Do you know that rules are everywhere? We have rules at home, rules at school, rules at the store, and rules on the road! We have rules for riding bikes, driving cars, flying airplanes, and even for swimming. Why do we have so many rules? Well, for one thing, rules help us know what to do. We know to stop at a red light and to go when the light turns green. We know to use our indoor voices in the lunchroom and save our outdoor voices for recess. At the store we know the rule is to take our things to the checkout Some people believe that the word turtle is another word for tortoise. They believe that the two words are names for the same animal, but that is not true. Turtles and tortoises are related, and they are both reptiles. However,there are differences between these two animals. Most turtles live in salt water and can swim. They have hard shells and flippers for swimming. Tortoises usually live on land. Land tortoises have legs instead of flippers so that they can move on land. Sometimes tortoises live in fresh water, but not in salt water like turtles. The tortoises which live in freshwater have webbed feet and sharp claws so that they can move well in water and on land, as well. Both turtles and tortoises hatch from eggs and both can grow to be very large. Both animals have been around since prehistoric times.