国际交流英语视听说第4册unit2

Exploring the Theme
Protecting Our Planet
2. If a plant species becomes extinct, what effect does this have on the environment?
Example Answers
If a plant species becomes extinct, then any insect species or animal that depends on it could go without food and shelter. In addition, plants are important to the soil and the air, so losing a plant species could have several negative effects on the environment.
Example Answers
The bird is sitting on a branch, so it must have lived in places with trees. Southern Florida is also a warm place with a lot of wetlands.
国际交流英语视听说
Book 4
2 Unit
Protecting Our Planet
Exploring the Theme
Protecting Our Planet
1. Lions and other types of big cats are dying at a rapid rate. What do you think is the biggest threat to these animals?
Endangered Species Act (ESA)—1973 Protects animals and their ____h_a_b_i_ta__ts______ Ex.: ____s_t_e_e_lh_e_a__d_t_ro__u_t _in__W__a_s_h_in__g_to_n__s_t_ate Ongoing conflict between _la__n_d_o_w_n_e__rs_ and _g_o_v_e_r_n_m__ent Ex.: ____g_ra_y__w_o__lf_i_n_W__y_o_m__in_g__a_n_d__I_d_a_h_o ESA protects ______l_a_n_d___; ranchers feel law violates ____th_e_i_r_r_ig_h_ts
Example Answers
The biggest threat to big cats is probably hunting. People want their skins, or in some cases, they might think the big cats are a threat to people or to domestic animals. Habitat loss could be another factor that is endangering big cats.
Analytical Listening
Listening 1
2. What do you think are some possible causes for its extinction?
Example Answers
The bird may have become extinct because of habitat loss, environmental pollution, or disease. (It’s a small bird, so people wouldn’t want to hunt it.)
Analytical Listening
Listening 1
A Guided Tour
A | Note-Taking. Listen to the guided tour and complete the notes. Be sure to use key words, abbreviations, and symbols. Notice the indentations.
Exploring the Theme
Protecting Our Planet
1. Which group is the most threatened? Which is the least?
Example Answers Tropical palms have the greatest percentage of species in danger, while lobsters, on the other hand, have the smallest percentage and number of species in danger. Therefore, tropical palms are the most threatened and lobsters are the least threatened.
国际交流英语视听说
Unit 2ຫໍສະໝຸດ BaiduProtecting Our Planet
Analytical Listening
Analytical Listening
Listening 1
1. The dusky seaside sparrow is now extinct. What kind of habitat do you think this bird lived in?
Exploring the Theme
Protecting Our Planet
2. Which categories of species are common in China?
Example Answers All of the categories of species are common in China except for tropical palms, which can be only seen in several provinces. Coral reefs used to be common in the oceans around China, but a majority of the reefs have been destroyed due to over-fishing and pollution.