Activity Book Answer Key
PA = Possible answers
Unit 1 p. 6, act. 2 a 1 in person, 2 by telephone b because there are contextual clues p. 6, act. 3 a asking him a question b telling him about a soccer game p. 6, act. 4 H, B, B, H p. 7, act. 7 1, 2, 3, 6, 5, 4 p. 8, act. 1 PA: a a mall c shopping p. 8, act. 2 going, have, doing, come, burger, see p. 9, act. 3 PA: Start a conversation: Hello, Hi, How are you?,What are you doing? End a conversation: Bye, See you now/there/later. p. 9, act. 5 2, 1, 1, 2, 1 p. 9, act. 6 left chart: unfriendly; right chart: friendly p. 10, act. 2 left chart: accept; right chart: reject p. 10, act. 5 PA: I’m worried because I cannot learn the choreography. / That’s not a big problem, I will help you! p. 12, act. 1 PA: are you, What, like, afraid, join See p. 12, act. 2 2, 3, 1, 4 Unit 2 p. 16, act. 2 past tense p. 16, act. 3 d, c, a, b p. 17, act. 4 a and b circled p. 17, act. 5 2, 3, 1 p. 18, act. 2 It’s a funny anecdote. / Grandma, kid, Pepper p. 18, act. 3 describe things p. 18, act. 4 Pepper and I were running. / The sun disappeared. p. 20, act. 2 Eugenia’s dad, Eugenia, and the girl who speaks Unit 3 p. 26, act. 1 PA: A technical website or a textbook p. 28, act. 1 1 A water filter 2 clean water 3 different materials filter water, sand with big grains, and small grains. p. 28, act. 2 1, 6, 3, 5, 2, 7, 4, 8 p. 28, act. 3 First, cut a big plastic bottle in half. Then, make a small hole in the lid. Next, put a coffee filter over the opening of the bottle and replace the lid. After that, put the top half of the bottle upside down in the bottle half.Then, fill the bottom quarter of the top part of the bottle with fine sand. Next, fill the next quarter of the bottle with coarser sand. Next, add small rocks to the third quarter of the bottle. Finally, you can now add dirty water to the bottom and wait for clean water to come out at the bottom. p. 29, act. 4 3 p. 29, act. 5 5-10 min p. 26, act. 2 b an engineer p. 26, act. 3 g, b, e, a, f, c, d p. 26, act. 4 Yes, they do.
p. 29, act. 6 Answers may vary. p. 30, act. 1 a
p. 30, act. 2 A, A, P, A, A, P p. 30, act. 3 4, 3, 1, 6, 2, 5
p. 31, act. 6 b Should I keep the plastic bag in the sun? c Can I plant a sunflower in a pot? d Do I need to water the sunflowers if it rains? p. 31, act. 7 don’t need to / don’t have to / can- should-need p. 32, act. 1 PA: Because many types of energies pollute, and we will eventually run out of certain fuels. p. 32, act. 2 wind / to lift p. 32, act. 4 PA: 3 Tape pencil to table with card. 1/2 pencil go over table. 4 Tie string around pencil, table–blade. 5 Tape string to cup.Tape and tie more string. 6 Use fan to make blades move–cup lift. p. 33, act 6 PA: Can be presented as a flow chart, steps with icons, or separate illustrations and steps: First cut four strips of card.Then make blades out of two strips of card and tape.The pencil should fit tightly between the cards. Next, tape the pencil to a table using two strips of card. Half of the pencil should stick out from over the table. After that, tie string around the pencil, between the table and the blade.Then tape the other end of the string to the cup. Tape and tie more string for the cup to stand up. Finally, you can use a fan to make the blades move to lift the cup. p. 35, act. 1 1, 4, 6, 3, 2, 5, 7 Unit 4 p. 36, act. 6 All questions are affirmative. p. 37, act. 7 Who, What, Where, Details p. 38, act. 2 a how dogs feel towards humans b scientists at a university in Atlanta c the smell of their owner and when their owner speaks in a “good dog” voice d monkeys p. 38, act. 3 They – experts, them – to dogs, they – dogs, us – humans, it – dogs’ p. 38, act. 4 Present perfect for recent events p. 38, act. 5 a humans b pets, animals c experts p. 39, act. 8 a dogs and people b making sure dogs are treated well c when owners don’t take care of their dogs d so that dogs and owners can be happy e to talk about other animals p. 36, act. 4 d, c, a, e, b p. 36, act. 5 d, e, a, b, c p. 40, act. 1 c circled p. 40, act. 2 G, B, B, G, B p. 42, act. 3 a It is about The Center of Human Technology. b February c Experts studied children. d Technology can cause headaches, sore eyes, neck and back pain, and sleeping problems.
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