# Safety first.

In "Revved-Up Athletes" (p. 16), you read about what race-car drivers do to keep physically fit for the Indy 500. But how do they keep themselves safe? In the last 100 years there have been many changes to the cars, engines, tires, speeds, and even drivers' outfits to ensure their safety.

Directions: Study the chart below showing the number of safety items introduced throughout 100 years of auto racing. Then, calculate the total number of safety items introduced and the percent of items in each time period. Place your answers in the spaces provided. (Hint: To find the percent, divide the part by the whole and multiply by 100.)

```Percent of Safety Features added to
Race Cars by Time Period

1903-1919    5.9%
1920-1939   14.7%
1940-1959   17.6%
1960-1979   20.6%
1980-2003   41.2%

Note: Table made from pie chart.
```

[GRAPHIC OMITTED]

Graph It

Use the chart above to complete the circle graph.

Analyze It

1. What overall trend do the data show?

2. Between which two periods did the number of safety items double?

3. The greatest number of safety items was introduced during which time period? Why do you think this is so?

4. What do you think some of these safety items might be?

Answer

```Safety Features Added to Race Cars,
by Time Period

Number of
Safety Items   Percent of
Time Period    Introduced      Total

1903-1919         2            5.9%
1920-1939         5           14.7%
1940-1959         6           17.6%
1960-1979         7           20.6%
1980-2003         14          41.2%
Total           34           100

Percentage of Safety Features added to
Race Cars by Time Period

1903-1919     5.9%
1920-1939    14.7%
1940-1959    17.6%
1960-1979    20.6%
1980-2003    41.2%

Note: Table made from pie chart.
```

1. The data show that more safety items were added to the race cars as time progressed.

2. The number of safety items introduced doubled from ? in the 1960-1979 era to 14 in the 1980-2003 era.

3. Answers will vary, but should include: The greatest number of safety items were introduced from 1980-2003. This may be because of technological advances in car design, lessons learned from accidents, and greater awareness of drivers' safety needs.

4. Answers will vary, but may include: Some of these safety features are: goggles, helmets, special suits, seatbelts, roll cages, shoulder harnesses, special tires, fire extinguishers in the cockpit, safer engine design, and more.

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No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2009 Gale, Cengage Learning. All rights reserved.

Title Annotation: Printer friendly Cite/link Email Feedback GRAPHING ACTIVITY Science World 1USA May 11, 2009 391 Science news. Too many tourists. Automobile racing drivers Automobiles, Racing Race car drivers Race cars

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