مراجعة الصف الثانى الثانوى ترم 1(Read the passages)

السؤال الخامس و السادس

5- Read the following passage, then answer the questions:

 In the mid-19th century, a part of London called Soho did not have proper sanitation services. On 31 August 1854, there was an outbreak of a serious disease called cholera in Soho. In just three days, 127 people died. By 10 September, 500 people had died. John Snow, a doctor, visited the houses in Soho and asked, "How many people have died of cholera in this house? Where do you get your drinking water?" He drew a black dot on a street map for every house where someone had died. The dead people had all drunk water from one pump on Broad Street. If people took their water from another pump, they didn't get cholera. Although he could not find cholera germs in the water from Broad Street, the City Council closed that pump until the cholera outbreak ended. Snow's research showed that disease can spread in dirty water. 

a. Give short answers to the following questions:

1. How many people died in the first three days of the cholera outbreak?

2. Why was Snow's research important?

3. Why did the City Council close the pump on Broad Street?

b. Choose the correct answer from a, b, c or d:

4. Why did John Snow visit the houses in Soho?

a) He wanted to give medicine to the people who had cholera.

b) He wanted to learn how cholera spread.

c) He wanted to look for cholera germs.

d) He wanted to make a map of Soho.

5. Which sentence is not true?

a) Snow showed that disease can spread in dirty water.

b) The dead people had all drunk the same water.

c) Snow found cholera germs in the Broad Street water.

d) The City Council closed the Broad Street pump.

6 - Read the following passage, then answer the questions:

 How do scientists map the ocean floor? They can use a submersible, which is a small vehicle that can travel deep under water. The submersible has sonar equipment that makes sound waves. The sound travels through the water and when it hits the ocean floor, it bounces back up to the sonar equipment. The equipment measures how much time it takes the sound to travel to the bottom and back. Then it calculates the distance that the sound travelled. The sonar finds low and high points and draws a map of the ocean floor. The lowest known point on Earth is the Challenger Deep. Scientists measured its depth with sonar and found that it is about 11,000 metres. It is deeper than Mt Everest is high. You could put Mt Everest at the bottom of the Challenger Deep and there would still be 1600 metres of water above it!

 a. Give short answers to the following questions:

1. What is sonar used for?

2. Where is the sonar equipment that scientists use?

3. How deep is the lowest known point in the ocean? 

b. Choose the correct answer from a, b, c or d:

4. What does the underlined it mean in it bounces back up?

 a) the sound             b) the equipment    c) the water      d) the ocean floor

5. Which of these statements is correct?

 a) Mt Everest is at the bottom of the Challenger Deep.

 b) Mt Everest is less than 11,000 metres high.

 c) Mt Everest is more than 11,000 metres high.

 d) Mt Everest has water above it.