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Scientific Measurement 7th Grade Science Mr. Liggett

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Why is measurement so important in science? Measurement in science can come in many different forms. All these measurements give us different ways to describe what we see. Measurements are ACURATE and PRECISE Which statement is more useful? The rock is big OR the rock is 13.9 grams Explain your reason

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How can we measure things? We can measure distance (how far apart is it?) We can measure area and volume (how much space does it take up?) We can measure mass (how much matter does it have?) We can measure density (how tightly packed is the matter?)

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What tools can we use to measure? Rulers and Tape Measurers (distance, area and volume) Graduated Cylinder (volume of liquids, density) Triple Beam Balance (mass)

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Self-Check #1 Why is measurement so important in science? What are some ways that we can measure things? What types of tools can we use to measure objects?

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Distance How would you describe distance? Distance is the amount of space in between two points on a straight line.

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How do we measure distance? Tool: Ruler, Tape Measurer, Meter Stick Label: ALWAYS USE METRIC (millimeter, centimeter, meter)

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Measuring Tips: Distance Remember, distance is the length from one point to another. Always put the zero on the first point. BE CAREFUL, some rulers have a zero that does not start on the end.

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Perimeter Perimeter is the distance AROUND and object. To find perimeter, simply add up the sides of an object (P= 2l + 2w) Try it out!

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Area Area is the amount of space INSIDE a 2D object (Think about the space on a floor) Area Formula A = l x w (Area equals length times width) All area labels must be squared. For example: a rectangle with centimeters (cm) must have an area of centimeters squared (cm 2 )

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Area: Try It Out!!

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