懂你英语Level 3 unit 2

Level 3 unit 1 part1

Listening

Matter is made of atoms and molecules.

Water, for example, is the H2O molecule.

This means that a molecule of water has 3 atoms.

A water molecule has 2 hydrogen atoms and one oxygen atom.

Substances like sugar have many atoms in their molecules.

A molecule of sugar has many atoms, including carbine, hydrogen and

oxygen.

-What is H2O?

The water molecule.

-What is matter made of?

-

Atoms and molecules

Matter is made of molecules such as the H2O which is the water

molecule.

Matter can be in one of 3 states, solid, liquid or gas.

Water and ice are the same substance, but they are in different states.

These states depend on the temperature of the molecules.

When we heat a substance, the molecules move faster and try to take up

more space.

When we cool a substance, the molecules move more slowly.

When we cool a substance to its freezing point, it becomes a solid.

-How many states of matter are there?

-

Three.

-

-What happens when we heat a substance?

the molecules move faster and try to take up more space.

-What happens if we cool a liquid to its freezing point?

It becomes a solid.

In a solid, the molecules move very little.

Their positions are almost fixed.

To be fixed means that their positions dont change.

If we heat the molecules, they move faster and away from each other.

The solid begins to melt, like ice cream on a hot day.

-How can we change a solid into a liquid?

heat it up.

-How can we change a liquid into a solid?

cool it down.

-

At a certain temperature, a solid begins to change into a liquid.

The temperature at which a solid changes into a liquid depends on the

substances.

For water, the solid begins to change into a liquid when its temperature

rises to above 0 degrees Celsius.

For some substances, such as steel, the temperature at which it becomes

a liquid is much higher.

Steel often melts at around 1370 degrees Celsius.

-At what temperature does ice begin to melt?

Above 0 degree Celsius.

-What does the temperature at which a substance begins to melt depend

on?

The substances.

If we continue to heat a liquid, the molecules move even faster.

At a certain temperature, the liquid begins to change into a gas.

For water, the liquid begins to change into a gas at 100 degrees Celsius.

That is the boiling point of water.

-What happens if we continue to heat a liquid?

Molecules move even faster.

Inside a star, such as our sun, the temperature is very high.

Everything inside the sun is a gas.

According to scientists, there are over 65 elements inside the sun.

These include oxygen and iron.

Over 90% of the sun is hydrogen gas.

-How many elements are inside the sun?

More than 65

Yesterday, there was an important science test.

Lisa, Tom and 20 other classmates took the test.

The test is about the states of matter and how they are different.

There were 25 questions on the text and there had 45 minutes to take it.

Here are some of the test result.

2 students got perfect scores.

The lowest score was 68 out of 100.

The average score was 86.3.

11 students score higher than average.

11 students have below the average scores.

Tom missed 2 question on the test so his score was 92.

His score was 8 highest in the class.

Lisa missed 2 and a half question so her score is 90.

Her score is 10 highest score.

Her score is 4 points higher than the average score.

Lisa was disappointed with her test results.

She studied hard for the test but she still didnt do well.

As a result, she plans to study harder for next test.

The next test will be in about 2 weeks.

Tom was surprised and happy with his results.

He didnt study hard so his result was better than he expected.

He was also happy that he did better than Lisa did.

Vocabulary

She is screaming because she is really scared.

Something is chasing her so she is screaming for help.

He is shouting because he is angry.

When hes really angry he often shouts like this.

She is sleeping because shes tired.

Last night she didnt get enough sleep, so today she has no energy.

Shes crying because shes sad.

She got some bad news a few minutes ago.

Shes smiling because shes happy.

Her boyfriend just called and hes returning from a long trip.

Who is smiling because she got some good news?

This man is hiking up a mountain trail.

He is wearing hiking boots and is carrying a pack on his back.

This man enjoys cooking.

He attends a cooking class once a week.

This woman enjoys gardening.

She grows flowers, such as roses, and vegetables, such as tomatoes, in

her garden.

This boy loves playing games.

He likes all kinds of games, including this video games on his computer.

This old couple enjoys travelling.

They take several trips a year, often to different countries

Dialogue

W: Oh, there you are, finally.

M: Yeah, Im sorry.

W: Why are you so late? You were supposed to be here 30 minutes ago.

M: I got on the wrong subway by mistake.

-When was he supposed to be there?

-

-30 minutes ago.

-Why was he late?

He took the wrong subway.

W: Why didnt you call? I was really worried.

M: I dont have my phone. I left it in the office because I was in such a

hurry to get here.

W: OK, well, youre here now. We dont have much time.

M: Yes, well have to hurry. The meeting starts in 15 minutes, right?

W:Yes, its supposed to, if everyone gets here on time.

-When is the meeting supposed to start?

-

in 15 minutes.

-To hurry means..

To go fast.

W: Did you read my presentation?

M: Yes, I do. Its good, but its a bit too long. Im afraid there wont be

enough time for questions.

W: Do you have any suggestions?

M: Yes, I do. I think the company introduction can be cut in half. They

know what we do.

W: OK, I wont show the video. Its about 2 minutes long.

M: Thats a good idea. The video is on our website and is not that good

any way.

-What is she going to cut from her presentation?

the video.

-

-Why is the presentation a bit too long?

-

There isnt enough time for questions.

W: Do you have any suggestions?

M: No, I dont. Im sure youre doing a great job. Are you ready?

W: Yes, Im ready. The meeting room is on the 21st floor.

M: OK, lets go.

-Where is the meeting going to be?

-

in a meeting room.

-

Shes ready to give her presentation at the meeting.

Lisa: How did you do on yesterdays science test?

Tom: I did better than expected. How about you?

Lisa: I didnt do very well. I expected to do better than I did.

Tom: What was your score?

Lisa: I got a 90. What about you?

Tom: I got a 92. I only missed two questions.

-How well did he do on the test?

He did better than expected.

She didnt do as well as she expected.

Lisa: So you did better than I did. And I really study for it too.

Tom: That is a surprise. You usually do better than I do.

Lisa: Yes, I wasnt careful. I made one really stupid mistake.

Tom: What was it?

Lisa: I said 90% of the sun is Helium instead of Hydrogen.

Tom: Wow. That was a stupid mistake.

-Why was he surprised by the result?

He did better than she did.

Tom: What was the average score for the class, do you know?

Lisa: The average score was 86.3 and the lowest was 68.

Tom:Do you know who got the lowest test score?

Lisa: No, I dont. I dont know who got the lowest score.

Tom: Its probably a secret. Did anyone get a perfect score?

Lisa: I think Ada and Sandi both got perfect score.

Tom: Yes, they always do well. I wish I were as smart as they are.

-What was the average test score?

-

-86.3

Level 3 unit 1 part2

Listening

In six weeks Paul is going on a trip.

He is going to Japan and China.

There are a couple of reasons for the trip.

One reason is for business.

He is thinking about starting restaurants in both countries.

The other reason is for pleasure.

He enjoys travelling and hed like to visit some friends.

-Whats going to happen in six weeks?

-

He is going on a trip.

-What is he thinking about starting in both countries?

He is thinking about starting restaurants.

Yesterday he went online and made airline reservations.

There were plenty of seats on the plane, so it was easy.

He also got a good discount.

Unfortunately, he needs a new passport.

His old passport is expiring next week.

This is something he didnt expect.

Getting a new passport will take at least a week.

He needs to apply for one right away.

-Why did he need to get a new passport?

-

His old one is expiring soon.

-What did he need to do right away?

-

apply for a new passport.

-How long will it take to get a new passport?

At least a week.

Paul also needs a visa to enter China.

The last time he went to China was 3 years ago.

3

Getting a visa may also take a week or even two.

So he doesnt have much time.

He needs to hurry.

He cant get the visa until he gets his new passport.

Hell have to go to the Chinese consulate in Toronto.

Hopefully there wont be any delays.

-What may take a week or two?

-

getting a visa.

-When was the last time he went to China?

-

-3 years ago.

Paul has several friends in each country.

One of his best friends lives near Mountain Fuji.

His friend lives near a beautiful lake about 3 hours from Tokyo.

His friend is a great cook and owns a little restaurant.

The restaurant is located on a hill above the lake.

It has a wonderful view and the food is wonderful.

Paul is looking forward to eating there.

Then he will spend the night at his friends house.

-Where is Paul going to stay?

-

Hell stay at his friends house.

-What does his friend do?

-

He owns a restaurant.