Today is Tuesday 820 Learning Target I can

Today is Tuesday 8/20 Learning Target: I can write a hypothesis in if, then, because format. Warmup: What is the independent variable and the dependent variable in this testable question: Will adding extra sugar to Kool Aid cause it to freeze faster? You will need: � � � Pencil Piece of paper Science NOTEBOOK(remember to keep all you science things in there) Homework: Hypothesis and Variables Practice (if not finished in class)

Writing a Hypothesis �With your table, read the handout given to you on writing a hypothesis. Then find and write down the following info in your notes: ▪ Hypothesis Definition ▪ Hypothesis format ▪ An example of a correct hypothesis

HOW TO WRITE A HYPOTHESIS ▪ A hypothesis is a tentative explanation (a possible explanation) for an observation or scientific problem written in a special way that leads to further investigation. ▪ You write hypotheses in the form of an “If…, then …, because…” statement. ▪ Hypothesis needs to include your independent and dependent variables

HOW TO WRITE A HYPOTHESIS ▪ If (independent variable)…. then (dependent variable)…. . because (inference) ▪Independent = The thing you CHANGE. ▪Dependent = The thing you MEASURE.

In your notebook, change the following hypotheses into IF/THEN/BECAUSE statements Think about it this way: If [I do this], then [this will happen] because…. Chocolate may cause pimples. Salt in soil may affect plant growth. Plant growth may be affected by the color of the light. 4. Bacterial growth may be affected by temperature. 5. Temperature may cause leaves to change color. 1. 2. 3.

IF…. THEN…BECAUSE ▪ Problem: At which grade do middle school students carry the heaviest backpacks? ▪ Hypothesis: If students are in higher grades, then their backpacks will be heavier, because they have bigger textbooks.

IF…. THEN…BECAUSE ▪ Problem: Will I do well on the science test? ▪ Write a Hypothesis statement

Write hypothesis…determine variables • How does studying with music affect student test scores? • Independent Variable: _____________________ • Dependant Variable: _____________________ • Constants: _____________________ • Hypothesis: If a student studies while listening to music, then their test scores will ___________ because ____________

Write hypothesis…determine variables • A dog owner wants to test how exercise affects how his dog sleeps. His hypothesis was If my dog has more hours of exercise, then the number of hours he sleeps will increase because he used more energy exercising. He was careful to give his dog the same amount of food on the days he did the experiment. Amount of Exercise Amount of Sleep 2 hours 4 hours 5 hours 6 hours

Lisa is working on a science project. Her task is to answer the question: "Does Rogooti (which is a commercial hair product) affect the speed of hair growth“? Using the IF/THEN/BECAUSE format, write a possible hypothesis for the above question.

HYPOTHESIS ▪ If……. then……. . because

IF…. THEN…BECAUSE ▪ Example: ▪ “If the scientist changes this one thing, then he will record this data because of this background research. ”

IF…. THEN…. BECAUSE ▪ Problem: At what temperature and how long do you bake chocolate chip cookies? ▪ Hypothesis: If I bake the cookies at 500 degrees for 15 minutes, then the cookies will burn, because cookies should bake 15 minutes at 425 degrees

WRITE A HYPOTHESIS: Problem: Do more students drink milk or carbonated beverages at lunch? • • • Independent Variable: _____________ Dependant Variable: _____________ Constants: _________________ Hypothesis: If ________________, then ____________________ because___________________.

Write hypothesis…determine variables • How does temperature affect a football players performance? • Independent Variable (I. V. ): _____________________ • Dependant Variable (D. V. ): _____________________ • Constants: _____________________ • Hypothesis: If ________________________________, • then _________________________________ • because ________________________________