Have you ever rubbed your hands together when they get cold? Why do we do that? We do that for friction. Friction happens when two things that aren’t very smooth (光滑的) rub together to make heat energy. The faster you rub two things together, the more friction you can make. Let’s discover friction!
WHAT YOU’LL NEED:
★Soap ★Water ★Your hands
WHAT TO DO:
★Make sure your hands are dry.
★Rub your hands together until you feel the heat of your hands.
★Now, use soap and water to get your hands very slippery (滑的).
★Try to make friction happen while your hands are slippery.
★Please write down what has happened.
LET’S TALK!
Friction is an energy that happens when two things rub together. When friction happens, it makes heat! When your hands are slippery, they won’t make very much friction and your hands won’t get so hot.
DID YOU KNOW?
★Friction happens when you stop your fast running bike.
★Ancient people made fires by rubbing two pieces of wood together. Friction happened though they didn’t know it. ___ __? Friction is everywhere. Have you ever noticed situations where friction is happening? If not, ask your parents to take you out in a car. If it is not hot, touch the tires (轮胎) of the car before and after a short drive to see how much warmer they get from friction.
1.You’d better make your hands ______ to get heat when you rub them.
A. slipperyB. dryC. wet
2.The word “friction” in the first paragraph means “______”.
A. 摩擦B. 震动C. 膨胀
3.We can know from the passage that it’s a ______ experiment.
A. physicsB. chemistryC. biology
4.The topic of the last column (栏目) is ______
A. THINK IT OVER!B. WHAT HAPPENED?C. WORK WITH PARENTS.
5.The main idea of the passage is ______.
A. how to discover frictionB. how to rub your handsC. how to make fires by rubbing
Take a look at the following information. Some may be useful for you!
1.______ can get the job of the babysitter.
A. A 45-year-old
woman who likes playing with kids
B. A 20-year-old girl who is good at English and busy on weekends
C. A 20-year-old English major who likes kids and is free on weekends
2.You should ______ before you take the medicine.
A. shake the bottle B. keep the bottle coolC. wash the bottle
3.Please put the medicine ______ after you take it.
A. in a cold placeB. in a warm place C. in a bag
4.If you and your parents want to see the movie on Tuesday, you should pay ______.
A. ¥ 40 B. ¥ 120 C. ¥ 60
5.The correct order of using the payphone should be ______.
a. insert your coins b. dial the number c. lift the receiver
A. a-b-c B. c-a-b C. c-b-a
Having Fun “Growing” and “Stealing”
Recently, an Internet game has become a new fashion among young office workers and students. People can “farm” on a piece of “land” and “grow”, “sell” or even “steal” “vegetables”, “flowers” and “fruits” on the internet.
They can earn some e-money and buy more “seeds”, “pets” and even “houses”.
Joyce interviewed some young people. Here are their opinions.
Harold：I don't quite understand why they are so mad about the childish game, maybe they are just not confident enough to face the real world.
Allan：I enjoy putting some “bugs” (臭虫) in my friends’ gardens and we’ve become closer because of the game. Having fun together is the most exciting thing about it．
Laura：You know, people in the city wish for the life in the countryside. It relaxes my work pressure; besides, it gives me the exciting experience of being a “thief”.
Ivy： Well. It’s just a waste of time. Teenagers playing the game spend so many hours on it that they can not concentrate on their study.
1.According to the passage, people can’t ______ things in this game.
A．growB. borrowC. steal
2.Among the people Joyce interviewed, ______ likes the game while ______ dislikes the game.
A. Laura, Allan B. Allan，Harold C. Ivy, Harold
3.From Laura’s words, we can infer (推理) that she’s most probably ______.
A. a student B. an office worker C. a thief
4.You can find the passage ______.
A. in a science magazine B．in an advertisement C．in a newspaper
5.Which of the following statements is TRUE according to the passage?
A. People in the city want to enjoy the country life.
B. People can earn some money and buy more seeds.
C. People are confident enough to face the real world.
Long long ago, an elephant and a monkey lived in the same forest. They were good friends, but both of them were very proud. The elephant thought of himself strong, and the monkey felt himself quick.
One day they went to ask the old bird, “Can you tell us which one of us is more important?” The old bird didn't give them the answer at once. However, he asked them to get some bananas on the other side of the river and bring them to him.
So the elephant and the monkey went to the river, but the water ran so fast that the monkey was afraid.
“Get on my back, Monkey,” said the elephant, “I shall take you there. I'm big and strong, and I can swim across the river.”
Soon they got to the other side. The elephant tried to reach the bananas, but they were too high. “Wait a minute, please. I can climb,” said the monkey. He quickly ran up the tree and gave the bananas to the elephant.
Then they came back happily to the old bird and showed him the bananas. “Now, you see, the elephant is strong,” said the old bird with a smile, “but he couldn't get the bananas; the monkey is quick, but he couldn't, either. Only you two could do the work well when you helped each other.”
1.Both the elephant and the monkey are ______ in the story.
A. quickB. proud C. strong
2.According to the story, ______ is more important.
A. the monkey B. the elephant C. neither
3.Picture ______ shows the right position of the banana tree.
A. B. C.
4.They should ______ to get the bananas.
A. first swim across the river and then come back
B. first climb up the tree and then swim across the river
C. first swim across the river and then climb up the tree
5.The best title for the story is “______”.
A. Teamwork is important B. An elephant and a monkeyC. Strong or quick
Once a man came to a smart man’s house and said, “I have many bad habits. Which one of them should I give up ?” The wise man said, “Never tell lies (谎言) and always speak the truth.” The man promised (承诺) to do and went home.
At night the man was about to go out to steal (偷). Before leaving, he for a moment about the promise he made to the wise man. “If he asks me where I have been, what shall I say? Shall I say I stealing? No, I cannot say that. But nor can I lie. If I tell the truth, everyone will start me and call me a thief. I would be punished for stealing.” So the man made a decision not to steal that night, and gave up this bad habit.
Next day, he wanted to drink wine. When he was about to do so, he said to himself, “What shall I say to the wise man if he asks me I did during the day? I cannot tell a lie.” And so he gave up the of drinking wine.
, whenever the man thought of doing something bad, he remembered his promise to tell the truth at all times. One by one, he gave up all his bad habits and became a very person.
Telling the truth is a very good habit. If you always speak the truth, you can save yourself from a lot of and become a person whom everyone likes and favors.
Make a promise: I shall always speak the truth.
1.A. first B. next C. then
2.A. that B. it C. so
3.A. played B. sleptC. thought
4.A. hung outB. went out C. handed out
5.A. hatingB. watchingC. fooling
6.A. what B. whereC. how
7.A. use B. word C. idea
8.A. On the wayB. In this wayC. By the way
9.A. rich B. strong C. good
10.A. pleasureB. troubleC. hopes
– Shall we go and have a picnic at the weekend?
– _____ The weather report says there might be a cold front by then.
A. Why not?B. No, let’s not.C. It depends.
