Unit 1 Math/Science

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Across
  1. 3. a way to write a number that shows the value of each digit as the sum of the digit multiplied by its place value
  2. 5. addend = sum, the sum being the largest number in the equation (inverse of subtraction)
  3. 6. a combination of 2 or more substances that keep their own properties; examples are fruit salad, chex mix and sand with iron filling
  4. 8. one of 10 equal parts; the first place to the right of the decimal; part of the whole
  5. 10. a way to estimate using pairs of numbers that can be easily computed mentally; mostly used in division in 5th grade - use the first digit/digits in dividend and change it to a multiple of the divisor, example; 3.720 divided by 58 using compatible numbers becomes 3,600 ÷ by 60 = 60
  6. 13. the amount of matter compacted into a given volume of a substance - more dense than water - sinks - less dense than water - floats
  7. 14. the operation of taking one number or amount away from another; minuend - subtrahend = difference, the minuend being the largest number in the equation (inverse of addition)
  8. 18. a special mixture of two or more substances that are evenly distributed throughout - two parts to a solution are solute (solid) and solvent (liquid) - water is the universal solvent; examples - saltwater and kool-aid
  9. 19. the operation of using repeated addition of the same number; the combining of equal groups; factor x factor = product, the product being the largest number in the equation (inverse of division)
  10. 21. anything that takes up space and has mass
  11. 22. the operation of finding the total, or sum, by combining 2 or more numbers;
  12. 24. one of 1000 equal parts; the third place to the right of the decimal; part of the whole
Down
  1. 1. is a way of solving problems that uses repeated trials in a set of steps to make sure your answer is accurate and based on evidence; steps in a science experiment
  2. 2. greek root word meaning life: biology, biography, autobiography
  3. 4. one of 100 equal parts; the second place to the right of the decimal; part of the whole
  4. 6. the pulling force of a magnet - being attracted to a magnet
  5. 7. greek root word meaning earth; geography, geothermal, geometry
  6. 9. characteristics of a substance that can be measured or observed without changing the substance (how it looks, smells, feels, tastes, and/or sounds); example - hair is still hair after a haircut and paper is still paper after it is torn
  7. 11. a form of matter - solid (definite shape & volume), liquid ( no definite shape & definite volume), and gas (no definite shape & no definite volume)
  8. 12. to use reasoning to determine an approximate value; an answer that is close to the exact one
  9. 15. a material that stops or slows the flow of heat, electricity, or sound - glass, plastic, and rubber are examples of insulators
  10. 16. (solubility) able to be dissolved in or by a liquid; salt and sugar or soluble, iron filling and sand are insoluble (not soluble)
  11. 17. a material that easily transfers heat or electricity, metals are good conductors; copper being the best conductor
  12. 20. the amount of matter in a solid, liquid, or gas, it is what is on the inside, measured with a triple beam balance or balance in grams
  13. 23. the operation of making equal groups to find the number of groups in each group or to find the number of equal groups using repeated subtraction; dividend ÷ divisor = quotient, the dividend being the largest number in the equation (inverse of multiplication)