By: Amelia Sommer, Madison Jones, Marikit Mendiola, Sean Nguyen Per. 1 INTRO TO BIOLOGY PART 2

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.

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 SCIENCE

Examples: Biology Geology Microbiology zoology

PROCEDURE WRITING Write each step out Make it detailed Conclusion should be precise and to the point

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

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

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 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

LABELED MICROSCOPE

Review (answers on final slide) MULTIPLE CHOICE Q’S

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

Match the word with the definition: 1) Anthropology 2) Gymnosperm 3) Cytology 4) Hypodermic (prefix and suffix list on slide #4) A) study of cells B) study of humans C) uncovered seed D) below skin QUESTION #2

Match each with the definition: 1) quantitative 2) qualitative 3) biology 4) neuralgia A) descriptive data B) study of life C) numeric data D) nerve pain QUESTION #3

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 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 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

Match each letter with the correct number 1) diaphragm 2) objective lense 3) eye piece 4) base QUESTION #7

QUESTION #8 What does the prefix carn- mean? A) ten B) lungs C) eat D) meat

QUESTION #9 True or false Grow and develop is a characteristic of a living thing Qualitative is numeric data

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

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 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 ANSWER KEY