Lesson 68 * 9th Grade Photocopy: Classroom set of Directions for Drop of Water Cartoon.

Mr. Petersen Bonneville Junior High Lesson 68 9th Grade Mr. Petersen Bonneville Junior High

Announcements Tomorrow (January 8th) students will need to be able to answer Constructive Response Questions 3 and 4 from memory. Acuity Test will be January 15th. Portfolio 3 will be due January 16th. Self Starter Sheet will be due this Thursday (January 9th * Lesson 70) Natural Disaster Essay Reports are due today.

Essential Question: Describe the water cycle. Self Starter Sheet 40 Points Possible Today’s Learning Objective and Questions Learning Objective: Students will characterize the water cycle in terms of its reservoirs. Essential Question: Describe the water cycle. Answer: Write your own answer.

9th Grade *Glossary List [ 1] Ocean Ridge- Rock Slide- Hurricane- Elastic Rebound Hypothesis- Geosphere- Water Cycle- Plate Tectonics-

Constructive Response Test * 20 Points Directions: Take out a sheet of lined paper. Find out what your roll number is. Answer the following 2 questions: Explain how temperature and density drive convection currents and draw a model of molecules showing cold, warm and hot. What role does gravity play in plate movement?

Directions Correct and record scores while showing the following video. Turn in your “Natural Disaster Essay” for Points as well.

Discovery Channel * Natural Disaster * 16:40 from the Sun * 16 Minutes.

Constructive Response Questions Review Describe and evaluate the evidence for plate tectonics that you find the most important.

Answer Answers will vary Discussion: The current theory of plate tectonics is supported by sea floor ridges where magma rising from inside Earth seems to push plates apart or be responding to the pulling apart of plates at other plate boundaries. Matching magnetic striping of rocks formed at ridges indicates new land formed at regular intervals along ridges. Dates of sea floor samples shows oldest rocks furthest from ridges.

Constructive Response Question [ 3] Scientific history has many examples of important work being ignored by mainstream scientists. Why is it important that scientists be skeptical? It is important to be skeptical because a single experiment or data set may not be representative of the whole. Scientists must demand a body of evidence before they can call a hypothesis a theory.

Answers * K E Y For Constructive Response Test Temperature and density are related to one another. As a substance heats, it becomes less dense allowing it to rise if it is in a more dense substance. As it cools the density increases and it may sink. Gravity allows for density differences to move plates. Molten magma can rise, cold solid basalt will sink. The plates move as a unit and are pushed and pulled by gravity resulting in movement.

Answer 1 * K E Y Hot Warm Cold

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