| A | B |
|---|
| Using 1 or more of the senses to perceive objects or events | observing |
| What is all scientific understanding of the natural world based on? | observations |
| Gathering & recording of specific information based on observation | collecting data |
| Process of determining the dimensions, a quantity, or a duration | measuring |
| Putting observatins & measurements in a logical order like a graph, table or chart | organizing data |
| Grouping objects, organisms or phenomena into an organized scheme | classifying |
| Forming a possible explanation for observed events that is testable | hypothesizing |
| Stating in advance the result that will be obtained from testing a hypothesis | predicting |
| A "if-then" statement | prediction |
| Testing a hypothesis or prediction by carrying out data gathering experiments | experimenting |
| Determining if your data is reliable & if it supports your hypothesis | analyzing data |
| Process of drawing conclusions on the basis of facts or premises instead of direct perception | inferring |
| Representation of an object, system or math expression that shows relationship between data | model |
| Definitions limited to repeatable & observable phenomena | operational definitions |
| A general statement that describes a wide variety of phenomena | law |
| The most probable explanation for a set of data based on the best evidence available | theory |
| Instrument that enlarges the image of an object | microscope |
| Refers to the power of a microscope to increase an object's apparent size | magnification |
| Refers to the power of a microscope to show detail clearly | resolution |
| In a microscope, the lens closest to the specimen | objective |
| How much can the most powerful microscope magnify? | 2000 x |
| How do figure out the total magnification in a microscope? | power of eyepiece X power of the objective lens |
| What do scientists use a light microscope to look at? | living organisms & preserved cells |
| What is a disadvantage to using an electron microscope? | can't be used on living things |
| What are two types of electron microscopes? | transmission electron ( TEM) & scanning electron (SEM) |
| What is the magnification of a TEM? | up to 2 million times |
| What is the magnification of a SEM? | up to 50,000 times |
| Besides magnification, what is an advantage of using a SEM over a TEM | produces a 3-D image |
| A population of identical cells grown in a lab | cell culture |
| Scientific technique in which a cell's components are released in a blender | fractionation |
| Technique in which a separated cell is spun at high speeds | centrifugation |
| The separation of chemical components of a substance by passing them in liquid up a piece of paper | chromatography |
| Technique that separates fragments of large molecules on the basis of size & electrical charge | electrophoresis |
| The sharing of information | Communication |
| A logical combination of some of the scientific process may be used to devise a _____ for a research project. | scientific method |
| A technique used to separate chemical components of a substance based on varying rates of movement down a column of beads is called: | chromatography |
| Estimating the number of species in a large region based on the number found in a subregion is called: | sampling |
| In an electron microscope, an electron beam is focused by: | magnets |
| An experiment in which 2 groups differ by only one factor is called: | controlled experiment |
| Data that can be measured in numbers is called: | quantitative |
