2. I Can explain how chemical change is evidenced DO NOW: Quick Write: explain the evidences of chemical change we see occurring in the following pictures:

3. I Can brainstorm Jeopardy answers DO NOW: Quick Write What is the evidence of chemical change happening in this picture?

4. Adapted by T. Trimpe http://sciencespot.net/http://sciencespot.net/

5. Game Rules and Procedures Each table is 1 team. No changing tables or teams! Each team gets 1 dry erase board, 1 marker and 1 eraser. One person is in charge of writing down answers. Write your team’s number at the top of your dry erase board. NEVER erase it.

6. Scoring System Correct Answer: 1 point Incorrect Answer: no point Arguing with team: lose a point Talking during game: lose a point (don’t accidentally give away your answers!!) Being disruptive: lose a point

7. Don’t Forget... Contestants

8. Although they give answers in the form of questions on the TV show, you do not need to do this. You do need to write your answers on your team’s game board! The winning team gets PANTHER TICKETS!!

9. Density and Physical/Chemical Changes What is the density of a substance with a mass of 20 and a volume of 10?

10. Density and Physical/Chemical Changes What is the density of a substance with a mass of 20 and a volume of 10? ANSWER: 2 (density equals mass/volume)

11. DENSITY Which is the right calculation for determining the density of an object with a mass of 80 grams and a volume of 40 milliliters? A. 40 ÷ 80 B. 40 ‒ 80 C. 80 ÷ 40 D. 80 ‒ 40

12. DENSITY Which is the right calculation for determining the density of an object with a mass of 80 grams and a volume of 40 milliliters? ANSWER: C A. 40 ÷ 80 B. 40 ‒ 80 C. 80 ÷ 40 D. 80 ‒ 40

13. DENSITY A rock with a mass of 54 grams is dropped into a graduated cylinder holding 7 mL of water. If the rock makes the water level rise to 13 mL, what is the VOLUME of the rock?

14. DENSITY A rock with a mass of 54 grams is dropped into a graduated cylinder holding 7 mL of water. If the rock makes the water level rise to 13 mL, what is the VOLUME of the rock? ANSWER: 6 mL (find using displacement)

15. DENSITY A rock with a mass of 54 grams is dropped into a graduated cylinder holding 7 mL of water. If the rock makes the water level rise to 13 mL, what is the DENSITY of the rock?

16. DENSITY A rock with a mass of 54 grams is dropped into a graduated cylinder holding 7 mL of water. If the rock makes the water level rise to 13 mL, what is the DENSITY of the rock? ANSWER: 9 g/mL (54 divided by a volume of 6 equals 9)

17. Density and Physical/Chemical Changes What is the volume of this cube? 2cm

18. Density and Physical/Chemical Changes Answer:2 x 2 x 2 =8 cm³ (length x width x height) 2cm

19. Density and Physical/Chemical Changes What is the volume shown in the graduated cylinder?

20. Density and Physical/Chemical Changes ANSWER: 24 mL

21. Density and Physical/Chemical Changes What is the mass shown on the triple beam balance?

22. Density and Physical/Chemical Changes ANSWER: 17 grams

23. Density and Physical/Chemical Changes Lamp oil floats on top while honey sinks to the bottom. Which liquid is the least dense?

24. Density and Physical/Chemical Changes ANSWER: Lamp Oil (low density floats)

25. Density and Physical/Chemical Changes All of these cubes have equal volume but different masses. Which cube has the greatest density? Cube A Cube CCube B

26. Density and Physical/Chemical Changes ANSWER: Cube A Cube A Cube CCube B

27. The table shows four different sample materials, one of which is sponge, a type of material which floats on water (water has a density of 1.00 g/cm³). SAMPLEMASSVOLUME 175 g300 cm³ 2100 g25 cm³ 3300 g58 cm³ 4150 g90 cm³ Which sample is most likely sponge?

28. The table shows four different sample materials, one of which is sponge, a type of material which floats on water (water has a density of 1.00 g/cm³). SAMPLEMASSVOLUME 175 g300 cm³ 2100 g25 cm³ 3300 g58 cm³ 4150 g90 cm³ Which sample is most likely sponge? ANSWER: SAMPLE 1 (the only one with a density of less than 1)

29. Density and Physical/Chemical Changes ANSWER: 24 mL OBJECTMASS (g)Volume (cm³)Density (g/cm³) A4004010 B150275 C50252 D10005020 A student finds an object with a mass of 90 grams and a volume of 45 cm³. Which object in the table above has the same density as the object the student found?

30. Density and Physical/Chemical Changes ANSWER: 24 mL OBJECTMASS (g)Volume (cm³)Density (g/cm³) A4004010 B150275 C50252 D10005020 A student finds an object with a mass of 90 grams and a volume of 45 cm³. ANSWER: OBJECT C (both densities are 2)

31. CHEMICAL CHANGES Which of the following is NOT evidence of a chemical change? A. production of light B. production of gas C. decrease in size D. change in temperature

32. CHEMICAL CHANGES Which of the following is NOT evidence of a chemical change? ANSWER: C A. production of light B. production of gas C. decrease in size D. change in temperature

33. CHEMICAL CHANGES Which of the following IS an example of a chemical change? A. steam from hot water B. iron rusting C. snow melting D. oil floating on water

34. CHEMICAL CHANGES Which of the following IS an example of a chemical change? ANSWER: B A. steam from hot water B. iron rusting C. snow melting D. oil floating on water

35. CHEMICAL CHANGES A teacher adds some clear, liquid lead nitrate to a beaker filled with clear, liquid potassium iodide. A yellow solid forms and sinks to the bottom. What two evidences of a chemical change have occurred?

36. CHEMICAL CHANGES A teacher adds some clear, liquid lead nitrate to a beaker filled with clear, liquid potassium iodide. A yellow solid forms and sinks to the bottom. What two evidences of a chemical change have occurred?ANSWER: color change and formation of a precipitate

37. CHEMICAL CHANGES Paul leaves an orange on the window sill for three days. When he finds it again, he cuts it open and sees the inside is brown and has a weird smell. Which of the following indicates a chemical change in the orange? A. Cutting it open B. Removing it from the window C. The color and smell change

38. CHEMICAL CHANGES Paul leaves an orange on the window sill for three days. When he finds it again, he cuts it open and sees the inside is brown and has a weird smell. Which of the following indicates a chemical change in the orange? ANSWER: C A. Cutting it open B. Removing it from the window C. The color and smell change

39. How many points do you want to risk?

40. Name 5 different evidences of a chemical change

41. ANSWER: Formation of a precipitate Production of a gas Production of light Temperature change Color change A new smell is produced

42. And the winner is …