Magnitude

• What should you be able to describe by the end of the video?

  Order of magnitude
• Why do scientists use the concept of order of magnitude?

  To compare approximate sizes of different objects
• How many millimeters are in a meter?

  1,000 millimeters
• What does "one order of magnitude" mean?

  • One order of magnitude means 10 times larger.
• How do scientists describe the sizes of an apple and an orange?

  They are around the same order of magnitude
• How much larger is a pineapple compared to a small lemon?

  A pineapple is around 10 times larger
• How many orders of magnitude larger is a dog compared to a woodlouse?

  Two orders of magnitude
• What does each order of magnitude represent?

  Each order is 10 times greater
• How can you determine the order of magnitude by counting zeros?

  Count the number of zeros in the number
• If a fox is 40 cm long and a tick is 0.4 cm long, how many times longer is the fox?

  100 times longer
• How do you calculate the order of magnitude from the fox and tick example?

  By dividing 40 by 0.4
• How many zeros are counted to determine the order of magnitude in the fox and tick example?

  Two zeros
• What are the key concepts of order of magnitude calculations?

  • Comparing sizes of objects
  • Each order is 10 times greater
  • Counting zeros to find orders