Chapter 18: Thomas Alva Edison
Complete Textbook Solutions
A. Multiple Choice Questions
- 1827
- 1837
- 1847
- Telegraphy
- Mobile phone
- None of these
B. Answer the Following Questions
C. Fill in the Blanks
- In 1887, he moved to a larger laboratory in West Orange, New Jersey.
- The following year, Edison went to New York in search of work.
- He began to earn money at the small age of twelve.
- At that time, a new railway line was opened by the Grand Trunk Railway from Port Huron to Detroit.
- Thomas Alva Edison was born at Milan, Ohio, in the USA.
D. Words in Use
Question: List these words in the order in which you find them in a dictionary. Then look up their meanings and make sentences with the words.
1. Belch
Meaning: To release gas noisily from the stomach through the mouth.
Sentence: He tried to cover his mouth after a loud belch.
2. Inferior
Meaning: Lower in quality, value or standard.
Sentence: We should not think that someone is inferior because of their background.
3. Itchy
Meaning: Causing an uncomfortable feeling that makes a person want to scratch.
Sentence: The woollen sweater felt itchy against my skin.
4. Malicious
Meaning: Intending to hurt or harm someone.
Sentence: We should not spread malicious rumours about others.
5. Modest
Meaning: Not boastful; simple and humble.
Sentence: Despite his success, the scientist remained modest.
6. Spotless
Meaning: Completely clean, without any spots or stains.
Sentence: She kept her classroom spotless.
7. Ticklish
Meaning: Easily made to laugh or squirm by light touches.
Sentence: My little brother is very ticklish.
8. Twitch
Meaning: To make a sudden, small movement.
Sentence: His eye began to twitch when he was tired.
Listening
Meena: Why do you frown? When you frown, you get back a frown!
Mukesh: You look beautiful with your smile.
Meena: Imagine, a smile can bring so much happiness.
Mukesh: Her smile looks beautiful. Let me smile back at her.
Meena: Remember! Smile even when you see a frown. It makes everyone happy.
Grammar: Present Perfect Tense
A. Things Nimesh Has Done and Has Not Done
| No. | Task | Answer |
|---|---|---|
| 1 | Do yesterday’s homework. (тЬУ) | Nimesh has already done his homework. |
| 2 | Clean the bookshelf. (тЬУ) | Nimesh has already cleaned the bookshelf. |
| 3 | Write to grandmother. (тЬЧ) | Nimesh has not written to his grandmother yet. |
| 4 | Read the headlines in today’s paper. (тЬУ) | Nimesh has already read the headlines in today’s paper. |
| 5 | Help his mother with dinner. (тЬЧ) | Nimesh has not helped his mother with dinner yet. |
| 6 | Help his father clean the home. (тЬЧ) | Nimesh has not helped his father clean the home yet. |
| 7 | Watch the match on TV. (тЬУ) | Nimesh has already watched the match on TV. |
| 8 | Go to the library. (тЬЧ) | Nimesh has not gone to the library yet. |
| 9 | Do yoga. (тЬЧ) | Nimesh has not done yoga yet. |
| 10 | Buy a present for Uncle Umesh. (тЬУ) | Nimesh has already bought a present for Uncle Umesh. |
B. Write a Sentence to Describe the Situation
C. Fill in the Blanks with the Present Perfect Tense
- She has finished her homework. (finish)
- He has lost his new pen. (lose)
- Seema has worked on this project. (work)
- They have constructed the bridge on the river Ganga. (construct)
- Tina has read this book. (read)
- Arnav has resigned from his job. (resign)
- The guests have arrived. (arrive)
- The train has left; you are late. (leave)
- We have washed all the clothes. (wash)
- Grandfather has gone for a walk. (go)