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Investigate buoyancy Use inductive and deductive reasoning.

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Presentation on theme: "Investigate buoyancy Use inductive and deductive reasoning."— Presentation transcript:

1 Investigate buoyancy Use inductive and deductive reasoning

2 1. Background Information:  shows/mythbusters/videos/lets-talk- buoyancy.htm shows/mythbusters/videos/lets-talk- buoyancy.htm

3  2. Predict whether a piece of clay will float in water. ◦ Record your prediction on your paper

4  3. Fill your measuring cup with 400 ml of water.  Shape your piece of clay into a wide cup and place the cup-shaped piece of clay in the water.  Record your observations on the back of your lab paper.

5  4. Remove the clay from the water, dry it with a paper towel, and then tightly roll it into a small ball.  Place the ball of clay in the water.  Record your observations on the back.

6  5. Pour the water out of your measuring cup.  Dry off the measuring cup and clay and place them back on the paper towel on your table.  Wash your hands with warm water and soap when you are finished with this activity.

7  Think it over: ◦ 1. What effect did rolling the clay into a ball have on its ability to float? Explain using complete sentences.

8  Think it over: ◦ 2. Use what you learned in this activity to explain why a steel anchor sinks but a steel ship floats.

9  Think it over: ◦ Did you use deductive or inductive reasoning to answer Question 2? Explain. ◦ What is deductive and inductive reasoning?  Direction: Inductive reasoning moves from the specific to the general. Deductive reasoning moves from the general to the specific.

10  Deductive Reasoning: Deductive reasoning is based on laws or general principles. People using deductive reasoning apply a general principle to a specific example.  All oranges are fruits. All fruits grow on trees. Therefore, all oranges grow on trees.  Dinner is always at 6 pm. It is 6 pm. ______________________  Triangles have 3 sides. This shape has 3 sides. ________________________

11  Inductive Reasoning: Inductive reasoning is based on observation. People using inductive reasoning find a pattern in a collection of specific observations and draw a general conclusion based on that pattern.  All the tigers observed in a particular region have yellow black stripes, therefore all the tigers native to this region have yellow stripes.  Kim, Ralene, Jim, and Rick finished first, second, third, and fourth in a motor bike race. If their numbers were 5, 17, 1, and 7 use the following clues to find out who had what number and in what order they finished.  17 said she would have placed higher if her bike would not have stalled at the start.  Rick finished before 7 but after Ralene.  Jim wasn’t third.  1’s father said he was very proud of her finish.  Kim finished after 5.

12  Which statements are deductive and which statements are inductive?  1. Turtles have shells. They must use shells for protection. _______  2. A puddle has frozen. It must be below 0 degrees outside. _______  3. Because of gravity, everything that goes up must come down. _______  4. Many birds fly toward the equator in fall. Birds prefer warm weather. _______

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