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 rub together to make heat energy. The faster you rub two things together, the more friction (and heat) you can make. Let’s discover friction!

WHAT YOU’LL NEED: ● Soap           ● Water          ● Your hands! WHAT TO DO: 1. Make sure your hands are dry. 2. Rub your hands together until you feel the heat of your hands. 3. Now, use soap and water to get your hands very slippery (滑的). 4. Try to make friction happen while your hands are slippery. 5. 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? 1. Friction happens when you stop your fast running bike. 2. 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 too hot, touch the tires (輪胎) of the car before and after a short drive to see how much warmer they get from friction.

根據(jù)表格內(nèi)容，選擇正確答案。
【小題1】 You’d better make your hands                 to get heat when you rub them.

A．slippery

B．dry

C．wet

D．smooth

【小題2】 What does the word “friction” in this text mean in Chinese?

A．摩擦

B．冷卻

C．膨脹

D．震動

【小題3】                        is NOT an example of friction.

A．Bike riding

B．Car driving

C．Hands rubbing

D．Friction discovering

【小題4】 What’s the last column (欄目)?

A．THINK IT OVER!	B．WHAT HAPPENED?
C．EVERYDAY ACTION:	D．WORK WITH PARENTS!

【小題5】This text is most probably                         .

A．a(chǎn) science report	B．a(chǎn) car advertisement
C．a(chǎn) rubbing introduction	D．a(chǎn) chemistry programme

Have successful people ever felt sad? Do they have any “secrets” to success? The answers to these questions can be found in US president Barack Obama’s “back to school” speech. Here is an excerpt(摘錄) from his speech.
I know that sometimes, you get the sense that you can be rich and successful without any hard work—that your ticket to success is through rapping (饒舌音樂) or basketball or being a TV star, when chances are, you’re not going to be any of those things.
But the truth is, being successful is hard. You won’t love every subject you study. Not all the homework will seem completely important to your life right this minute. And you may not succeed at everything the first time you try.
That’s OK. Some of the most successful people in the world are the ones who’ve had the most failures. JK Rowling’s first Harry Potter book was turned down 12 times before it finally came out. Michael Jordan was cut from his high school basketball team, and he lost hundreds of games and missed thousands of shots (投籃) during his career. But he once said, “I have failed over and over and over again in my life. And that is why I succeed.”
These people succeeded because they understand that you can’t let your failures beat you—you have to let them teach you. You have to let them show you what to do differently next time.
No one’s born being good at things. You become good at things through hard work.
Don’t be afraid to ask questions. Don’t be afraid to ask for help when you need it. I do that every day. Asking for help isn’t a sign of weakness; it’s a sign of strength. It shows you have the courage to admit(承認(rèn)) when you don’t know something, and to learn something new.
And even when you’re struggling, even when you’re discouraged (泄氣), and you feel like other people have given up on you—don’t ever give up on yourself. Because when you give up on yourself, you give up on your country.
【小題1】Why does Barack Obama mention (提到) JK Rowling and Michael Jordan in the fourth paragraph?

A．To compare these two famous persons.

B．To explain that writing and sports are difficult skills.

C．To show that the two persons were treated unfairly.

D．To prove that failure is the mother of success.

【小題2】Which of the following statements is NOT true?

A．No one can be successful without working hard.

B．Failure can be good if you treat it in a right way.

C．Those who believe in themselves shouldn’t ask others for help.

D．One should try his best to make his dream come true.

【小題3】Which of the following is the closest in meaning to the underlined sentence?

A．One should change his mind when others give honest advice to him.

B．One should believe in himself no matter what difficulty he is faced with.

C．One doesn’t have to work hard when he has failed several times.

D．One doesn’t have to take others’ advice when they get away from him.

Have successful people ever felt sad? Do they have any “secrets” to success? The answers to these questions can be found in US president Barack Obama’s “back to school” speech. Here is an excerpt(摘錄) from his speech.
I know that sometimes, you get the sense that you can be rich and successful without any hard work—that your ticket to success is through rapping (饒舌音樂) or basketball or being a TV star, when chances are, you’re not going to be any of those things.
But the truth is, being successful is hard. You won’t love every subject you study. Not all the homework will seem completely important to your life right this minute. And you may not succeed at everything the first time you try.
That’s OK. Some of the most successful people in the world are the ones who’ve had the most failures. JK Rowling’s first Harry Potter book was turned down 12 times before it finally came out. Michael Jordan was cut from his high school basketball team, and he lost hundreds of games and missed thousands of shots (投籃) during his career. But he once said, “I have failed over and over and over again in my life. And that is why I succeed.”
These people succeeded because they understand that you can’t let your failures beat you—you have to let them teach you. You have to let them show you what to do differently next time.
No one’s born being good at things. You become good at things through hard work.
Don’t be afraid to ask questions. Don’t be afraid to ask for help when you need it. I do that every day. Asking for help isn’t a sign of weakness; it’s a sign of strength. It shows you have the courage to admit(承認(rèn)) when you don’t know something, and to learn something new.
And even when you’re struggling, even when you’re discouraged (泄氣), and you feel like other people have given up on you—don’t ever give up on yourself. Because when you give up on yourself, you give up on your country.
【小題1】Why does Barack Obama mention (提到) JK Rowling and Michael Jordan in the fourth paragraph?

A．To compare these two famous persons.

B．To explain that writing and sports are difficult skills.

C．To show that the two persons were treated unfairly.

D．To prove that failure is the mother of success.

【小題2】 Which of the following statements is NOT true?

A．No one can be successful without working hard.

B．Failure can be good if you treat it in a right way.

C．Those who believe in themselves shouldn’t ask others for help.

D．One should try his best to make his dream come true.

【小題3】 Which of the following is the closest in meaning to the underlined sentence?

A．One should change his mind when others give honest advice to him.

B．One should believe in himself no matter what difficulty he is faced with.

C．One doesn’t have to work hard when he has failed several times.

D．One doesn’t have to take others’ advice when they get away from him.

Have successful people ever felt sad? Do they have any “secrets” to success? The answers to these questions can be found in US president Barack Obama’s “back to school” speech. Here is an excerpt(摘錄) from his speech.
I know that sometimes, you get the sense that you can be rich and successful without any hard work—that your ticket to success is through rapping (饒舌音樂) or basketball or being a TV star, when chances are, you’re not going to be any of those things.
But the truth is, being successful is hard. You won’t love every subject you study. Not all the homework will seem completely important to your life right this minute. And you may not succeed at everything the first time you try.
That’s OK. Some of the most successful people in the world are the ones who’ve had the most failures. JK Rowling’s first Harry Potter book was turned down 12 times before it finally came out. Michael Jordan was cut from his high school basketball team, and he lost hundreds of games and missed thousands of shots (投籃) during his career. But he once said, “I have failed over and over and over again in my life. And that is why I succeed.”
These people succeeded because they understand that you can’t let your failures beat you—you have to let them teach you. You have to let them show you what to do differently next time.
No one’s born being good at things. You become good at things through hard work.
Don’t be afraid to ask questions. Don’t be afraid to ask for help when you need it. I do that every day. Asking for help isn’t a sign of weakness; it’s a sign of strength. It shows you have the courage to admit(承認(rèn)) when you don’t know something, and to learn something new.
And even when you’re struggling, even when you’re discouraged (泄氣), and you feel like other people have given up on you—don’t ever give up on yourself. Because when you give up on yourself, you give up on your country.
【小題1】Why does Barack Obama mention (提到) JK Rowling and Michael Jordan in the fourth paragraph?

A．To compare these two famous persons.

B．To explain that writing and sports are difficult skills.

C．To show that the two persons were treated unfairly.

D．To prove that failure is the mother of success.

【小題2】Which of the following statements is NOT true?

A．No one can be successful without working hard.

B．Failure can be good if you treat it in a right way.

C．Those who believe in themselves shouldn’t ask others for help.

D．One should try his best to make his dream come true.

【小題3】Which of the following is the closest in meaning to the underlined sentence?

A．One should change his mind when others give honest advice to him.

B．One should believe in himself no matter what difficulty he is faced with.

C．One doesn’t have to work hard when he has failed several times.

D．One doesn’t have to take others’ advice when they get away from him.

A habit is any action that we have performed so often that it becomes something that we do almost without thinking. Some of them are thought to be bad habits. People spend countless hours and dollars each year trying to get rid of these bad habits but often fail. Why? Change is hard work and there is no shortcut to achieve it. However, there is still some advice for you to follow.
First, look at why you do it. In other words, what’s the result of doing this thing? If your bad habit is shouting at people when you are unhappy or under pressure, what do you get from it? It may make you feel a little better for the moment. Or maybe you have a bad habit of leaving your homework undone. The result could be that you get more time to spend on the Internet!
Next, take a look on the other hand. What are you losing because of your habit? Shouting at other people is a bad habit because it makes people around you feel bad and unhappy. Leaving your homework undone is a bad habit because you may be punished by your teacher. Having more Internet time means that you are losing the chance to learn the things that you need to learn. When you think that way, you’ll find that it’s not wise to keep your bad habit! Now it is time to make a decision. What will you choose? I’m sure you will choose to do what you think is more important.
【小題1】From the first paragraph we know that __________.

A．a(chǎn) habit is a terrible thing that we can never change

B．people take countless hours and dollars to get rid of habits

C．none of the people who try to break bad habits are successful

D．though it is difficult, we can still do something about our bad habits

【小題2】The underlined sentence “there is no shortcut to achieve it” means that ____.

A．it is not easy to get rid of bad habits

B．there is a long way and a short way

C．something dangerous may happen

D．we must cut it in a short time.

【小題3】Which does NOT happen because of a bad habit according to the reading?

A．You are punished later.

B．Making people around you feel unhappy.

C．You feel a little better after shouting at others.

D．You leave your homework at home by accident.

【小題4】The main purpose of this passage is to __________.

A．introduce and describe	B．complain and disagree
C．explain and advise	D．discuss and argue