Listening - Should You Rinse Your Dishes?

Watch the video and complete the activities below.

ACTIVITIES

Exercise 1: Multiple Choice

Choose the correct alternative according to the video.

1. Why did Josephine Cochrane invent the modern dishwasher?

A) She wanted to save water in her own home.

B) She was tired of her dishes getting chipped during handwashing.

C) She wanted to win a large cash prize at the Chicago World's Fair.

D) She needed to clean dishes faster for her restaurant.

2. How does the "turbidity sensor" work in modern dishwashers?

A) It measures the weight of the plates in the basin.

B) It calculates the exact amount of detergent needed.

C) It measures the water's dirtiness by checking how much light passes through it.

D) It senses the temperature of the water before starting the cycle.

3. What is a disadvantage of liquid detergent compared to powder or pods?

A) It cannot contain both bleach and enzymes at the same time.

B) It takes a lot more water to dissolve completely.

C) It is more likely to damage wooden items.

D) It causes the dishwasher to run longer cycles.

4. Why shouldn't you rinse your dishes completely before putting them in the dishwasher?

A) Rinsing causes the water to become too hot, which damages plastic.

B) The sensor might trigger a short cycle that won't remove stubborn dirt.

C) It washes away the protective wax coating from the detergent.

D) The water pressure will be too high and might break the glass.

5. According to the video, when is handwashing a better option than using a dishwasher?

A) When you have a lot of plates after hosting a big dinner party.

B) When you need to wash wooden items or certain plastics like travel mugs.

C) When you want to save the maximum amount of water possible.

D) When you need to wash basic everyday ceramic plates.

Exercise 2: True, False, or Not Given

Read the statements and decide if they are True, False, or Not Given in the video.

1. The water in a dishwasher's final sanitizing rinse is generally hotter than the water in a typical kitchen sink.

True

False

Not Given

2. Josephine Cochrane became incredibly wealthy immediately after showcasing her prototype.

True

False

Not Given

3. Surfactants are special molecules that can only be found in dishwasher detergents, not in regular dish soap.

True

False

Not Given

4. Dishwashers help save water by recycling the water multiple times during the wash cycle.

True

False

Not Given

5. A standard dishwasher cycle uses less energy than leaving your TV on for one hour.

True

False

Not Given

Exercise 3: Gap Fill

Drag and drop the correct words from the box into the sentences. There is one extra word you do not need to use.

prototype

counterintuitive

stubborn

residue

equivalent

engine

1. Josephine Cochrane poured her remaining money into building a of her dishwashing machine.

2. Detergent molecules remove food by attaching to them and pulling them into the water.

3. It might seem , but rinsing your dishes beforehand can actually result in a less effective wash cycle.

4. A short wash cycle might not be powerful enough to clean off , baked-on food from your plates.

5. Running a modern dishwasher uses an amount of water to leaving the kitchen tap running for about 2.5 minutes.