Question

1. which invention did percy spencer accidentally discover while working with radar equipment?

• a) television
• b) telephone
• c) microwave oven
• d) light bulb

1. what year was the first successful light bulb test by thomas edison?

• a) 1879
• b) 1973
• c) 1927
• d) 1945

1. who helped alexander graham bell build the first telephone?

• a) john logie baird
• b) thomas watson
• c) reginald fessenden
• d) william ray young

open - ended questions: answer the following questions in complete sentences.

1. why was the invention of the telephone so important for people?
2. how did percy spencer discover that microwaves could cook food?
3. describe one way that cell phones have changed our daily lives.

Explanation:

1. Percy Spencer discovered the microwave oven while working with radar equipment. He noticed that a candy bar in his pocket melted due to the radar - generated microwaves.
2. Thomas Edison's first successful light - bulb test was in 1879. He used a carbonized bamboo filament that could glow for a long time.
3. Thomas Watson helped Alexander Graham Bell build the first telephone. They worked together on the design and development.

For the open - ended questions:

1. The invention of the telephone was important as it revolutionized long - distance communication, allowing people to speak to each other across vast distances instantly, which improved business, personal relationships, and emergency communication.
2. Percy Spencer was working on radar - related experiments. He noticed that a chocolate bar in his pocket melted when he was near the radar equipment. Further investigation led him to realize that microwaves could cook food.
3. Cell phones have changed our daily lives by making communication extremely convenient. People can stay in touch with friends, family, and colleagues at any time and from almost anywhere, enabling quick decision - making and maintaining social connections.

Answer:

1. c) Microwave oven
2. a) 1879
3. b) Thomas Watson
4. The telephone revolutionized long - distance communication, enabling instant speech across vast distances, improving business, personal relations, and emergency communication.
5. While working on radar experiments, Spencer noticed a chocolate bar in his pocket melted. Further investigation showed microwaves could cook food.
6. Cell phones make communication extremely convenient, allowing people to stay in touch with others at any time and from almost anywhere, facilitating quick decision - making and social connection - maintenance.