Title ĐÁP ÁN ĐỀ THI HSG ANH 8 BÌNH XUYÊN - VĨNH PHÚC 2020-2021.docx ✅

1 PHÒNG GIÁO DỤC VÀ ĐÀO TẠO ĐỀ CHÍNH THỨC GIAO LƯU HỌC SINH GIỎI NĂM HỌC 2020-2021 MÔN: TIẾNG ANH 8 Thời gian làm bài: 150 phút (Không kể thời gian giao đề) (Đề thi có 09 trang) A. LISTENING SECTION 1 Questions 1-5. Listen to the dialogue then choose the best answer A, B or C for each question. 1. Thermal pollution means ____________. A. water always gets hotter B. water always gets colder C. there is a change in the water temperature 2. Power stations use water to ____________. A. cool their equipment B. heat their equipment C. dump into nearby lakes 3. Warmer water has ____________. A. more oxygen B. less oxygen C. the most oxygen 4. Algal blooms can change ____________. A. the color of water B. the amount of oxygen C. the temperature 5. What do they do to cool down the water from power stations? A. discharge cold water into river B. build cooling towers C. keep hot water in reservoirs TRANSCRIPT Reporter: Does thermal pollution mean that bodies of water get hotter, Mr Nam? Mr Nam: Not always. Sometimes the water becomes colder, and that’s also thermal pollution. In general, thermal pollution means a change in the water temperature. Reporter: That’s interesting! What causes it? Mr Nam: Power stations are one factor. They use water in the nearby lakes or rivers to cool their equipment, which heats up the water. Then they dump the hot water back into its source. Reporter: Are there any other causes? Mr Nam: Yes. Thermal pollution may also happen due to the discharge of cold water from reservoirs into warm rivers. Reporter: Thermal pollution can have dramatic effects. Right? Mr Nam: Certainly. Most aquatic creatures need a certain temperature to survive. Warmer water has less oxygen in it, and this can harm fish populations. Besides, warmer water can cause harmful algal blooms. This can change the colour of the water like in the first picture and, more seriously, the algae poisons the