McGraw-Hill Mathematics: Grade 4, Chapter 9

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Marine Metrics

Two Oceans Aquarium
http://www.aquarium.co.za

See how metric units are used to help describe a South African aquarium and some of its animal inhabitants.

• Click the words to enter the Web site. Then click Exhibits.
• Read about the Kelp Forest. Answer questions 1 through 3 on your activity sheet.
• Read about the I & J Predator Exhibit. Answer question 4.
• Click The I & J Predator Exhibit. Answer questions 5 and 6.

Use the information at the aquarium exhibit to answer the following questions. Circle the better estimate. You will need to know the following metric equivalents:

100 centimeters (cm) = 1 meter (m)
10 decimeters (dm) = 1 meter (m)
1,000 milliliters (mL) = 1 liter (L)
1,000 grams (g) = 1 kilogram (kg)

1. The Kelp Forest exhibit is 6 meters deep. This distance is
   
   A. more than the height of your classroom.
   
   B. less than the height of your classroom.




2. The Kelp Forest exhibit holds                                              liters of seawater. This amount of water is
   
   A. more than 700,000 milliliters.
   
   B. less than 700,000 milliliters.




3. A fish swims straight across the Kelp Forest from the left edge to the right edge. Then he swims back. The fish swims
   
   A. more than 100 meters.
   
   B. less than 100 meters.




4. Visitors can view the I & J Predator Exhibit through a see-through panel. The panel is                                              meters high. The panel is
   
   A. more than 4 centimeters high.
   
   B. less than 4 centimeters high.




5. Every third day, the fish are fed about                                             kilograms, which is
   
   A. 330 grams.
   
   B. 33,000 grams.




6. Ragged tooth sharks travel to depths of up to                                             meters, which is
   
   A. 2,000 decimeters.
   
   B. 20,000 decimeters.

Math at Home

Today I explored a Web site that gave information about an aquarium in South Africa. I converted metric units to solve some math problems. For instance, I found out that adult ragged tooth sharks are about                    meters long, which is                    than an adult person.

You can find out more about this topic by asking your teacher or parents to show you other Web sites.