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Mcbio ch1
ch 1 notes
| Question | Answer |
|---|---|
| What is science? | * Science investigates questions about the natural world *Finds Answers *Makes predictions based on Evidence |
| Two Types of Observations | Qualitative and Quantitavie |
| Qualitative Observations | characteristics that cannot be quantified: color, texture, etc. |
| Quantitative Observations | measurable characteristics: distance, tempertaure, length |
| Biology | study of living systems |
| spontaneous generation | life from non-living matter *When meat was left out, flies and worms seemed to appear on the meat |
| manipulated variable | what you change in the experiment |
| dependent variable | what changes because of the manipulated variable-this is the data you will be collecting which will support or reject hypothesis |
| hypothesis | educated guess/a proposed scientific explanation for a set of observations |
| contolled variable | something to compare against/doesn't do anything |
| problem | what the experiment is |
| 5 steps of the scientific method | 1. question 2. Form a hypothesis/ must be in an If....Then... statement 3. Set up a controlled experiment/ test only one variable at a time 4. Record and analyze results/ write down observatons reocrd results 5. Draw a conclusion/use the data collected |
| scientific theory | is a hypothesis that has been tested repeatedly and is always confirmed by the results of the test |
| Living things share these characteristics | *made up of cells *reproduce *based on a universal genetic code *grow and develop *use energy *respond to their environmnet *maintain a stable internal environment *change over time |
| cell | collection of living matter enclosed by a barrier that separates the cell from its surroundings/smallest unit of an organism that can be considered alive |
| biology | the study of all living things |
| unicellular | consist of only one cell |
| multicellular | many celled |
| sexual reproduction | two cells from different parents unite to make the first cell of a new organism |
| asexual reproduction | the new organism comes for a single parent |
| Based on genetics | directions for inheritance are carried by a molecule called DNA |
| Living things grow | unicellular: grow in size multicellular: go through development |
| Need Materials for Energy | because living things Grow, they need mateirals in order to develop, grow, reproduce, and survive |
| meabolism | a 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 ex. fire, pesky parents, cold |
| homeostasis | the process by which organisms work to keep internal conditions working properly ex. sweat |
| evolve | individual organisms can adapt in their lifetime by changing actions, but over many generations, a type of organism can evolve |
| living | must carry out the life processes |
| non-living | does not carry out the life processes |
| levels of organization | molecule to cell to group of cell to organism to population to commuinity ot ecosystem to biosphere |
| molecule | group of atoms/DNA |
| cells | smallest functional unit of life |
| groupof cells | tissues, organs, and organ systems |
| organism | individual living thing |
| population | group of organisms of one type that live in the same area |
| community | populations that live together in a defined area |
| ecosystem | community and all its nonliving surroundings |
| biosphere | the part of the Earth that contains all ecosytems |
Created by:
fisher_d
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