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Smiley chapter one
Science
Question | Answer |
---|---|
What is the goal of science | Investigate, understand, and explain events in the natural world and make useful predictions using that knowledge |
Observation | Gathering information about a task or processes in an orderly way uses 5 senses |
Data | What you gather from observations |
Quantitative data | Numerical info |
Qualitative data | Haveing to do with the quality |
Hypothesis must be _______ | Testable |
Hypothesis is a proposed explanation for a set of _______ | Observations |
What is science continually doing ? | Changing (through technology, through scientists rethinking hypothesis) |
2 ways a hypothesis can be ruled out | More observations, through experimentation |
Six steps of an experimentation | 1. Observation 2. Asking a question 3. Forming a hypothesis 4. Experiment 5. Record data 6. Conclusion |
Step one : asking a question ... What type of question should be asked | Question with a problem to be solved |
Independant variable | Manipulated variable , deliberately changed |
Dependent variable | Changes in response to independent variable |
How should you make a conclusion about the experiment | Evaluate hypothesis, and the recorded results |
An investigation should be ___________ | Repeatable |
Theory | An attempt to explain something, not considered absolute truth |
Biology | The study of life |
Bios | Life |
Logy | The study of |
8 characteristics of all living things | 1. Made of cells 2. Use energy 3. Homeostasis 4. Made up with genetic code 5. Reproduction 6. Growth and development 7. Response to environment 8. Evolution |
Unicellular | Single celled |
Multicellular | Many cells |
Sexual reproduction | Offspring produced by egg and sperm |
Asexual reproduction | Organism created from one organism, exact copy ex: plant |
Metabolism | Chemical reactions through which one builds up and breaks down materials |
Stimulus | Signal to which an organism responds (internal and external) |
Homeostasis | Process by which organisms keep internal conditions constant (shiver, sweat ) |
Metric system | Based on 10, used by most scientists |
Light microscope | Magnified images focusing beams of electrons |
Light compound microscope | Light passes through two lenses, study dead and small living organisms |
Electron microscope | Magnified images by focusing beams of electrons, organism must be dead s |
Transmission | In an electron microscope, can beam through an object |
Cell cultures | Single cell put onto dish , cell reproduces, this allows for cell interactions to be tested |
Cell fractionation | Seperate cell parts, add liquid to tube |