1.
According to the audio file, why does the narrator says “... so Dominick and his team is an early bird”?
To demonstrate their diligence can lead to success
To suggest they have to fight against many competitors
To show that Indian life is influenced by common sense
To explain why they pick up latex in the early morning
2.
According to the video, what is the major advantage of adding carbon in the rubber?
To make the tire more durable
To change the color of the tire
To make the tire waterproof
To create the camouflage effect
3.
The early balloons were actually made of dried animal bladders, and not until 1824 did rubber balloons take off. The scientist Michael Faraday invented rubber balloons and applied them in experiments.
In this sentence, what is the meaning of “take off”?
get rid of something useless
too cruel to handle
be able to fly high
suddenly become successful
4.
After the rudimentary form of the tire is completed, it is time to transfer the tread pattern to the surface of the tire. To achieve this goal, the tire needs to be molded and cured.
The word “cured” in this sentence is close in meaning to…
heated
hardened
cooled
healed
5.
Turning latex into rubber requires several procedures, and one of them includes the coagulation of latex. Since waiting for latex to coagulate on its own is time-consuming and inefficient, the workers would add ammonia and formic acid into the milky latex to accelerate the speed of coagulation.
O
X
6.
Latex in its original form is not elastic enough to produce balloons. Some secret chemicals must be added to create bridge-like links between rubber molecules, which enable the latex to be more stretchy.
O
X
7.
Based on the information given by the video, what is true about the smoking process in tire production?
People in the past let latex sheets dry naturally, and smoking is a newly-created method.
After this process, the latex sheets need to be squeezed by rollers again.
One of the advantages of smoking is to prevent the rubber from getting moldy.
The smoking process keeps on going until the latex sheets totally turn black.
8.
After watching the video, Josh decided to make a balloon on his own. However, the balloon he made simply fell apart. Can you help him figure out what the problem might be?
He should have put dye in the latex.
He did not get rid of the bubbles in the latex.
He did not mold the rounded ring at the end.
He forgot to wash the balloon carefully.
9.
After Michael and Josh watched the video of the unit, they found some intriguing facts. Please fill in the correct answers in the blanks.
Michael : Wow, the procedure of making balloons is amazing. Did you realize that balloons need to be _______ after being molded ?
Josh : Yeah, in order to toughen the balloons. I’m also impressed that they will be sent to the _________ to brighten their color.
washed / microwave
baked / laundromat
baked / dryer
washed / fridge
10.
According to the audio file, why does the narrator mention “150 times its original volume”?
To demonstrate the biggest balloon in the world record
To show how pathetic the balloon blower seems to be when it pops
To emphasize the elasticity of the balloon is really important
To imply there’s no need to blow such a big balloon
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