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Across 4. SI unit of temperature 5. how many significant digits in the quantity "1127 students in the HS" 6. memory tool (ex: "King Hector Died By Drinking Chocolate Milk") 9. closeness a measurement is to the accepted ('true') value 10. collection of related measurements (ex: SI or English _?_) 18. describes a property that does depend on sample size (ex: mass) 19. all the #'s in a measurement known with certain plus a final estimated digit 21. device used to measure metal block dimensions to nearest 0.01 cm 22. SI prefix meaning "1/1000" 24. describes a numeric measurement 25. most dense (13.6 g/mL) liquid element at room temperature 28. liquid volume equal to one cubic decimeter 29. a measurement should always include both a # and a(n) _?_ 30. quantity that measures (counts) numbers of chemical particles

Down 1. curved surface of a liquid 2. SI is based on properties of the Earth and _?_ 3. SI prefix meaning "1000" 5. very large or small #'s should be written in scientific _?_ 6. density = mass ÷ volume; which of these is unaffected by temperature changes? 7. describes a property independent of sample size (ex: density, MP) 8. describes the consistency (or 'exactness') of a repeated measurement 11. mass per unit volume 12. density of substance ÷ density of water; unitless scale; specific _?_ 13. length, mass, temperature, time; the fundamental or _?_ quantities 14. used to measure the volume of an irregular (insoluble) solid 15. describes a measurement (ex: shape) that is nonnumeric 16. the last digit in a measurement is (usually) _?_ 17. SI unit of length 20. average density determines if a substance will sink or _?_ in water 23. how many significant digits in the measurement "0.01010 grams" 26. first letter of these if by increasing density: iron, water, mercury, aluminum 27. how many significant digits in the measurement "25.000 milliliters"