National Geographic Explorer. Lesson 1 Raising Raptors

Transcription

1 National Geographic Explorer Lesson 1 Raising Raptors

2 Different kinds of raptors Raptors are birds of prey More than 500 species of raptors around the world Eagles, hawks, falcons, snowy owls and kestrels are all raptors

3 Different kinds of raptors Eagles Hawk

4 Different kinds of raptors Falcon Snowy Owl

5 Different kinds of raptors Kestrel

6 Swoop and find food When they are hungry, they swoop down and kills the prey with their sharp claws.

7 How raptors build their nests Build nests out of reach from predators They build their nest in a tree Or window ledge of a tall building They gather sticks to make their nests

8 Female lays eggs A female raptors lay eggs, hatch with open eyes Some raptors only have few eggs Others may have many

9 The raptor s chicks Raptor chicks grow fuzzy, white feathers It keeps the chicks warm

10 Talons A falcon threatens predators with its sharp talons An owl fluffs out its feathers

11 Fledgling Fledgling: a bird that is learning to fly 1: learn to perch on the edge of its nest 2: hops out onto the tree branch 3: holds onto the branch 4: stretches & flaps its wings 5: steps off the branch

12 On the hunt Falcons An owl Still hunting Falcons Hawking Mantling

13 Footwork A red kite: catch frog, beetles & mice A peregrine falcon: grab birds

14 Footwork A martial eagle: attack young ostriches, chase down antelopes A fish eagle: grab slippery fish

15 Conclusion A raptor is a bird of prey. It hunts and kills other animals for food. There are about 500 species of raptors. Although each is unique, all raptors go through similar types of changes as they progress through their life cycles.

16 The End

17 Lesson 2 Staying alive

18 Different parts of a plant roots: absorb water and minerals from soil, hold the plant in the ground, and store extra food; stems: support the plant and provide a system for water and nutrients to move from the roots to the rest of the plant; leaves: help make food in most plants; flowers: allow most plants to reproduce; fruit: often cover a plant's seeds; and seeds: grow into new plants.

19 Different parts of a plant In some plants, these parts not only help the plant survive but also can be deadly to other plants and animals.

20 Manchineel tree is poisonous Sap: liquid in a plant

21 Poison and protect The Manchineel tree has a dangerous, milky sap in its leaves, bark, and fruit. Animals and people know to stay away. It can harm them. blister: small bag-like swelling

22 Sundew

23 Sundew

24 Trap and kill The sundew are carnivores. They use their leaves to trap and kill prey. Digesting prey gives these predators much needed nutrients.

25 Purple loosestrife

26 Spreading out Purple loosestrife crowds out the roots of other plants.

27 Invade and dominate The purple loosestrife invade new environments, choking out all competition. It digs in deep in wetlands. It also releases millions of seeds each year. Its success comes at the expense of other plants, and the resulting lack of biodiversity affects the habitat for plants and animals alike.

28 Dodder

29 Dodder twists itself around other plants

30 Strangle and steal The dodder is a parasite. Plants like this latch onto a host, penetrate the plant's tissues, and steal nutrients from its system. The parasite doesn't usually kill the host, but it does affect the host's ability to grow and thrive.

31 Conclusion Plants have many different parts. Each part has a specific function that helps the plant survive.

32 The End

33 Lesson 3 Supervolcano

34 Where do you find the supervolcano? Supervolcano hidden under the ground in Yellowstone National Park(U.S.) It is one of the world s largest volcano

35 Parts of the Earth

36 A supervolcano erupts

37 Caldera Calder: a large volcanic crater

38

39 The eruption

40 Hot spring hot springs: Pools of naturally hot water; hot springs are the most common type of hydrothermal feature found in the park.

41 Old Faithful Geyser A geyser is a hot spring too Look like a fountain geysers: hot spring has a constriction in its system, typically near the surface. Pressure builds until a column of water and steam shoots into the air.

42 Plume geyser Plume geyser shoots a spray of water about every 30 minutes

43 Riverside geyser Geyser erupts every 6 or 7 hours

44 Steamboat geyser Steamboat geyser may not erupt for years

45 Mud pots mud pots: When the water supply in a hot spring is limited, a mud pot can form. Microorganisms in these acidic features convert rising gases into sulfuric acid. The acid breaks rock down into clay. As gases escape, the clay bubbles and pops.

46 Fumarole fumaroles: Also known as steam vents, fumaroles are so hot that the tiny bit of water they contain turns into steam before it can reach the surface. Fumaroles are the hottest hydrothermal features in the park.

47 Forest of stone Petrified forest: heat and minerals from melted rock slowly turned the tree into stone

48 The sounds Rumble of geyser Sizzling of hot spring

49 Conclusion Yellowstone National Park sits on top of a supervolcano. Because of this, it is one of the most geologically active areas in the world. When Yellowstone's supervolcano eventually erupts, it will have massive, global effects. Fortunately, scientists say the threat of an eruption is not imminent. In fact, large earthquakes are a more likely hazard in the near future.

50 THE END