北师大版（2019） 选择性必修第一册 Unit 3 Conservation Lesson 1 the sixth extinction 课件(18张ppt)

(共18张PPT)
Unit 3 Conversation
Lesson 1
learning vocabulary
die out 消失；绝迹，灭绝 ---become extinct ---disappear
--Dinosaurs mysteriously disappeared around 65 million years ago.
die (dying –died- dead)
die off 相继死去 die from/of 死于 前者疾病，饥饿等内部原因，后者外部原因，如交通事故
die down 逐渐变弱，逐渐平息 die away 逐渐减弱，逐渐消失
be dying to do sth 渴望做某事 be dying for sth 渴望某事
Species [ spi i z] n 物种
Pandas are an endangered species.
Species diversity 物种多样性
wipe [wa p] vt. 擦；拭
--Wipe the table
--Gleb wiped the sweat from his face.
wipe out 彻底毁灭
--This disease tends to wipe out the entire population.
unusual [ n ju u l] adj 异常的，不平常的 uncommon/ rare
amazing and unusual weather phenomenon (phenomenona)
mass [m s] n.大量
a mass of / masses of 大量，后跟可名复和不可名
mass adj. 大批的，广泛的，数量极多的
mass production 批量生产
mass media 大众媒体
--Mass media has a close relationship with teenagers.
masses 群众
Massive adj. 巨大的
varied [ ve rid] adj. 各种各样的，形形色色的
vary [ ve ri] v. 使…变化,改变
variety [v ra ti] n. 变化，种类
various [ ve ri s] adj.各种各样的
--It is important that your diet is varied and balanced.
asteroid [ st r d] n. 小行星
--What happens if an asteroid hits the earth
decrease [ di kri s，d kri s ] n. 减少；减少的量 vi & vt 减少
decrease by /to 减少了/到
increase [ kri s ， n kri s ] n. 增加 vi & vt 增加
incease by / to 增加了/到
increasing [ n kri s ] adj. 越来越多的 increasingly adv. 渐增地
blame [ble m] vt 责怪，指责
blame sb/sth (for sth)
blame sth on sb/sth
be to blame (for sth) 把……归咎于
blame n. 指责，责备
lay / put the blame （for sth） on …
把（某事的）责任归咎于…
---He is blamed for the big mistake, but he blamed it on others. In fact, it is he, not others, that is to be blame for it.
affect [ fekt] vt 影响
effect [ fekt]=impact n. 影响
influence n. vt 影响
have an effect on 对…有影响
have a positive/negative effect on
对…有积极/消极影响
have an influence on 对…有影响
be at risk 处于危险，受到威胁
risk [r sk] n. 危险，风险
at the risk of doing sth 冒着做某事的风险
run/ take the risk of 冒…的风险
risk vt. 冒…的风险，冒险
risk doing sth
risk one’s life to do sth 冒着某人的生命危险做某事
risky adj. 有危险的
endangered [ n de nd d] adj 濒危的
danger n 危险
in danger out of danger
dangerous adj. 危险的
endanger vt. 使处于险境
Solar [ s l (r)] adj 太阳（光）能的
Solar energy/ power 太阳能
Solar system 太阳系
hatch [h t ] vi & vt (使)孵化; 密谋
--The hen must find a warm place to hatch her eggs.
restore [r st (r)] vt. （使）恢复;修复;归还
restore confidence 恢复信心
---The building has been lovingly restored.
---The police have now restored the painting to its owner.