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Bearcat day 28- Plant defenses After watching the video about plant defenses, answer the following questions. Your email address ([email protected]) will be recorded when you submit this form. Not you? Switch account T3tgpygddTTESS3 * Required

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True or False; Plants cannot defend themselves against threats. * 1 point

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Pick 3 ways plants can defend themselves * 3 points

By doing nothing

Releasing chemicals

Having tough coverings over important parts

Having spines or throrns

Physically moving away from the threats Grade 7 Bearcat 4/22/20, 3:59 PM 4/22/20, 3:59 PM Page 2 of 3 Day 28 Science Page 3 of 3

4 of 5 5 of 5 Grade 7 Bearcat Day 28 Science page Grade 7 Bearcat Day 28 Science page True or false: Plant cells have an immune system. * 1 point True or False; If a plant is under a#ack or threatened it can send messages 1 point to warn other plants. * True True False False

If pa" of a plant is damaged, those cells will most likely 1 point ______to protect the rest of the plant. * Some plants, like co#on plants, can recruit help if it under a#ack. Which 5 points organism a#acks the co#on plant and how does the co#on plant !ght Reproduce back? Explain your response using details from the video. *

Self destruct Your answer

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This form was created inside of Anderson County Schools. Report Abuse When pa" of a plant is under a#ack, which ways can it ale" other pa"s of 1 point itself? * Forms

Hormones, electrical impulses, airborne compounds

electrical impulses and guard cells

Hormones and wind

Sudden death Grade 7 Bearcat Day 28 Social Studies 2 of 9 Grade 7 Bearcat Day 28 Social Studies page CHAPTER 24.2 The in These drawings were created in Mexico the around 1540 to show details of Aztec life. The arose in the Valley of Mexico, a fertile area nearly 8,000 feet above sea level. l of 9 By the time the Aztecs arrived in page the mid 1200s C.E., the valley had The Aztecs been a center of civilization for more than a thousand years. Two 24.1 Introduction groups in particular had built In Chapter 23, you read about the Mayan civilization of southern Mexico and civilizations there that strongly Central America. In this chapter, you will learn about the Aztecs, a Mesoamerican influenced the Aztecs. Let's take people who built a vast empire in central Mexico. The Aztec Empire flourished from a brief look at these civilizations. 1428 to 1519 C.E., when it was destroyed by invaders from Spain. Then we'll see how the Aztecs The Aztecs had a colorful legend about the beginnings of their empire. came to the valley and gradually Originally a wandering group of hunter-gatherers, the Aztecs had a belief that one rose to power. day they would receive a sign from the gods. They would see an eagle perched on a Teotihuacan, the "City of the Gods," Civilization in the Valley of Mexico From about 100 to great cactus with "his w i n g s stretched toward the rays of the sun." In its beak, the was an expansive city of plazas, 650 C.E., the Valley of Mexico was dominated by the Teotihuacans. eagle would hold a long snake. When they saw this eagle, the Aztecs would know pyramids, and avenues. The Pyramid These people built an enormous capital city, Teotihuacan. One of the they had found the place where they would build a great city. of the Sun, shown above, was city's buildings, t h e Pyramid of the Sun, was more than 200 feet high. In the mid 1200s C.E., the constructed of volcanic rock and After Teotihuacan's collapse around the 700s, a group from the Aztecs entered the high Valley of limestone. north, the , migrated into the valley. T o l t e c civilization reached Mexico, a fertile basin in central its height in the 10th and llth centuries. The Toltecs built a number of Mexico. Several times other cities. Their capital, Tollan, boasted large pyramids topped with temples. groups in the valley pushed the During the 1100s, new groups invaded the valley. They took over Aztecs away from their lands. In cities and established new city-states. But the influence of the 1325, the Aztecs took refuge on an Toltecs and the Teotihuacans continued to be felt in the culture that was island in Lake Texcoco. There developing in the valley. Aztec priests saw the eagle, just as The Arrival of the Aztecs Sometime around 1250 C.E., a n e w the gods had promised. And so the group arrived in the Valley of Mexico. A nomadic band of hunter- Aztecs set about building a city gatherers, they called themselves the . We know them today they called , as the Aztecs. which means "the place of the The name Aztec comes from Aztlan, the ' legendary home- fruit of the prickly pear cactus." land. According to Aztec tradition, A z t l a n was an island in a lake to In time, the island city became the northwest of the Valley of Mexico. The Aztecs had left the island the center of the Aztec Empire. around 1100 C.E. They wandered through the deserts of northern In this chapter, you will learn Mexico for many years before coming to the Valley of Mexico. more about where the Aztecs When the Aztecs came to the heart of the valley, they found lakes came from and how they built mercenary a soldier who is dotted with marshy islands. Thriving city-states controlled the land their magnificent capital c i t y . paid to fight for another country around the lakes. You'll also discover how this or group The Aztecs had a difficult time establishing t h e m s e l v e s in the humble band of nomads rose valley. The people living in the city-states thought the Aztecs were to become the masters of a crude barbarians. But the Aztecs were fierce warriors, and the city- great empire. states were willing to employ them as mercenaries.

The Aztecs 271 272 Chapter 24 3of 9 Grade 7 Bearcat Day 28 Social Studies page Grade 7 Bearcat Day 28 Social Studies page 4 of 9 After settling in the valley, the Aztecs began to The Valley of Mexico, About 1500 be influenced by the legacy of the Teotihuacans and 24.3 Tenochtitlan: the Toltecs. They made pilgrimages to the ancient 10 20 miles A City of Wonders ruins of Teotihuacan. They adopted Quetzalcoatl, 10 20 kilometers As the Aztecs' power grew, the Teotihuacans' feathered serpent god, as one of their capital city of Tenochtitlan their own gods. developed into one of the largest The Aztecs viewed the Toltecs even more highly, cities in the world. When Spanish as rulers of a Golden Age. Aztec rulers married into explorers first glimpsed Tenoch- the surviving T o l t e c royal line. The Aztecs even titlan in 1519, they were amazed began to claim the Toltecs as their own ancestors. to see a majestic city crisscrossed In 1319, stronger groups forced the Aztecs to by canals and boasting impressive move away from , a rocky hill where temples and palaces. With a they had made their home. The Aztecs fled to the population of between 200,000 south, where they became mercenaries for the city- .Teotthuacan and 300,000 people, Tenochtitlan state of . But trouble came again when was larger than London, Paris, Tenochii1ii:i« or Venice. the Aztecs sacrificed the daughter o f the Colhua Chapullepec* How did the Aztecs turn an chief. This led to a war with the Colhuas, who 'Culhuacan drove the Aztecs onto an island in the shallow unwanted island into such a great waters of Lake Texcoco. city? First they reclaimed land from the lake by sinking timbers It was here, the Aztecs said, that they spotted an into the water to serve as walls eagle perched atop a cactus with a long snake in its and filling in the area between the beak. Grateful for the sign they had been waiting limbers with mud, boulders, and for, the Aztecs set to work building the city they reeds. In this way they created called T e n o c h t i t l a n . small islands called , The island turned out to be a good site for the The Aztecs of Tenochtitlan farmed on or "floating gardens/' Eventually the Aztecs expanded the city's land Aztecs' city. The lake provided fish and water birds chinampas, small floating islands they surface until it covered over five square miles. They even merged for food, and the island was easy to defend. Over constructed from mud and plants. Tlatelolco, originally a separate island, with Tenochtitlan. time, the Aztecs' new home would grow into one of the great cities of Gradually, Tenochtitlan grew into the magnificent city that so the world. amazed the Spanish. A t the center of the city—both physically and From Mercenaries to Empire Builders The Aztecs started spiritually—lay a large ceremonial plaza. Here the Aztecs gathered building Tenochtitlan in 1325 C.H. For the next 100 years, they served as for religious rituals, feasts, and festivals. A wall about eight feet tall mercenaries for a powerful group called the . Through this enclosed this area. The wall, which was called the Coatepantli ("snake alliance the Aztecs gained land, trading connections, and wealth. alliance a group of countries, wall"), was studded with sculptures of serpents. The palaces and homes Eventually, however, the Aztecs rebelled against the heavy-handed city-states, or other entities who of nobles lined the outside of the wall. rule of the Tepanecs. Under the Aztec leader , T e n o c h t i t l a n agree to work together, o f t e n to Inside the plaza, a stone pyramid called the Great Temple loomed fight common enemies joined with two other city-states in the Triple Alliance. In 1428, the 150 feet into the sky. People could see the pyramid, which was decorat- alliance fought and defeated the Tepanecs. Together the allies began a ed with bright sculptures and murals, from several miles away. It had series of conquests that laid the foundation for the Aztec Empire. two steep stairways leading to double shrines. One shrine was dedicat- As Tenochtitlan b e c a m e a great power, Itzcoatl set out to reshape ed to the chief god, . The other was dedicated to Tlaloc, Aztec history. He burned records that referred to his people's humble plaza a public square or other the rain god. In front of the shrines stood the stone where priests per- origins. Instead, he connected the Aztecs to the distinguished Toltecs. open area in a city where people formed human sacrifices. An altar called the tzompantli ("skull rack") With their growing power and a glorious (though legendary) past, can gather displayed the skulls of thousands of people who had been sacrificed. the Aztecs were ready for their new role as empire builders. Let's look (You will learn more about the role of human sacrifice in the Aztec now at the great city that would become the center of their empire. religion in the next chapter.) Other structures in the plaza included

The Aztecs 273 274 Chapter 24 5 of g 6 of 9 Grade 7 Bearcat Day 28 Social Studies page Grade 7 Bearcat Day 28 Social Studies page more shrines and temples, the ritual ball court, military storehouses, 24.4The Aztec Empire and guest rooms for important visitors. The Aztec Empire, Early 1500s Just outside the plaza stood the royal palace. The two-story palace Tenochtitlan began as simply the seemed like a small town. The palace was the home of the Aztec ruler, Aztecs' home city. After the Aztecs and their allies defeated the Tepanecs but it also had government offices, shrines, courts, storerooms, gardens, (.iiilf of Mexico and courtyards. At the royal aviary, trained staff plucked the valuable aviary an enclosed space or in 1428 C.E., the city became the capital of a growing empire. Under feathers of parrots and quetzals. Wild animals captured throughout the cage for keeping birds -VALLEY Tenochtitlan, OF MEXICO Moclezuma I in the mid 1400s, the empire, like pumas and jaguars, prowled cages in the royal z o o . causeway a raised road built Aztecs extended their empire to The city's main marketplace was located in the northern section, in across water or low ground faraway regions. Tlatelolco. Each day as many as 60,000 people came from all corners dike a wall or dam built to hold of the Aztec Empire to sell their wares. Goods ranged from luxury back water and prevent flooding By the early 1500s, the Aztec AZTEC Empire stretched from the Gulf of items like jade and feathers to necessities like food and rope sandals. EMPIRE Merchants also sold gold, silver, turquoise, animal skins, clothing, Mexico to the Pacific Ocean. It covered pottery, chocolate and vanilla, tools, and slaves. much of Central Mexico and reached as far south as the current border with Although Tenochtitlan spread over five square miles, people had Temples dedicated to various gods PACIFIC OCEAN Guatemala. At its height, the empire an easy time getting around. Four wide avenues met at the foot of the rose along the streets and canals of included more than five million people. Great Temple. A thousand workers swept and washed down the streets the city of T e n o c h t i t l a n . 100 200 miles _J An Empire Based on Tribute each day, keeping them cleaner than streets 100 200 kilometers in European cities. At night, pine torches Unlike other empire builders, the Aztecs did not start colonies. Nor did they force conquered peoples lit the way. People also traveled by foot to adopt their ways. Instead, the Aztec Empire was a loose union of on smaller walkways or by canoe on the hundreds of city-states that were forced to pay tribute to the Aztecs. canals that crossed the city. Many of the canals were lined with stone and had Collecting tribute was the empire's most important business. The bridges. Aztecs relied on tribute to support Tenochtitlan's huge population. Tribute took the form of whatever valuable items a city could provide. Three causeways linked the island Cities might pay in food, cacao, gems and stones, cotton, cloth, animals, to the mainland. The longest of them animal skins, shells, building materials, or even soldiers. Tax collectors stretched five miles. The causeways were stationed around the empire made sure that cities paid regularly. 25 to 30 feet wide. They all had wooden Each year, huge amounts of goods flowed into Tenochtitlan. An bridges that could be raised to let boats average year brought 7,000 tons of maize; 4,000 tons each of beans, through or to protect the city in an enemy seed, and grain; and at least 2 million cotton cloaks. Warriors, priests, attack. officials, servants, and other workers all received payment in tribute The city boasted other technological goods. marvels, like the aqueduct that carried Warfare The demands of the empire made war the center of fresh water for irrigation. Twin pipes ran Aztec life. Successful battles allow the Aztecs to increase their sources from the Chapultcpec springs, three miles of tribute. They also gained more territory, laborers, and sacrificial away. While one pipe was being cleaned victims. As you will learn in the next chapter, the Aztecs believed that or repaired, the other could transport water. their chief god, Huitzilopochtli, required human blood for s u r v i v a l , A dike 10 miles long ran along the east so in war they took as many prisoners as possible to use in sacrifices. side of the city to hold back tloodwaters. They also used the threat of human sacrifice to frighten city-states Thousands of people visited Tenoch- into paying tribute. titlan each year. Some came to do business. Every male Aztec was trained to be a soldier. In battle, the Aztecs Others came as pilgrims. Still others came used weapons such as bows and arrows, spears, clubs, and wooden simply to gaze in wonder at the capital of swords with sharp stone blades. Warrior knights carried shields decor- the Aztec world. ated with figures of animals such as the jaguar and eagle. The figures

The Aztecs 275 276 Chapter 24 Grade 7 Bearcat Day 28 Social Studies 7 of 9 page represented different strengths that the Aztecs 8 of 9 believed they received from these a n i m a l s . Grade 7 Bearcat Day 28 Social Studies page An Aztec declaration of war followed a ritu- alized pattern. First, the Aztecs asked a city to join the empire as an ally. The city had 60 days to agree. If the ruler refused, the Aztecs declared war. The battle began when thousands of Aztec warriors descended upon the city. As the armies faced each other, a general gave the signal to attack. Aztec warriors excelled at h a n d - t o - h a n d fighting. Most wars ended after one battle, usually with an Aztec victory. After the city had fallen, the Aztecs brought their captives to Tcnochtitlan. Some became slaves, but most were sacrificed to Huitzilopochtli. The Aztecs made only a few demands on the defeated city. The people had to pay tribute, honor the god Huitzilopochtli, and promise o b e - dience to the Aztec ruler. Otherwise, conquered cities remained independent. They kept their religion, customs, and language. They usually even kept their leaders. These lenient conditions made it easy for the Aztecs to rule. But most of the conquered peo- ple never thought of themselves as true Aztecs. They wanted their These modern drawings of Aztec life freedom. These feelings led to a lack of unity in the Aztec Empire. show some of the forms of tribute Eventually, the Spanish would take advantage of that weakness by paid to the Aztecs, such as feathers, making allies of the Aztecs' enemies when they invaded Mexico in jade, and tiger skins. 1519. You will learn more about the Spanish conquest of the Aztecs in Unit 7. 24.5 Chapter Summary In this chapter, you learned about the rise of the Aztecs from a band of nomads to the masters of a great empire. The Aztecs arrived in the Valley of Mexico in the mid 1200s C.E. I n 1325, they begun building their capital city of Tenochtitlan. But the Aztec Empire only began to emerge in 1428, when the Aztecs and their allies rebelled against the Tepanecs, Over the next 100 years, the Aztecs expanded their empire through warfare and alliances. Eventually t h e empire included hundreds of cities and millions of people. In the next chapter, you will learn about the daily life of the Aztecs at the height of their empire.

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