Desert Compare day and night in the Sonoran and Sahara deserts with this back-to-back mini-book. Habitat Hallmarks D eserts cover about one-fifth of the earth’s land surface and can be found on all the continents, except Europe. Deserts receive less than 10 inches (25 cm) of rain each year. The entire amount may fall over just a few days, a few weeks, or not at all. Parts of the Sahara Desert in northern Africa have received no rain for 20 years. Stretching from the Red Sea to the Atlantic Ocean, the Sahara is the largest desert in the world. It covers more than 3.5 million square miles (9 million sq km). Much of the desert consists of stony plains swept free of sand by desert winds, but large areas are also covered by sand dunes. Summer temperatures typically reach up to 110°F (43°C). The highest temperature on Earth—136°F (58°C)—was recorded in the Sahara in 1922. During winter nights, however, temperatures can plunge to below freezing. With such intense conditions, few kinds of animals can survive here—jackals, jerboas, lizards, cobras, oryx, aoudads, and the world’s deadliest scorpion. About 3 million people also call the Sahara home, and many still use camels to travel around the desert. Palms and a few plants grow at oases, nourished by underground water. The Sonoran Desert in the southwestern United States, on the other hand, contains the greatest diversity of desert plants found anywhere. This desert is only about 120,000 square miles (311,000 sq km), but it is home to saguaro cacti that grow up to 50 feet (15 m) tall; yuccas that store water in their stems; shrubs that grow leaves only when it rains; and American mesquite trees with roots that reach deep underground for water. Daytime temperatures can reach above 115°F (46°C), and so most animals here hide under rocks, in plant holes, or in underground burrows. When the desert cools off at night, these animals come out to hunt for food. But they would do well to watch out for other night predators, such as tarantulas, rattlesnakes, and Gila monsters, which use poison to kill their prey. Materials ❉ Reproducible pages 22–24 ❉ Scissors ❉ Tape ❉ Stapler ❉ Crayons, colored pencils, or markers (optional) 20 Making the Mini-book 1 Photocopy pages 22–24. 2 Cut out the mini-book pages along the thick, solid lines. Easy Make & Learn Projects: Animal Habitats © 2010 by Donald M. Silver and Patricia J. Wynne, Scholastic Teaching Resources Desert 3 Cut out the center of each cover along the thick, solid lines. Then cut out the text block from the center of each piece. Tape each text block to the back of its respective cover, as shown. 4Cut the windows on the interior page so they fold open, as shown. 5 Place the page with spot art behind the interior page so that the illustrations match behind their respective windows. 6 Fold the pages in half along the dashed lines. Place the Sonoran Desert cover on top of the cactus illustration. 7 Turn the mini-book over and place the Sahara Desert cover on top of the sand dune illustration. Staple the mini-book at left, as shown. More to Do Desert World Invite students to research other deserts, such as the Gobi in east-central Asia, Death Valley in the United States, the Kalahari in southern Africa, the Arabian on the Arabian Peninsula, and the Atacama in Chile and Peru. Describe the plants and animals in each desert and how they are adapted to survive. You may also want to encourage students to find out about the dinosaur fossils discovered in the Gobi Desert. Resources One Small Square: Cactus Desert by Donald M. Silver and Patricia J. Wynne (McGraw-Hill, 1998). Teaching With the Mini-book Students explore the wonders of the Sonoran Desert by day, by night, and after it rains. Invite students to color, assemble, and read their mini-books. Have them read the Sonoran Desert side first, then turn over the book to read about the Sahara Desert. Check students’ understanding by asking them these questions: http://www.ucmp.berkeley. edu/exhibits/biomes/ deserts.php 1 How are the Sonoran and Sahara deserts alike? (Both are very hot and dry, but cool down at night.) Photographs and simple text offer a glimpse of different types of deserts around the world. 2 How are the two deserts different? (Different plants and animals live in each desert. The Sahara has sand dunes and oases, and the Sonoran Desert doesn’t.) 3 Where do cactuses get water? (They store water when it rains.) 4When do animals come out in the desert? (Most come out in the morning before it gets too hot and at night when the desert cools.) Easy Make & Learn Projects: Animal Habitats © 2010 by Donald M. Silver and Patricia J. Wynne, Scholastic Teaching Resources 21 Desert 5 Cover Sahara Desert Most of the Sahara is stony and flat. In some parts, winds blow sand into hills, called dunes. Some sand dunes are more than a hundred feet high. Cut out. Sonoran Desert Hedgehog Cactus wren Some animals hunt for food in the morning. To escape the afternoon heat, they hide in holes, under rocks, or underground. Desert tortoise Cut out. Horned lizard The Sonoran desert is very hot and dry. It does not rain here very often. When it rains, cactuses store water inside them. Without water, they cannot stay alive. 22 Gambel’s quail Easy Make & Learn Projects: Animal Habitats © 2010 by Donald M. Silver and Patricia J. Wynne, Scholastic Teaching Resources Sandgrouse and chicks The Sahara Desert is very hot and dry. Palms and other plants grow in the desert’s oases. Water comes from deep underground. Desert 5 Interior pages Lanner falcon Dromedary camels Scimitar-horned oryx Horned viper Easy Make & Learn Projects: Animal Habitats © 2010 by Donald M. Silver and Patricia J. Wynne, Scholastic Teaching Resources Spiny mouse Desert wheatear Aoudad These animals come out in the morning before the Sahara heats up. Open the flaps to see creatures that come out in the cool Sahara night. Turkey vulture Harris’s hawk Spiny-tailed lizard Vermillion flycatcher Gila woodpecker Hummingbird Roadrunner Saguaro cactus Pronghorn Antelope squirrel Whiptail lizard Lift the flaps. These animals come out at night when it is cool. Watch out! Both rattlesnakes and Gila monsters are poisonous. Jackrabbit 23 Desert 5 Insert Scorpion Jerboa Fennec fox Sphinx moth 24 Bobcat Javelina Diamondback rattlesnake Gila monster Easy Make & Learn Projects: Animal Habitats © 2010 by Donald M. Silver and Patricia J. Wynne, Scholastic Teaching Resources Bat Elf owl
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