Scientific Measurement

1. Scientific Measurement 7th Grade Science Mr. Liggett

2. 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

3. 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?)

4. 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)

5. 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?

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

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

8. 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.

9. 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!

10. 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 (cm2)

11. Area: Try It Out!!