Vocabulary
crust [krʌst] n. 地壳0 – 35 km
mantle [ˈmæntl:] n. 地幔, 斗篷35 km – 660 km上地幔; 660 km – 2890 km下地幔
core [kɔr, kor] n. 中心, 果核, 地核 2890 km – 5150 km外核; 5150 km – 6360 km内核
upper [ˈʌpɚ] adj. 上面的
lower [ˈloʊə(r)] adj. 下方的
outer [ˈaʊtɚ] adj. 外面的, 外部的 outer core: current loops generate the geomagnetic field
inner [ˈɪnɚ] adj. 内部的
solid [ˈsɑ:lɪd] n. 固体; adj. 固体的; 实心的
fluid [ˈfluɪd] n. 流体; adj. 流体的, 流动的
gas [ɡæs] n. 气体
liquid [ˈlɪkwɪd] n. 液体; adj. 液体的
lithesphere [ˈlɪθəsfɪr] n. 岩石圈 elastic behavior
asthenosphere [æs’θi:nɜ:ˌsfɪr] n. 软流层80 km – 200 km, plastic behavior
earthquake [ˈɜ:rθkweɪk] n. 地震 sudden release of energy in the lithosphere; seismic waves
Grammar
Link to the Textbook
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Music
Link to the Music
National Geographic for Kids
Hippopotamus [ˌhɪpəˈpɑ:təməs] n. 河马
National Geographic for Kids
National Geographic
Hippo | AMAZING ANIMALS
Hippo Licks Croc | National Geographic
How Do Hippos Get Clean?
Hippo Dental Care | The Invaders
TYPE: Mammals
DIET: Herbivores
GROUP NAME: School
HABITAT: Grassland, Freshwater
AVERAGE LIFE SPAN: Up to 40 years
WEIGHT: 1.5 to 4 tons
SPEED: 30 mph
STATUS: Vulnerable
SIZE: Head and body, 9.5 to 14 ft; tail, 13.75 to 19.75 in
Drawing Art
How to Draw a Hippo
