Bài C5 (trang 63 SGK Vật Lý 6): Hãy đọc bảng 20.1 ghi độ tăng thể tích của 1000 cm3 (1 lít) một số chất, khi nhiệt độ của nó tăng thêm 50oC và rút ra nhận xét. Bảng 20.1 Chất khí Chất lỏng Chất rắn Không khí: 183cm3 Rượu: 58cm3 Nhôm: 3,45cm3 Hơi nước: 183cm3 Dầu hỏa: 55cm3 Đồng: 2,55cm3 Khí oxi: 183cm3 Thủy ngân: 9cm3 Sắt: 1,80cm3

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1 Mark letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. A. diverse B. violence C. famine D. crime 2 Mark letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. A. death B. head C. bread D. really 3 Mark letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. A. plumber B. profitable C. bulb D. label 4 Mark letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. A. hydro B. solar C. biogas D. environment 5 Mark letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. A. solar B. hover C. metro D. biogas 6 Mark letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. A. reverse B. helicopter C. vehicle D. recycle 7 Choose the best option A, B, C or D to complete the sentences below. Many children in the slums have died from ----------- and disease. A. education B. pick pocketing C. malnutrition D. entertainment 8 Choose the best option A, B, C or D to complete the sentences below. People put pumpkin ----------- outside the homes during Halloween. A. lights B. lanterns C. neon signs D. bulbs 9 Choose the best option A, B, C or D to complete the sentences below. A hydropower station ----------- in the North of the country next year. A. will be building B. will be built C. was built D. were built 10 Choose the best option A, B, C or D to complete the sentences below. Mai’s dad usually drives her to school ----------- her school is very far from her house. A. but B. or C. though D. because 11 Choose the best option A, B, C or D to complete the sentences below. If people ----------- the rules, there are no more accidents. A. remember B. obey C. follow D. take care of 12 Choose the best option A, B, C or D to complete the sentences below. One of the ----------- of living in the town is the lack of safe places for the children to play. A. disadvantages B. things C. advantages D. benefit 13 Choose the best option A, B, C or D to complete the sentences below. He prefers to go ----------- his car than on the train to avoid gatherings. A. with B. on C. in D. by 14 Choose the best option A, B, C or D to complete the sentences below. How ----------- is Anna going to stay in Hue city? – For five days. A. much B. long C. far D. many 15 Choose the best option A, B, C or D to complete the sentences below. Alternative sources of energy ----------- developed in the near future. A. was B. is C. has been D. will be 16 Choose the best option A, B, C or D to complete the sentences below. When I drove past in my car, I saw him ----------- along the street. A. to walk B. walking C. to walking D. walk 17 Choose the best option A, B, C or D to complete the sentences below. We should put ----------- on our roof for the heating and hot water. A. solar panels B. sun C. equipment D. solar energy 18 Choose the best option A, B, C or D to complete the sentences below. There are ----------- cars in the street at this time because of the social isolation. A. more B. much C. less D. fewer 19 Choose the best option A, B, C or D to complete the sentences below. If we have sky-cycling tubes in the future, the air ----------- better than it is today. A. will be B. won’t be C. isn’t D. is 20 Choose the best option A, B, C or D to complete the sentences below. This morning I couldn’t go to work in time because of ----------- roads. A. solar-powered B. gridlocked C. high-speed D. supersonic