Tornadoes form when strong winds spin. Wind is invisible, but we can see tornadoes because the spinning wind picks up water, dust, and debris. The spinning wind forms a funnel that connects thunderstorm clouds with the ground.
When a tornado is close, watch out. They can spin over 200 miles per hour and cause a lot of damage. As they move across the land, they can easily pick up cars, trucks, and even houses, and then throw them very far. It is important to find a safe place to take shelter if a tornado gets close.
A safe place could be a basement or the lowest floor, depending on where you are. If you are in a home without a basement, try to find a first-floor closet or bathroom without windows in the middle of your house. You should curl up into a ball and cover your head and neck with your hands. Stay in a safe place until the tornado passes.
But there are some people who actually want to get close to tornadoes. They are scientists who want to learn more about tornadoes. One of the best ways to do this is to get as close as possible to these twisters. They use special equipment and instruments to measure what is happening in and around a tornado.
One special instrument these scientists use is called a tornado probe. It is about six inches tall and looks like a short, orange construction cone. Inside the tornado probe, there are sensors to measure wind speed, temperature, pressure, and direction. Some probes even have cameras, so the scientists can see and understand what it’s like to be in a tornado.
To be able to get these measurements, the scientists have to get a tornado probe near or into a tornado. Scientists will try to guess where a tornado will go next. Then they drive to that location and put down the probe. If they do not guess correctly, they pick up their probe and try another spot. If they are right, the tornado will go near or even right over the probe. Then they take all of the measurements from the probe and use them to predict where future tornadoes may form and travel.
Tornadoes are extremely dangerous, and the scientists who study them up-close are bold and brave. Their work is very important and has saved lives by giving people some warning to get out of the way of a destructive tornado.
predict pre · dict
- to say ahead of time that something will happen.
The general predicted an easy victory. They predicted that it would rain today.
- to see or proclaim in advance (a future unplanned event); prophesy; foretell.
Can anyone really predict the future?
In the famous opera, the gypsy, Carmen, predicts her own death.
- to announce the coming of (a future event) based on particular evidence or inference.
His mother had predicted that his marriage would not last, and, unfortunately, she was correct.
No one can predict when these political prisoners will be released.
The statistical model predicts that one in ten people will contract the disease.
The weather report predicted snow for this afternoon.
- to foretell events.
predecir: The Spanish word predecir means predict.
There are some examples of how the word or forms of the word are used:
- Experts predict a shortage of 40,000 doctors by 2020 and 260,000 nurses by 2025.
- Some people think that Brazil’s government is not doing enough to stop deforestation. Ranchers and farmers think it is unfair for others to tell them that they can’t use the rain forest for their own livelihood. Scientists predict that if deforestation continues at its current rate, the rain forest may survive only another 40 to 50 years.
- “The tomatoes sure need a lot of attention!” Luke exclaimed one late afternoon. He had been double and triple tying the vines, because the weather forecaster had predicted wind and rain for that night.
- Since the disaster, the world has reached out to help people rebuild their lives. Officials predict that it could take up to 10 years to help the region recover from the tsunami.
sensor sen · sor
- anything that is capable of registering physical quantities, as of light or temperature, and sending signals that indicate the level of the stimulus.
sensor: The Spanish word sensor means sensor.
There are some examples of how the word or forms of the word are used:
- At first, a faulty fuel sensor postponed the liftoff for several days.
- Movers wanted to make sure that no additional harm was done to the bell’s famous During the move, scientists attached tiny sensors to the mostly copper bell. The sensors would sound an alarm if the bell’s famous crack got bigger.
- When you smell something, “it’s basically like taking an interstate highway” from the nose to the limbic system, explains Wysocki. Sensory information from the eyes and ears, on the other hand, must travel farther to reach the limbic system-“like taking county roads.”
- Live from Australia, it’s the Great Barrier Reef! Scientists are using special sensors, known as digital skins, to monitor changes in this underwater treasure.
- The second part of the so-called black box is the flight data recorder, or FDR. This piece of equipment does not record the people onboard, but all technical aspects of a flight. Sensors all over the plane detect and send information to a flight data acquisition unit which, in turn, is hooked up to the FDR.
1. What is a tornado?
A. a sensor that measures wind speed, temperature, pressure, and direction
B. a first-floor room without windows in the middle of a house
C. a person who studies winds and shares his or her findings with others
D. spinning wind that forms a funnel and can cause a lot of damage
2. What sequence of events is described in the passage?
A. the steps scientists take to get measurements from tornado probes
B. the steps involved in the formation of a tornado
C. the steps people take to build tornado probes
D. the steps people should take if their house is destroyed by a tornado
3. Tornadoes are dangerous.
What evidence from the passage supports this statement?
A. Some scientists use special equipment and instruments to measure what is happening in and around a tornado.
B. As tornadoes move across the land, they can easily pick up cars, trucks, and even houses, and then throw them very far.
C. If scientists do not guess correctly where a tornado will go, then they pick up their tornado probe and try another spot.
D. Tornado probes are about six inches tall and look like short, orange construction cones.
4. What can information about one tornado tell scientists?
A. Information about one tornado can tell scientists how old a tornado probe is.
B. Information about one tornado can tell scientists where another tornado may happen.
C. Information about one tornado can tell scientists how many people took shelter from it in their basement.
D. Information about one tornado can tell scientists whether closets or bathrooms are better for taking shelter in.
5. What is this passage mainly about?
A. wind speed, temperature, pressure, and direction
B. cars, trucks, and houses that have been picked up by tornadoes
C. tornadoes and people who study them
D. the formation of a tornado’s funnel
6. Read the following sentences: “Inside the tornado probe, there are sensors to measure wind speed, temperature, pressure, and direction. Some probes even have cameras, so the scientists can see and understand what it’s like to be in a tornado.”
What does the word probe mean?
A. something that gathers information
B. a strong wind that spins in a funnel
C. a place where people go for shelter
D. a prediction about where something will happen
7. Choose the answer that best completes the sentence below.
Most people take shelter during a tornado; , some scientists try to get close to tornadoes.
B. in particular
C. in contrast
8. What should you do during a tornado?
9. How do scientists use the measurements they get from tornado probes?
10. How can the work of scientists who want to get close to tornadoes help people who want to take shelter from tornadoes? Support your answer with evidence from the passage.
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