1. Chemistry Unit 1 Jeopardy You Know I’m Precise I’m…ugh…DenseHow Do You Measure Up? You Call That Experimental? We All Undergo Changes 100 200 300 400 500

2. ONLY precise. Close together but not near the actual value. You measure a table three times and get 89.3cm, 89.5cm and 89.2cm. If the table’s length is actually 74.3cm your readings are…

3. 1,2 Describe why an object sinks or floats Sink – more dense than liquid. Float – less dense than liquid.

4. 1,3 Measure correctly What is 35.0 mL?

5. 1,4 Sally says that eating breakfast increases performance in school. What is the dependent variable? Performance in school/grades

6. 1,4 You get angry at a friend and throw their ipod out the window. It hits the ground and smashes into 20 pieces. What type of change is this? What is Physical?

7. 2,1 Your friend Julie is playing darts and throws these 4 darts. She is… Accurate & Precise

8. 2,2 What is the density of an object with a mass of 24g an a volume of 17ml? 1.41g/mL

9. 2,3 What is 220 mL?

10. 2,4 You believe that cell phone’s batteries will last longer if they are kept in a plastic bag when not in use. What would be your independent variable, dependent variable? IV: whether phone is in bag or not. DV: battery life

11. 1,4 You pour 2 clear liquids into a bag and a red solid forms. Type of change? What is a chemical change?

12. 3,1 Define Accuracy The act of being close to the actual value

13. 3,2 If an object has a density of 17.4g/mL and a volume of 19mL what is it’s mass? 331g

14. 3,3 What is 76.0 mL?

15. 3,4 Your principal claims that stress levels will increase due to higher amount of homework assigned. So this week he says half of classes should have half their normal homework assigned. What is your IV, DV and control group? IV: amount of homework assigned. DV: stress levels of students. Control group: students with normal amounts of homework.

16. 1,4 You walk into your kitchen and see bubbles coming from a pot as water is boiled to make pasta. Type of change? What is physical? Same substance

17. 4,1 Can you be precise without being accurate? Explain Yes. You can be consistent and off from the actual answer or value.

18. 4,2 Object has density of 0.65g/mL and a mass of 14g what is it’s volume? 21.54 mL

19. 4,3 What is 13.81mL?

20. 4,4 Your mother wants to see if hummingbirds like a certain color feeder best. So she puts 3 feeders in backyard by each other. 1 blue, 1 red and 1 green. What is her IV, DV, and constants? IV: color of feeder, DV: number of birds that show up, constants: all in her backyard.

21. 1,4 You grill a hamburger!!!! Type of change? What is Chemical?

22. 5,1 Daily Random! – What letter is not on the periodic table of elements? J

23. 5,2 If you have 3000g of lead how much space would it take up? 265.49mL

24. 5,3 What is 21.31mL?

25. 5,4 RANDOM: Which of the following is the biggest? a.An elephant b.The moon c.The sun d.The earth The sun.

26. 2,4 You go camping and start a fire and roast Marshmallows for s’mores. You then hang an ice block over the fire to melt and put out the fire. What are the chemical changes that occurred? What is Starting the fire & cooking marshmallows?