Math Focus 2
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# Surf for More Math

## CHAPTER 10: MASS

### Lesson 1: Comparing Masses

Use these interactive activities to encourage students to have fun on the Web while learning about the mass of objects. Students can try these activities on their own or in pairs.

Goal

Compare and order objects by mass, and explain the method of ordering.
[C, R]

Instructions for Use

Bunny Balance lets students estimate the mass of objects using non-standard units.

To use Bunny Balance, drag the bunnies onto the seesaw. Try to make them balance.

Weigh it Up lets students measure, and record the mass of objects using non-standard units.

To use Weigh it Up, click on the + to add a shape. Click on the − to remove a shape. Click on Check to see if the scales balance. To clear the scales, click the Reset button.

Pan Balance prompts students to use a pan balance to determine which item is heavier.

To use Pan Balance, place weights on each pan of the balance by dragging the shapes and releasing the mouse button. The Count Items button shows how many shapes are on the balance. The Show Array button shows how many shapes are on the balance in a row. The Reset Balance button clears the balance and keeps the weights the same. The New Problem button clears the balance and changes the weights.