1. Science February 23-27, 2015

2. Monday, February 23

3. Science Starters ● Worth 50 points per week ●If you are absent, you need to go onto my staff webpage and find the file to makeup ●In the daily box, write the “claim” for each video and the answer for each puzzle challenge

4. Science Starter Monday Write the claim that Marques Brownlee is making about the headphones in this video.

5. Monday- Classroom Assignment Inquiry packet p. 46-51 due by next Monday, March 2 nd.

6. Tuesday, February 24

7. Science Starter Tuesday, Feb. 24 Created by T.Trimpe 2008 http://sciencespot.net/

8. Give the symbol for each element listed below. Use your resources to help you! 1.Hydrogen 2.Sulfur 3.Fluorine 4.Helium 5.Silicon 6.Boron 7.Carbon 8.Nitrogen 9.Sodium 10.Calcium

9. Tuesday- Classroom Assignment Power Notes written on pg. 70-71 of lab book. See the following slides for notes.

10. Unit 1 Lesson 1 Motion and Speed Copyright © Houghton Mifflin Harcourt Publishing Company

11. Location, location, location Copyright © Houghton Mifflin Harcourt Publishing Company How can you describe the location of an object? Position describes the location of an object. Comparisons using known objects or locations often are used to describe position. A reference point is a location to which you compare other locations. Unit 1 Lesson 1 Motion and Speed

12. How can you describe the location of an object? Describe the positions of the different parts of the zoo. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 1 Motion and Speed

13. MOVE It! Copyright © Houghton Mifflin Harcourt Publishing Company What is motion? Motion is a change in position over time. Even when motion is not observed directly, starting points and end points can indicate motion has occurred. Unit 1 Lesson 1 Motion and Speed

14. How is distance measured? Distance can be measured as a straight line between two positions. Distance can also be measured as the total length of a certain path between two positions. The standard unit of length for distance is the meter (m). Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 1 Motion and Speed

15. How is distance measured? Which distance is greater: a straight line from A to B or the total length of the path below? Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 1 Motion and Speed

16. What is speed? Speed is a measure of how far something moves in a given amount of time. Speed measures how quickly or slowly an object changes its position. Fast objects move farther than slower objects in the same amount of time. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 1 Motion and Speed

17. What is average speed? Average speed is a way to calculate the speed of an object that may not always be moving at a constant speed. Average speed describes the speed over a stretch of time rather than at any exact moment in time. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 1 Motion and Speed

18. Speed It Up! Copyright © Houghton Mifflin Harcourt Publishing Company How is average speed calculated? Speed can be calculated by dividing the distance an object travels by the time it takes to cover that distance. speed = distance/time s = d/t Unit 1 Lesson 1 Motion and Speed

19. Copyright © Houghton Mifflin Harcourt Publishing Company How is average speed calculated? If two objects travel the same distance, the object that takes less time has the greater speed. An object with a greater speed travels farther in the same time than an object with a lower speed travels. The standard unit for speed is meters per second (m/s). Unit 1 Lesson 1 Motion and Speed

20. Fast Graphs Copyright © Houghton Mifflin Harcourt Publishing Company How is constant speed graphed? Distance-time graphs are used to plot the distance an object travels over time. The distance of an object away from a reference point is plotted on the y-axis. Time is plotted on the x-axis. Objects moving at a constant speed make a straight line on the graph. Unit 1 Lesson 1 Motion and Speed

21. How is constant speed graphed? The slope, or steepness, of the line is equal to the average speed of the object. Average speed can be calculated by dividing the change in distance by the change in time for that time interval. slope = change in y/change in x Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 1 Motion and Speed

22. How are changing speeds graphed? On a distance-line graph, a change in the slope of a line indicates a change in speed. If the line gets steeper, the object’s speed has increased. If the line gets less steep, the object has slowed down. A flat line indicates zero speed. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 1 Motion and Speed

23. Follow Directions Copyright © Houghton Mifflin Harcourt Publishing Company What is velocity? A vector is a quantity that has both size and direction. Velocity is speed in a specific direction. Objects can have the same speed but different velocities because of their direction of travel. Unit 1 Lesson 1 Motion and Speed

24. What is velocity? Average velocity depends on the distance from the starting point to the final point. Average velocity can be 0 km/h if you travel at a certain speed to one point and then travel back to the starting point. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 1 Motion and Speed

25. Wednesday, February 25

26. Density #1 Wednesday, Feb 25 R. Bryant 2008 WSMS – Based on “Science Starters” by T. Trimpe at http://sciencespot.net

27. Find the density of the box below. 12.5 cm 5.6 cm Mass 456 g

28. Classwork: Lab: Distance-Time Graph If absent, use the following scenario to create a distance-time graph on a piece of graph paper. A mother goes on a walk with her young child. They leave the house and walk 25 meters (m) in 2 min until the child is distracted by a flower and they stop for 1 min. They resume walking for 3 min and cover another 25 m in this time. Then, they start running. They run 50 m in 1 min. They stop at the neighborhood playground for 10 min before they start walking back home. They walk 50 m in 4 min, then stop for 3 min because the child falls down. They then walk quickly back home, covering 50 m in 2 min, stopping only once they have reached their house. Create a distance-time graph to show the speed of the mother and child. Hint: Create a chart first of all the times and distances before graphing.

29. Thursday, February 26

30. Thursday Science Starter Write the claim the Marques Brownlee says about Beats by Dre

31. Today’s Assignment: Bill Nye video “Time” Bill Nye video on “Time”. If absent, view video online and take notes on information from video on. Pg. 73 of your lab book.

32. Friday, February 27

33. Science Starter Friday Write the claim about why vaccines work from the video.

34. Friday’s Assignment Complete the sheet “Journey to the Bus Stop”. This should be done by yourself and will only be graded so that I can see where your current level of knowledge is. Turn in to the “inbox” when done. If absent, you will need to get this worksheet from me to complete.