Discovery Science Center Author(s): Dean Papadakis Field Trip - Teacher's Guide SED 695B http://www.discoverycube.org/ Replica Model of the Space Shuttle Endeavor 1: Start out going EAST on NORDHOFF ST toward LINDLEY AVE. 3.0 miles Map 2: Merge onto I-405 S. 4.9 miles Map 3: Merge onto US-101 S toward LOS ANGELES. 19.9 miles Map Endeavor’s Rocket Engines for Changing Direction 4: US-101 S becomes I-5 S. 25.7 miles Map 5: Merge onto CA-22 E via EXIT 107A toward ORANGE. 1.1 miles Map 6: Take EXIT 15 toward MAIN ST. 0.2 miles Map 7: Turn RIGHT onto W TOWN AND COUNTRY RD. 0.2 miles Map 8: Turn LEFT onto N MAIN ST / S MAIN ST. Continue to follow N MAIN ST. 0.4 miles Map 9: End at Discovery Science Ctr: 2500 N Main St, Santa Ana, CA 92705, US Map Total Est. Time: 1 hour, 3 minutes Est. Distance: 55.86 miles Total The Solar Cell Cube Topics addressed: The topics addressed by the exhibits at the Discovery Science Center include: Light and Waves Angular Momentum Electricity and electrical energy Operation of Solar Cells Air Pressure Planetary Science Pressure and Forces Description of Field Trip This field trip is designed for students to take either with their teacher or on their own. The students will go to the museum and investigate all of the exhibits, which can be done in two to three hours. During the visit, students will have with them their study guide sheet, which asks questions from most of the exhibits. After observing and interacting with the exhibit, they will answer the questions provided on the study guide. In some cases, the answers to the questions from the study guide at the exhibit will be seen Standards Addressed by the Exhibits California State PHYSICS Standards Grades 9-12 Motion and Forces or described. Otherwise, the answers can be taken with them in a sealed envelope, which can be opened at the conclusion of the trip. Alternatively, the questions in the study guide are designed so that they can be answered before going to the museum and then as they interact with the exhibits, they can check the answers they have already selected. 1. Newton’s laws predict the motion of most objects. As a basis for understanding this concept, Additionally, after going to the students know: museum, students can be given the When forces are balanced no assignment of working in groups of acceleration occurs, and thus an two to three to duplicate the exhibits object continues to move at a from the museum in the classroom, by constant speed or stays at rest using the equipment and supplies that (Newton's First Law) are available at school. This could be done in preparation for Open House Circular motion requires application of a in the Spring, so that other students constant force directed toward the center of the and even the younger brothers and circle. sisters of the students can have the opportunity to examine the science Conservation of Energy and principles demonstrated by the exhibits. Momentum 2. The laws of conservation of energy and momentum provide a way to predict and describe the movement of objects. As a basis for understanding this concept, students know: How to solve problems involving elastic and inelastic collisions in one dimension using the principles of conservation of momentum and energy Waves 4. Waves have characteristic properties that do not depend on the type of wave. As a basis for understanding this concept, students know: Waves carry energy from one place to another How to identify transverse and longitudinal waves in mechanical media such as springs, ropes, and the Earth (seismic waves) Sound is a longitudinal wave whose speed depends on the properties of the medium in which it propagates. Study Guide: Discovery Science Center in Santa Ana Student Assignment As you walk through the various exhibits, answer the following questions: “Vortex” Which direction does your bathtub water drain? a) Counter Clockwise b) Clockwise “Earthquake Waves and Buildings” Look at the four different sized buildings. If a low frequency earthquake wave passed underneath the building, in which type of building would it be safer? a) 2- story building b) 5-story building c) 7-story building “Electrical Power Consumption” Place the following 6 electrical devices in order from highest consumption to lowest consumption by matching them with their correct Electrical Power Consumption (in Watts). (1) Stereo ____ (2) Swimming Pool Filter ____ (3) Refrigerator ____ (4) Television ____ (5) Incandescent Light Bulb ____ (6) DVD Player ____ (a) 60 W (b) 725 W (c) 25 W (d) 900 W (e) 70 W “Bernoulli’s Bench” According to Bernoulli’s Principle, what happens when compressed air is blown between the two hanging bowling balls? (f) 150 W a) They move closer together b) They move farther apart “Bernoulli’s Blower” In relationship to the beach ball, where is the fastest moving air? a) above the ball b) below the ball c) along the sides of the ball “The Science of the Planet Mars” How much time does it take a radio signal from Mars to travel to Earth, when Mars is at its closest position to Earth? (What is the light-distance from Earth to Mars?) a) 4 minutes b) 20 minutes c) 45 minutes 1 Day on Mars is equivalent to how much time on Earth? a) 10 hours b) 24 hours c) 13 minutes 1 Year on Mars is equivalent to how much time on Earth? a) 3 months b) 2 years c) 12 years “Strobe String” What are three variables you can adjust in this exhibit? 1. _____________________________________ 2. _____________________________________ 3. _____________________________________ “Strobe Fan” Explain what you need to do in order to see the propeller picture appear to stand still? ____________________________________________________________________ Explain what you need to do in order to make the propeller appear to spin clockwise? ____________________________________________________________________ Explain what you need to do in order to make the propeller appear to spin counterclockwise? ____________________________________________________________________ Click Here to See Strobe Movie How Does a Solar Cell Work? (Like the one in the Cube) ________________________________________________ ________________________________________________ Bead of Nails What principle allows Mr. Papadakis to lay on a bed of nails? _____________________________________________________________________ Answers to Questions: Vortex a) Counterclockwise Earthquake Waves and Buildings a) 2- story building Electrical Power Consumption (1) Stereo (2) Swimming Pool Filter (3) Refrigerator (4) Television (5) Incandescent Light Bulb (6) DVD Player 70 Watts 900 Watts 725 Watts 150 Watts 60 Watts 25 Watts Highest Lowest Bernoulli’s Bench a) They move closer together Bernoulli’s Blower a) above the ball The Science of the Planet Mars a) 4 minutes b) 24 hours b) 2 years Strobe String Tension in string Rotational speed of motor attached to string Blinking rate of Strobe Light Strobe Fan Match the strobe frequency with the frequency of the rotating fan blade Reduce the strobe frequency Increase the strobe frequency How Does a Solar Cell Work? Bed of Nails The principle of pressure explains how this works. Because the weight of the person is spread out over a large area the force created by any one nail is not very much and therefore the pressure created by the nails is also small. Start removing the nails one by one and the force and pressure will gradually increase. Pressure = Force/Area or Pressure = Force/ Area References & Links: Discovery Science Museum: http://www.discoverycube.org/ Image of the Planet Mars: http://www.hoax-slayer.com/images/mars.jpg California State Science Standards: http://www.cde.ca.gov/be/st/ss/scmain.asp