Challenge 1

Can you figure out how to make the balance even?

If 2 diamonds = 1 circle and 2 squares = 3 circles, what do you need to

balance out 1 square?

Can you figure out how to make the balance even?

If 2 diamonds = 1 circle and 2 squares = 3 circles, what do you need to

balance out 1 square?

Can you figure out how to make the balance even?

If 2 diamonds = 1 circle and 2 squares = 3 circles, what do you need to

balance out 1 square?

Can you figure out how to make the balance even?

If 2 diamonds = 1 circle and 2 squares = 3 circles, what do you need to

balance out 1 square?

Equations to solve problem:

If 2 d = 1 c and 2 s = 3 c then 2 s = 3(2 d)2 s = 6 d, or 1 s = 3 d

1s = (d + d) + d, therefore 1s = (1c) + d

Challenge 2L. LaRosa http://www.middleschoolscience.com for T. Trimpe 2008 http://sciencespot.net/

1 g

10 g

20 g

50 g

100 g

197 g 5 g

Using a total of 7 brass weights, can you balance this balance?

Some weights can be used more than once

1 g

10 g

20 g

50 g

100 g

Using a total of 7 brass weights, can you balance this balance?

197 g

5 g

100 g

20 g

50 g

1 g1 g

5 g

20 g

Challenge 3L. LaRosa http://www.middleschoolscience.com for T. Trimpe 2008 http://sciencespot.net/

1 g

10 g

20 g

50 g

100 g

63 g 5 g

Can you balance the balance below by using the fewest number of weights?

Some weights can be used more than once

14 g

1 g

10 g

20 g

50 g

100 g

63 g

5 g

Can you balance the balance below by using the fewest number of weights?

Some weights can be used more than once

14 g

Challenge 4L. LaRosa http://www.middleschoolscience.com for T. Trimpe 2008 http://sciencespot.net/

100 g 20 g 10 g10 g

5 g5 g 5 g

5 g

1 g1 g

10 g

What is the total mass? Where should the riders be?

100 g 20 g 10 g10 g

5 g5 g 5 g

5 g

1 g1 g

10 g

What is the total mass? Where should the riders be?

172 g

http://www.ohaus.com/products/education/weblab/TBBread.html

Challenge 5L. LaRosa http://www.middleschoolscience.com for T. Trimpe 2008 http://sciencespot.net/

Complete the following conversions for grams and kilograms:

5,250 g = ____ kg 1,998 g = ____ kg 610 g = ____ kg 40 g = _____ kg

8.1 kg = ______ g 2.92 kg = ______ g 0.73 kg = ______ g 0.01 kg = ______ g

Complete the following conversions for grams and kilograms:

5,250 g = 5.25 kg 1,998 g = 1.998 kg 610 g = 0.61 kg 40 g = 0.04 kg

8.1 kg = 8,100 g 2.92 kg = 2,920 g 0.73 kg = 730 g 0.01 kg = 10 g

÷ 1,000 x 1,000

Challenge 6L. LaRosa http://www.middleschoolscience.com for T. Trimpe 2008 http://sciencespot.net/

Unscramble the following words related to mass

a. amrsgb. msliaokrgc. elncabad. rridse e. maeb f. napg. rtpeion

Unscramble the following words related to mass

a. amrsgb. msliaokrgc. elncabad. rridse e. maeb f. napg. rtpeion

a. Gramsb. Kilogramsc. Balanced. Riders e. Beam f. Pang. Pointer

Challenge 7L. LaRosa http://www.middleschoolscience.com for T. Trimpe 2008 http://sciencespot.net/

Complete the following conversions for grams and milligrams:

7,165 mg = ____ g 3,110 mg = ____ g 430 mg = ____ g 88 mg = _____ g

9.56 g = _____ mg 4.2 g = _____ mg 0.18 g = _____ mg 0.007 g = ____ mg

Complete the following conversions for grams and milligrams:

7,165 mg = 7.165 g 3,110 mg = 3.11 g 430 mg = 0.43 g 88 mg = 0.088 g

9.56 g = 9,560 mg 4.2 g = 4,200 mg 0.18 g = 180 mg 0.007 g = 7 mg

÷ 1,000 x 1,000