Students will choose from a number of final project options to describe how the physical characteristics of each organism provide it with a survival advantage in the environment in which it lives.
Zoobooks Magazine. Pictures and information about many animals are available online at http://www.zoobooks.com.Individual magazines and sets can also be purchased (see website or call 1-800-992-5035).
Members of a species are alike in many ways. However, individuals within a species show small differences. Variations are differences in appearance of an inherited trait among the members of a species. Variations can be observed in traits related to size, shape, behavior, function and body parts. Most variations are minor and include differences in hair color, whisker length and flower color. Others may be major and quite apparent like a cat with six toes on each paw or an albino deer. All of these variations are inherited and can be passed down to the offspring from the parent organism.
Variations in individuals may affect their ability to survive in a changing environment. During the course of many generations, a variation that provides a survival advantage can become widespread in a population because individuals within it have a higher probability of reproducing.
Plant breeders take advantage of variations to produce improved crops. For
example, U.S. potato farmers spend millions of dollars each year on pesticides,
but insects become resistant to these pesticides. In Bolivia, a species of wild
potato has hairs on its leaves that release a sticky chemical when touched.
They act like flypaper and trap pests that feed on the leaves of the potato
plant. However, these potatoes are very small. Through plant breeding, scientists
have been able to combine the large size trait of U.S. potatoes with the insect-resistance
trait of the Bolivian potatoes to develop a high yielding, large, insect-resistant
variety of potatoes.
1-Use science process and thinking skills.
2-Manifest scientific attitudes and interests.
3-Understand science concepts and principles.
4-Communicate effectively using science language and reasoning.
Examples of Class Work That Integrates Writing Skills
|Differences unique to the polar bear||Differences unique to the black bear|
||White, transparent, hollow fur||Black &brown fur|
||Black skin underneath|
|Body build &shape|| Large, wide, non- slip paws
||Basically a carnivore||Omnivore|
||Snowy, cold environment||Forested environment|
||Long hind legs||Shorter legs|
||Hunting techniques||Food gathering techniques|
|Live in dens||Layers of blubber
||Swims in the ocean||Climbs trees|
|Smaller in size|
Polar bears and brown bears could be considered cousins that live in far-off lands. Like family members, they have many similar characteristics that indicate they are from the same family. Bears are characterized as having big barrel-shaped bodies covered with thick fur, and stout, strong legs. They have small, circular-shaped ears and elongated noses that end with black nostrils. The claws of a bear are quite ominous-looking and well respected by all. Even though a polar bear and a black bear are very similar, however, they also have major differences. These differences help them survive in extremely different environments.
In the cold, frozen barren world of snow and ice surrounded the vast Arctic Sea lives the aggressive polar bear. Polar Bears have many physical features that help them survive in this hostile environment. Their fur is transparent which allows sunlight to penetrate their black skin, that absorbs light and converts it into heat. The whiteness of their fur allows them to blend in with their snowy surroundings. One of the most amazing things about a polar bear is its paws. These wide paws, have nonslip pads that enable them to travel over the snow and ice without slipping. Everything about a polar bear makes it perfect for a climate where very few animals can survive.
In the more temperate forest regions lives the much smaller, timid black bear. The black bear is considered to be the smallest bear in North America. But all black bears aren't really all black. Some have rusty-brown or gray fur mixed in with the black that helps them to blend into their surroundings of dark forested pines. Its smaller size helps it to climb trees to remove birds ' eggs and get honey from beehives. Whether the black bear knows it 's small or just because it is timid, it avoids being seen and stays hidden in the foliage of the woods. However, the black bear does have very sharp claws and teeth that can rip open tree stumps and tear branches off trees. Black bears are definitely more suited for the forested woodlands. The black bear would not be comfortable going to visit his polar bear cousins up North.
|Poem in Modified Diamante Format|
gigantic furry white
prowling in the arctic wasteland
hunting eating sleeping
hiding in the darkened forest
Modified Diamante Format Used for Poem Above
*A participle is an action verb ending with “ing ”
This lesson is part of the Fifth Grade Science Teacher Resource Book (TRB3) http://www.usoe.org/curr/science/core/5th/TRB5/. The TRB3 is designed to be your textbook in teaching science curriculum to your students. This book covers all the objectives of each standard and benchmark. If taught efficiently, a student should do well on the End-of-Level (CRT) tests. The TRB3 is designed for teachers who know very little about science, as well as for teachers who have a broad understanding of science.