ใบงานบทที่ 3
Worksheet of Unit 3: Crystal
3A:Crystal Palace
Vocabulary
Complete the sentences below using the correct words from the box. Type the letters a-h.
/ across / / temperature / / enough
1. When……… are bad, it can be difficult for smokejumpers to land safely.
2. I walked……………….. the bridge to get to the forest.
3. Many endangered species need ……………. from humans.
4. Firefighters……………… special clothes to protect themselves.
5. Can I borrow some money? I don't have…………….. to buy lunch.
6. It is really cold today. What's the ……………… ?
7. As there are no roads or paths, the mountains do not get many ……………………. .
8. I need to…………………….. for my presentation on Friday.
Language
Complete the sentences below with the correct second half. Type the letters a-d.
/ it felt as though the plane would break at any minute / / as though they could fly/ it was as though we had walked for days and days / / it feels as though I'm melting
1. Following the tracks up the mountain, …………………………..……………….. .
2. Flying into the hurricane, …………………………………………………..……………. .
3. Smokejumpers jumped from the planes ……………………………………………. .
4. The temperature is so hot; …………………………………………….………………….. .
Reading
Look at Unit 3A in Reading Adventures and answer these questions.
1. What is the temperature like in the Cave of Crystals?
a. hotter than the Sahara Desert
b. very warm
c. very cold
2. Which of these statements about the clothing you wear in the cave is correct?
a. You can wear your everyday clothes.
b. You need to wear the same kind of clothing you would wear in the desert.
c. You need to wear protective clothing.
3. What does the visitor's mask do?
a. It keeps the heat away from the ice.
b. It blows air to keep the visitor cool.
c. It helps visitors see the crystals better.
4. How long do visitors usually stay inside the Cave of Crystals?
a. Less than 20 minutes
b. More than 20 minutes
c. The reading passage doesn't say.
5. Why does one visitor say that being in the cave is like "standing inside a star"?
a. Because the cave is amazing and beautiful.
b. Because visitors have to wear special clothes, similar to a space suit.
c. Because conditions in the cave are so hot.
3B: Crystal Skull
Vocabulary
Complete the sentences below using the correct words from the box. Type the letters a-h.
/ certain / / evidence / / debated
1. When you are too tired, you lose your …………………. to drive safely.
2. Using the latest ……………… , we can predict when hurricanes will come.
3. All of the……………………. shows that the fire was not an accident.
4. I am…………………. that the answer to this question is incorrect.
5. You never tell the truth. I can’t ………………………………. a word you say.
6. Scientists have………………………. for a long time the reasons why dinosaurs no longer exist.
7. Tokyo is one of the most………………………….. cities in the world.
8. The Internet can be a good…………………………………. of information.
Language
Are the following sentences Correct or Not correct?
A. Correct B. Not correct
1. I have been to New Guinea two years ago.
2. The firefighters have cut down many dead trees today.
3. This city has been hit with some bad hurricanes in the past few years.
4. Have you ever went to the Cave of Crystals?
5. I've never seen a crystal skull, but I'd like to.
Reading
Look at Unit 3B in Reading Adventures and answer these questions.
1. Who made the crystal skulls?
a. the Mesoamerican people
b. scientists
c. nobody really knows
2. When do scientists believe the skulls were made?
a. thousands of years ago
b. in the 19th century
c. around A.D. 1600
3. The marks on the skulls mean that the skulls ______.
a. were possibly made by aliens
b. are more modern than some people believed
c. can help people feel better
4. Which of the following sentences about archeologists at the British Museum is NOT true?
a. They have found many Mesoamerican objects.
b. They have found several crystal skulls.
c. They do excavations in Central America.
5. Which of the following sentences is correct?
a. The debate over where the crystal skulls are from is not finished.
b. Most scientists are uncertain whether that the crystal skulls are Mesoamerican or not.
c. Mesoamerican people had modern technology.
3C:Video Activities
Video Questions
Watch the video and answer the following questions:
1. Under what conditions do crystals form?
a. when dfferent kinds of rocks are pushed together
b. when rocks are cold
c. when rocks melt then cool
2. How many unit cells are needed for a salt crystal to form?
a. one unit cell b. two unit cells c. many unit cells
3. Which of the following sentences is NOT true?
a. People believe that crystals can protect them.
b. People believe that crystals are interesting, but not very useful.
c. People believe crystals are nice to look at.
4. We can tell which family a crystal belongs to by its ______.
a. shape b. size c. color
5. Crystals that form in nature ______.
a. belong to one of seven unique crystal systems b. usually follow their crystal pattern exactlyc. usually contain sodium and chlorine
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