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Smiley chapter one


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
Created by: Ashleigh_rye5321