The Scientific Method The Scientific Method Scientific Method
- Slides: 28
The Scientific Method
The Scientific Method
Scientific Method • Scientific method is a body of techniques for investigating events, acquiring new knowledge, or correcting and incorporating previous knowledge • The scientific method is used to analyze events in an unbiased way.
Components of the Scientific Method 1. Question 2. Hypothesis 3. Experiment 4. Conclusion Scientific Method Monty Python. flv
1. Question • The Question Refers to a specific observation – “Why is the sky blue” – In the movie, the question was “is she a witch? ”
2. Hypothesis • A hypothesis is an IF. . THEN. . statement. • A hypothesis is NOT an educated guess • In the movie the Hypothesis was “IFthe girl is a witch THEN she will weigh the same as a duck.
3. Experiment • A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
4. Conclusion • If the experimental data validates the hypothesis consistently, then the hypothesis becomes a THEORY.
Scientific Law vs. Theory
What is a Theory?
What is a Law?
THEORIES NEVER BECOME LAWS!
Accuracy vs. Precision • Q: Because the woman in the film weighed as much as a duck, does that make her a witch? • NO, just because a hypothesis is true once does not make it accurate. A hypothesis must be tested over and over again and give precise results before it is accurate.
Accuracy vs. Precision • Q: If we weighed the woman again on the same scales would we have the same result? • Q: If we get the same results, isn’t theory of the woman being a witch TRUE? • NO, hypothesis must be tested in many different places with different reliable pieces of equipment.
Accuracy vs. Precision Q 1: If we weighed the woman again on the same scales would we have the same result? Is the test the villagers used accurate? Precise? Q 2: If we get the same results, isn’t theory of the woman being a witch TRUE? Use your definitions of Accuracy and Precision to answer this question! • Accuracy and Precision. flv
Accuracy vs. Precision
Accuracy vs. Precision
Variables (things that change)
Variables (things that change)
Variables (things that change)
Independent Variable (IV) vs. Dependent variables (DV) • Independent Variable: Variable that is manipulated. – ALWAYS ON THE X AXIS (bottom axis) • Dependent Variable: Variable that changes as a result of the independent variable. – The thing that’s measured – ALWAYS ON THE Y AXIS (side axis)
For example… 3 M HCl with shell 2 M HCl with 1 M HCl with shell Water with shell
Types of variables • Independent variable (IV)– What we change on purpose (Eg. how acidic the water is) • Dependent variable (DV) – What we measure as the result (Eg. How much shells have dissolved after 3 days) • Controlled variables (constants) – What we keep the same to keep the experiment fair (Eg. The amount of acids and water; the type of shell; the temperature of the environment) • In most experiments there is ONE independent variable, ONE dependent variable and many controlled variables
Remember… • Cows Moo Softly – Change one thing- Independent – Measure one thing- Dependent – Keep everything else the same. Constants
Controlled variables vs control 3 M HCl with shell 2 M HCl with 1 M HCl with shell Water with shell • Independent variable - concentration of acid • Dependent variable – how much each shell dissolves • Controlled variables (constants) – time of experiment, amount of acid and water, type of shell • Control – the water with shell, what we compare to
- Scientific inquiry vs scientific method
- Hát kết hợp bộ gõ cơ thể
- Lp html
- Bổ thể
- Tỉ lệ cơ thể trẻ em
- Chó sói
- Glasgow thang điểm
- Chúa sống lại
- Môn thể thao bắt đầu bằng từ đua
- Thế nào là hệ số cao nhất
- Các châu lục và đại dương trên thế giới
- Công thức tính thế năng
- Trời xanh đây là của chúng ta thể thơ
- Mật thư tọa độ 5x5
- Làm thế nào để 102-1=99
- độ dài liên kết
- Các châu lục và đại dương trên thế giới
- Thơ thất ngôn tứ tuyệt đường luật
- Quá trình desamine hóa có thể tạo ra
- Một số thể thơ truyền thống
- Cái miệng nó xinh thế chỉ nói điều hay thôi
- Vẽ hình chiếu vuông góc của vật thể sau
- Thế nào là sự mỏi cơ
- đặc điểm cơ thể của người tối cổ
- V cc cc
- Vẽ hình chiếu đứng bằng cạnh của vật thể
- Fecboak
- Thẻ vin
- đại từ thay thế