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Applying the Scientific Method

Applying the Scientific Method. What’s the best way to find out about something?. ASK A QUESTION!!!!!!. HYPOTHESIS. A statement that makes a CLAIM about how 2 things are related. Chocolate may cause pimples. Salt in soil may affect plant growth.

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Applying the Scientific Method

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  1. Applying the Scientific Method

  2. What’s the best way to find out about something? • ASK A QUESTION!!!!!!

  3. HYPOTHESIS • A statement that makes a CLAIM about how 2 things are related. • Chocolate may cause pimples. • Salt in soil may affect plant growth. • Plant growth may be affected by the color of the light. • Bacterial growth may be affected by temperature. • Ultra violet light may cause skin cancer. • Temperature may cause leaves to change color.

  4. HYPOTHESIS • The 2 things are VARIABLES. • A change in one VARIABLE causes a change in the other VARIABLE.

  5. HYPOTHESIS • The variable causing the change is the INDEPENDENT VARIABLE (I.V.) or MANIPULATED VARIABLE. • The variable being changed is the DEPENDENT VARIABLE (D.V.) or RESPONDING VARIABLE. • “Exploding cars may cause injury”.

  6. HYPOTHESIS • LOOK AGAIN AT THE PREVIOUS SENTENCES AND IDENTIFY THE I.V. AND THE D.V. • Chocolate may cause pimples. • Salt in soil may affect plant growth. • Plant growth may be affected by the color of the light. • Bacterial growth may be affected by temperature. • Ultra violet light may cause skin cancer. • Temperature may cause leaves to change color.

  7. HYPOTHESIS • A statement that makes a CLAIM about how 2 things are related. • Chocolate may cause pimples. • Salt in soil may affect plant growth. • Plant growth may be affected by the color of light.

  8. HYPOTHESIS • A statement that makes a CLAIM about how 2 things are related. • Bacterial growth may be affected by temperature. • Ultra violet light may cause skin cancer. • Temperature may cause leaves to change color.

  9. HYPOTHESIS • How do we know that it is the • Chocolate is causing the pimples? • Temperature is causing the bacterial growth? • CONTROL • Run the ENTIRE experiment WITHOUTthe INDEPENDENT VARIABLE • See if pimples occur with NO CHOCOLATE • See if bacteria grow the same amount in ANY TEMPERATURE

  10. EXPERIMENT • A way to test an hypothesis. • Provides PROOF that an hypothesis is TRUE or FALSE.

  11. EXPERIMENT • The hypothesis determines the SET-UP • Materials and • Procedures

  12. METHODS OF SCIENCE • BUT FIRST!!!!! • Let’s talk about FACTS, LAWS & THEORIES

  13. SCIENTIFIC FACT • An agreement made by qualified scientists about many observations of the same thing. • FOR EXAMPLE: “There are 9planets in our solar system”. • Facts or definitions may change. • They’re human created.

  14. SCIENTIFIC LAW • A relationship that ALWAYS holds TRUE. • For example: • Gravity • The earth rotating around the sun

  15. SCIENTIFIC THEORY • A way of relating observations, laws, and facts. • An explanation (hypothesis) of how or why something happens which is TESTED again and again. • Basically, a well-tested hypothesis. • It CAN change.

  16. MODELS OF SCIENCE • A way to represent something that cannot be seen easily or directly. • MAPS • ATOMS • OTHER MENTAL MODELS

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