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Intro to biology part 2. By: Amelia Sommer , Madison Jones, Marikit Mendiola , Sean Nguyen Per. 1. Scientific method. Hypothesis: a testable statement that can be shown to be true or false by experimenting or observation Experiment:

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intro to biology part 2

Intro to biology part 2

By: Amelia Sommer, Madison Jones, MarikitMendiola, Sean Nguyen

Per. 1

scientific method
Scientific method
  • Hypothesis: a testable statement that can be shown to be true or false by experimenting or observation
  • Experiment:

Experimental Group: receives some kind of treatment or condition.

  • Independent Variable: Treatment or factor that is changed

Control Group: receives no treatment, used to compare. It is important to have a control to compare and validate results.

slide3
Cont.
  • Data: a scientist carefully collects and organizes data from the experiment. Data should always be presented in a neat fashion, usually tables.
  • Analysis: Data can be powerfully displayed as a graph
  • Conclusion: Based on the data, a scientist then determines whether the hypothesis was supported or refuted
language of science1
Language of science
  • Examples:
    • Biology
    • Geology
    • Microbiology
    • zoology
procedure writing
Procedure writing
  • Write each step out
  • Make it detailed
  • Conclusion should be precise and to the point
chapter 1 reading guide
Chapter 1 reading guide
  • Quantitative: numeric data
    • 20 cats each weighing 20 lbs
  • Qualitative: descriptive data
    • All the cats are orange with purple stripes, and are soft
slide8
Cont.
  • Controlled variable: factor that is purposely kept the same
    • Ex. Gravy boiled flask
  • Manipulated variable (independent): factor that is purposely changed
    • Flask is either sealed or unsealed
  • Responding variable (dependent): factor that is being observed, which may change in response to the manipulated variable
    • Growth of microorganisms
slide9
Cont.
  • Observation: use of one or more senses to gather information
  • Variables: factor in an experiment that can change
  • Theory: well tested explanation that unifies a broad range of observations
characteristics of living things
Characteristics of living things
  • Made up of cells
  • Reproduce
  • Based on universal genetic code
  • Grow and develop
  • Obtain and use materials and energy
  • Respond to their environment
  • Maintain a stable internal environment
  • Taken as a group and changed over time
multiple choice q s

Multiple choice q’s

Review

(answers on final slide)

question 1
Question #1
  • What is a hypothesis?
    • A) treatment or factor that is changed
    • B) well tested explanation that unifies a broad range of observations
    • C) testable statement can be shown true or false by experimenting or obersvation
    • D) use of one or more senses to gather information
question 2
Question #2
  • A) study of cells
  • B) study of humans
  • C) uncovered seed
  • D) below skin

Match the word with the definition:

  • 1) Anthropology
  • 2) Gymnosperm
  • 3) Cytology
  • 4) Hypodermic
    • (prefix and suffix list on slide #4)
question 3
Question #3
  • A) descriptive data
  • B) study of life
  • C) numeric data
  • D) nerve pain
  • Match each with the definition:
    • 1) quantitative
    • 2) qualitative
    • 3) biology
    • 4) neuralgia
question 4
Question #4
  • Which is the definition of an independent variable?
    • A) factor that is purposely kept the same
    • B) factor that is purposely changed
    • C) testable statement that can be true or false
    • D) factor that is being observed which may change in response to the manipulated variable
question 5
Question #5
  • What does the coarse adjustment knob do?
    • A) holds the slide in place
    • B) moves the stage slightly to sharpen image
    • C) moves the stage up and down for focusing
    • D) used to support the microscope when carried
question 6
Question #6
  • What is the definition of variable?
    • A) use of one or more senses to gather information
    • B) factor in an experiment that can change
    • C) well tested explanation that unifies a broad range of observations
question 7
Question #7

Match each letter with the correct number

  • 1) diaphragm
  • 2) objective lense
  • 3) eye piece
  • 4) base
question 8
Question #8
  • What does the prefix carn- mean?
    • A) ten
    • B) lungs
    • C) eat
    • D) meat
question 9
Question #9
  • True or false
    • Grow and develop is a characteristic of a living thing
    • Qualitative is numeric data
question 10
Question #10
  • Our elephant died this morning. We predicted it was of starvation. To test this hypothesis, we placed three elephants in the wild without food and left them there. 3 weeks later, we came back and the elephants were all still alive. Is the hypothesis proven correct?
    • A) yes
    • B) no
answer key
Answer key
  • 6) Answer is B
  • 7)Answers: 1-D,2-B,3-A,4-C
  • 8) Answer is D
  • 9) Answers: true, then false
  • 10) no
  • 1) Answer is C
  • 2) Answers: 1-B, 2-C, 3-A, 4-D
  • 3) answers: 1-C, 2-A, 3-B,4-D
  • 4) Answer is B
  • 5) Answer is C
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