Read the passage carefully and then answer the questions that follow:

Question

Read the passage carefully and then answer the questions that follow: Death of the Dinosaurs 65 million years ago, dinosaurs suddenly became extinct, together with a large number of other species. But why did it happen? Many scientists believe that the cause was a large asteroid crashing into the Earth. According to this theory, the asteroid threw huge amounts of dust and water vapour into the atmosphere, blocking out the light of the sun, the vegetation died off, and the dinosaurs starved to death. Evidence for the theory came in 1992 when scientists in Mexico uncovered an underground crater 175 kilometers wide, which turned out to be exactly 65 million years old. The crater was probably caused by an asteroid 10 km in diameter hitting the Earth at thousands of miles an hour, with the force of 70 million one-megaton bombs. According to David Raup of the University of Chicago, this was just one of many such cases. He says that asteroids have caused more than half of species extinctions since life on Earth began 600 million years ago. If he’s right, it seems likely that Homo sapiens will end its days in the same way. NASA to the Rescue As we can’t predict when a really big asteroid will arrive, is there really any point in worrying about it? NASA thinks there is. It estimates that there are between 1,000 and 4,000 asteroids at least 1 kilometre in diameter which regularly cross Earth’s orbit. If such an asteroid hits the Earth once every 300,000 years, this gives the average person roughly a one in 4,000 chance of being around when it happens. A small risk, maybe, but much bigger than the risk of dying in an air crash, which is one in 20,000. NASA aims to set up new telescopes and spend the next 25 years working out which large asteroids are likely to arrive within the next century or two. The idea is that once they’ve identified an asteroid heading straight for us, they can move it out of the way by hitting it with powerful nuclear bombs.

1a Why did the dinosaurs starve to death?

1b What is the evidence given by scientists to support that an asteroid caused mass extinction of plant and animal life?

1c What does the author say will be the fate of human beings? Why?

1d NASA thinks that we should be concerned about being hit by an asteroid. Why?

1e What technology do you think would be used to prevent an asteroid from hitting the earth?

1f Make sentences of your own with the following words/phrases from the passage:

i. extent ii. species iii. crashing iv. blocking out v. homo sapiens vi. estimates

1g Find opposites of the following words from the passage.

i. suddenly ii. huge iii. crashing iv. arrive

1h Nasa has found a large asteroid that will hit the earth in a month’s time. Would you be confident that it would be intercepted? Are you concerned about the debris that might fall on earth and its repercussions? Express your feelings and say how you will protect yourself and your family

22 Jan 2021

Answer :

Word Count : 642

a. Dinosaurs strave to death because asteroid crashing into the Earth and the asteroid threw huge amount of dust and water vapour into the atmosphere , blocking out the light of the sun.

b. The evidence given by scientists are:

1 : The theory came in 1992 when scientists in Mexico uncovered an underground crater 175 kilometers wide, which turned out to be exactly 65 million years old.

2 : The crater was probably caused by an asteroid 10 km in diameter hitting the Earth at thousands of miles an hour, with the force of 70 million one-megaton bombs

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Related Questions

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In today’s competitive environment what is vital for a child’s growth is self-esteem. Examining the causes of aggression, bullying, withdrawal and failure we discover lack of self-esteem to be the root of anti-social behavior. As parents and teachers we are responsible for the mental development and confidence levels of a child. If a child is constantly rebuked and told that he’s a failure, his self-worth hits rock bottom. Unthinkingly we call our children “stupid”, “idiotic” and “irresponsible” and this has a significant impact on their tender psyches. If we have a positive view of our children, they are likely to feel the same about themselves. Help children feel good about themselves, and think highly of themselves. Children will value themselves if their parents value them. Parents are the most influential role models children have. Whatever values and beliefs we want our children to learn, those are the beliefs and values we have to live our lives by. When you understand and accept yourself, it helps you understand and accept others. As a parent or a teacher, you have a great influence over the self-esteem of your child. For the first four or five years, parents are the most important contributors. When children start school, teachers and friends become important. Once they reach adolescence, peer groups play a greater role in steering a child’s self-esteem. As Thomas D. Yarnell, a Clinical Psychologist says: “Self-esteem refers to how you feel about yourself. It includes such things as your self-confidence, self-respect, your independence and your self-reliance. All the ways you feel about yourself and your abilities are wrapped up in the term self-esteem.” Self-esteem has to be nurtured during infancy. If the infant feels well taken care of s/he will feel that the world is a loving place and s/he is an important being. One must avoid expecting too much or too little from children, criticizing, (especially in front of people) not showing appreciation, calling children clumsy, thoughtless, stupid or lazy, telling them that they are failures, overprotecting or neglecting them. To improve their self-esteem, we must praise successes, show affection, show interest in their activities, projects, or problems, we must tell children what to do instead of what not to do