Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
The Science of Bio
9th Grade Science Test 1
| Question | Answer |
|---|---|
| science | an organized way of using evidence to learn about the natural world |
| observation | process of gathering information about events or processes in a careful, orderly way |
| data | info gathered from observations |
| inference | a logical interpretation based on prior knowledge or experience |
| hypothesis | a proposed scientific explanation for a set of observations |
| spontaneous generation | the idea that life could arise from nonliving matter |
| Redi's Experiment | Redi had two jars with meat in them, covered one with gauze and left the other uncovered. uncovered had maggots, covered did not |
| controlled experiment | an experiment in which only one variable is changed at a time |
| manipulated/independent variable | the variable that is deliberately changed |
| responding/dependent variable | the variable that is observed and that changes in response to the manipulated variable |
| Anton van Leeuwenhoek discovered.... | animalcules/microorganisms |
| John Needhams experiment | sealed a bottle of gravy and heated it. heat killed any living things that might be in gravy. after several days it swarmed with mo's |
| Spallanzani's experiment | boiled two containers of gravy. sealed one left one open. open jar teeming with mo's. sealed jar had none. organisms produced only by existing organisms |
| Pasteur's experiment | designed a flask with a long curved neck filled it with broth and boiled it. no microorganisms. broke neck and mo's appeared. air cant produce life |
| steps of the scientific method | 1) State the Problem 2) Make Observations 3) Make Inferences 4) Form a Hypothesis 5) Perform an Experiment 6) Record Results 7) Conclusion |
| theory | a well tested explanation that unifies a broad range of observations |
| Biology | the science that seeks to understand the living world |
| Characteristics of Living Things | -made up of cells- reproduce- based on a universal genetic code- grow and develop- obtain and use materials and energy- respond to their environment- homeostasis- change over time |
| cell | a collection of living matter enclosed by a barrier that separates the cell from its surroundings |
| sexual reproduction | cells from two diff parents unite to produce the first cell of a new organism |
| asexual reproduction | the new organism has a single parent |
| metabolism | the combination of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes |
| stimulus | a signal to which an organism responds |
| homeostasis | the process by which organisms keep internal conditions constant to survive |
| biosphere | the part of earth that contains al ecosystems |
| ecosystem | community and its nonliving surroundings |
| community | populations that live together in a defined area |
| population | group of organism of one type that live in the same area |
| organism | individual living thing |
| groups of cells | tissues, organs, and organ systems |
| molecules | groups of atoms; smalles unit of mos chemical compounds |
| metric system | a decimal system of measurement whose units are based on certain physical standards and are scaled on multiples of 10 |
| microscopes | devices that produce magnified images of structures that are too small to see with the unaided eye |
| light microscope | produce magnified images by focusing visible light rays |
| electron microscope | produce magnified images by focusing beams of electrons |
| scanning electron microscope | scan a narrow beam of electrons back and forth across the surface of a specimen |
| transmission electron microscopes | shine a beam of electrons through a thin specimen |
| cell culture | a group of cells develop from the single original cell |
| cell fractionation | a technique used to separate the different cell parts |
Created by:
AlanaR
Popular Biology sets