the environment, or to internal conditions |
| stimulus | a change in the environment that causes a change in behavior |
| reproduce | create the next generation |
| homeostasis | maintain stable internal conditions |
| organism | a living thing |
| organelle | a structure inside a cell that has a specific function |
| an example of response | you blink when a bright light shines in your eyes |
| eye piece | part you look through, contains magnifying lens |
| objective | part that contains main magnifying lens |
| body tube | tall, cylindrical shape, moves up and down to focus |
| coarse adjustment | used to begin focusing |
| fine adjustment | used to fine-tune focus |
| revolving nosepiece | holds objectives, allows you to switch objectives |
| arm | C-shaped part that connects the stage and the body tube |
| stage | flat surface that supports the slide |
| stage clips | hol the slide in place |
| diaphragm | directly under the stage, controls light that reaches the slide |
| mirror or light | under the diaphragm, directs light towards the hole in the stage |
| slide | rectangle of glass or plastic |
| with a hand on the arm and a hand on the base | How do you carry a microscope? |
| base | bottom part of the scope, sits on table |
| low power objective (short one) | What objective do you begin to focus with? |
| that the objective never touches the slide | When focusing under high power, what must you watch? |
| Never let mirror catch direct sunlight | What personal safety rule must be observed? |
