Measuring Motion Gizmo Answer Key

Name: Addison Cuevas Date: 08-12-2022 Student Exploration: Measuring Motion Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: distance, speed Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The speed of an animal is how fast it is moving. A speed of 6 m/s (meters per second) means that the animal moves a distance of 6 meters every second. 1. How would you measure the speed of an animal? Simply dividing the distance traveled by the time it took the animal to move. 2. What do you think are the fastest animals? I believe that a peregrine falcon is the quickest animal. Gizmo Warm-up You have been sent on an African safari by International Geography magazine. Your assignment is to find the fastest land animals in the world. Your only tool is a video camera. The safari is shown in the Measuring Motion Gizmo. 1. On the SAFARI ADVENTURE tab, wait for an animal to pass by. Press the record button ( ). Press stop ( ) when the animal has passed by. A. Which animal did you record? A lion B. Was the animal walking or running? It was on foot. 2. Select the PLAYBACK tab. Practice using some of the different buttons on this tab: ● Use the Play ( ● Click Rewind ( ● Click Advance frame ( ● Click Tools at upper left, and drag some arrows ( the animals at different times. Use the Time slider to go to a specific time. ● ) button to replay the simulation. ) to go back to the beginning. ) to move forward exactly one second at a time. ) onto the recording to mark the positions of Get the Gizmo ready: Activity A: ● Select the SAFARI ADVENTURE tab. ● Remove all arrows from the screen. ● A calculator is recommended for this activity. Estimating speed Question: How do you measure speed? 1. Run Gizmo: Record an animal running. Then switch to the PLAYBACK tab and watch your recording. Which animal did you record? I recorded a rhino 2. Measure: Click Rewind ( ). Use Advance frame ( ) to advance the recording one second. Mark the animal’s position with an arrow ( ) and repeat. Estimate the distance the animal traveled in one second. (Note: The trees in the background are 5 meters apart.) A. About how far did the animal travel in 1 second? It moved at a pace of about five meters per second. B. How did you make your estimate? I observed that the rhino arrived at the following tree after 5 seconds and realized there were 5 meters between the trees. 3. Calculate: The distance an animal travels each second is its speed. What is the estimated speed of this animal? 5 m/s (Units are meters per second, or m/s.) 4. Measure: You can get a more accurate estimate of distance and time using these steps: ● Use the Time slider to position the animal so that its nose is even with the first tree. Record the current time in the table below as Time 1. ● Position the animal so that its nose is even with the last tree and record Time 2. ● Subtract the first time from the second to get the Time difference. ● Record the Distance from the first tree to the last. (The trees are 5 meters apart.) Time 1 Time 2 Time difference (s) Distance (m) .9 5.7 4.8 25m 5. Calculate: The speed of the animal is equal to the distance divided by the time difference. A. What is the estimated speed of the animal now? 5.21 m/s B. Is this value close to the speed you calculated before? Yes Get the Gizmo ready: Activity B: Who’s fastest? ● Select the SAFARI ADVENTURE tab. ● Remove all arrows from the screen. ● A calculator is recommended for this activity. Question: Which animal is the fastest? 1. Form hypothesis: Watch the SAFARI ADVENTURE tab for a while. Based on your observations, which animals run the fastest? The cheetah will be the quickest animal if we compare how quickly every other living thing moves. 2. Measure: For each animal, measure distance traveled and time using any method you wish. Divide distance by time to calculate speed. Measure running animals only. Animal/object Distance (m) Time (s) Speed (m/s) Cheetah 5 .2 25 m/s Eagle 10 .6 16.67 m/s Elephant 10 1.8 5.56 m/s Gazelle 10 .8 12.5 m/s Giraffe 15 1.2 12.5 m/s Jeep 10 .5 20/s Lion 15 1 15m/s Person 10 8 12.5 m/s Rhino 20 2.7 7.41 m/s Warthog 5 .7 7.14 m/s Zebra 10 .6 16.67 m/s 3. Analyze: What is the fastest animal/object? The swiftest animal is a cheetah. Slowest? The slowest animal is an elephant. 4. Convert: There are 1,000 meters in a kilometer, and 3,600 seconds in an hour. You can convert units of meters per second (m/s) into kilometers per hour (km/h) by multiplying by 3,600 and dividing by 1,000. (Hint: That is the same thing as multiplying by 3.6.) A. What is the speed of a cheetah in kilometers per hour? Cheetah travels at 90 km/h. B. What is the speed of a person in kilometers per hour? A person would move at 45 km/h.