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Sci: Metric System
Key terms and examples for measuring in the metric system
| Question | Answer |
|---|---|
| What is the metric system? | a system of measurement based on the number 10 |
| Modern scientists use a version of the metric system called ___________ (abbreviated ____). | International System (SI) |
| What are the advantages of scientists using SI as the standard system of measurements? | Scientists can compare data and communicate with each other about their results accurately without having to convert all the measurements. |
| What number does the prefix "deka-" refer to? | 10 |
| What number does the prefix "hecto-" refer to? | 100 |
| What number does the prefix "kilo-" refer to? | 1,000 |
| What number does the prefix "deci-" refer to? | 0.1 (one tenth) |
| What number does the prefix "centi-" refer to? | 0.01 (one hundredth) |
| What number does the prefix "milli-" refer to? | 0.001 (one thousandth) |
| What prefix refers to the number 10? | deka- |
| What prefix refers to the number 100? | hecto- |
| What prefix refers to the number 1,000? | kilo- |
| What prefix refers to the number 0.1? | deci- |
| What prefix refers to the number 0.01? | centi- |
| What prefix refers to the number 0.001? | milli- |
| How do you convert a metric unit to the next size LARGER? | divide by 10 |
| How do you convert a metric unit the the next size SMALLER? | multiply by 10 |
| What is length? | the distance from one point to another |
| In the SI (metric) system, what is the basic unit to measure length? | meter |
| 1 meter = _______ centimeters | 100 cm |
| What tool is used to measure length? | metric ruler |
| What is mass? | the measure of the amount of matter an object contains (weight) |
| In the SI (metric) system, what is the basic unit to measure mass? | kilogram |
| 1 kilogram = ______ grams | 1,000 grams |
| What tool is used to measure mass? | triple beam balance |
| What is the definition of weight? | a measure of the force of gravity acting on an object |
| What is volume? | the amount of space an object takes up |
| In the SI (metric) system, what is the basic unit to measure volume? | liter |
| 1 liter = _____ milliliters | 1,000 milliliters |
| What tool is used to measure volume? | graduated cylinder |
| What is the formula to measure volume of a rectangular solid? | V=LxWxH (volume = length x width x height) |
| Which unit of measurement below would be best used for volume of a solid object? (A) cubic meter (B) cubic gram (C) liter (D) cubic centimeter | (D) cubic centimeter |
| What is a method that you could use to measure the volume of an irregular solid? | immerse the object in water and measure how much water is displaced |
| What is density? | a measure that compares the mass of an object to its volume |
| What is the formula to measure density of an object? | D=m/v (density = mass divided by volume) |
| Which 2 units of measure would best be used for density? (A) grams per milliliter (B) cubic grams (C) grams per cubic centimeter (D) cubic centimeter | (A) grams per milliliter (C) grams per cubic centimeter |
| Is the density of an substance the same for all samples of the substance? | No |
| An object will float if it is ______ (less or more) dense than the surrounding liquid. | less dense |
| What is the SI unit used to measure time? | second |
| 1 second = 1,000 ________ | milliseconds |
| What is temperature? | the measure of how hot or cold something is |
| What is the temperature scale that scientists commonly use? | |
| What is the official SI unit for temperature? | Kelvin |
| What is true about the Kelvin scale? | |
| What is an equation that shows how two units of measurement are related? | conversion factor |
| What is the abbreviation for kilometers? | km |
| What is the abbreviation for meters? | m |
| What is the abbreviation for centimeters? | cm |
| What is the abbreviation for millimeters? | mm |
| What is the abbreviation for grams? | g |
| What is the abbreviation for kilograms? | kg |
| What is the abbreviation for liters? | L |
| What is the abbreviation for milliliters? | mL |
| Give an example of the approximate length of a millimeter. | the thickness of a credit card OR the thickness of your fingernail |
| Give an example of the approximate length of a centimeter. | the metal band on a pencil eraser OR the width of your pinky fingernail |
| Give an example of the approximate length of a meter. | the height from the floor to a door knob |
| Give an example of the approximate length of a kilometer. | a road |
| What metric unit would you use to measure a the width of a sheet of paper? | centimeters |
| What metric unit would you use to measure the height of a mountain? | kilometers |
| What metric unit would you use to measure the height of a house? | meters |