Chapter 3: The Mystery of Food Application Questions | Environmental Science - EVS Class 5 CBSE

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Chapter 3: The Mystery of Food Application Questions | Environmental Science - EVS Class 5 CBSE | ByteNotes.in

Application Question

Medium difficulty • Concept in a practical situation

Medium

Question 1

Applied Concept

Your friend forgot a half-eaten sandwich in his school bag on Friday and found it on Monday. What changes will he likely see and why?

He will likely see fuzzy coloured patches on the bread and smell a very bad odour.
This happens because microbes found in the air grew on the sandwich over the weekend.
According to the chapter, the moist and closed environment of the bag provided the perfect conditions for these microbes to multiply.

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Application Question

Medium difficulty • Concept in a practical situation

Medium

Question 2

Applied Concept

Suppose you are helping your mother make mango pickle. Why would she ask you to make sure the jar is completely dry before putting mangoes in?

She wants to ensure there is absolutely no moisture left in the jar before the pickle is made.
The textbook teaches us that microbes need water or moisture to survive and grow on food.
By keeping the jar dry, you are removing one of the key things microbes need, helping the pickle last for months.

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Application Question

Medium difficulty • Concept in a practical situation

Medium

Question 3

Applied Concept

You see two bowls of milk: one is kept on the kitchen counter and the other is in the fridge. Which one will spoil first and why?

The milk on the kitchen counter will spoil first because it is at a much warmer temperature.
The textbook explains that cold temperatures inside a fridge slow down the growth of microbes significantly.
The warmth on the counter helps microbes multiply fast, causing the milk to turn sour and smell bad quickly.

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Application Question

Medium difficulty • Concept in a practical situation

Medium

Question 4

Applied Concept

If you are going on a two-day train journey, why would it be better to carry dried fruits instead of fresh cut fruits?

Dried fruits have had their moisture removed, which means microbes cannot easily grow on them during the trip.
Fresh cut fruits contain lots of water and are exposed to air, making them spoil very quickly in heat.
Based on the concept of dehydration, the dried fruits will stay safe and yummy for the entire two-day journey.

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Application Question

Medium difficulty • Concept in a practical situation

Medium

Question 5

Applied Concept

Your younger brother is trying to swallow his food very quickly without chewing. What warning should you give him based on the chapter?

You should warn him not to gulp his food because he might choke on large pieces.
You should tell him that chewing properly releases saliva, which is needed for the body to digest food.
Remind him of Amma's advice in the book to eat slowly and break food down into mush before swallowing.

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Application Question

Hard difficulty • Concept in a practical situation

Hard

Question 6

Applied Concept

A student notices that her mother leaves idli batter outside overnight. Why doesn't she put it in the fridge immediately?

She leaves it out so that good microbes from the air can enter and help the batter rise.
If she put it in the cold fridge, the microbes would slow down and the batter would not become fluffy.
This application of 'good microbes' shows that warm temperatures are sometimes needed to prepare certain traditional Indian foods.

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Application Question

Medium difficulty • Concept in a practical situation

Medium

Question 7

Applied Concept

While eating an apple, you use your front teeth to take a bite. Which type of teeth are you using and what is their specific job?

You are using your incisors, which are the sharp, flat teeth located at the very front of your mouth.
Their specific job, as described in the chapter, is to act like a pair of scissors to cut the food.
This is the first step in breaking down the apple so that other teeth like molars can grind it later.

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Application Question

Medium difficulty • Concept in a practical situation

Medium

Question 8

Applied Concept

If someone in your family has an upset stomach, why might your parents give them a bowl of fresh curd?

Curd contains millions of good microbes that are very helpful for the human digestive system.
These good microbes go into the stomach to help fight off the bad ones that caused the indigestion.
This connects to the textbook's finding that certain microbes are our friends and help us get well when we are sick.

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Application Question

Medium difficulty • Concept in a practical situation

Medium

Question 9

Applied Concept

Imagine you are at a market with your grandfather. He refuses to buy a mango that has a soft, black spot. Why is he doing this?

He is examining the fruit for signs of spoilage, just as Disha's grandfather Thatha did in the market.
The black spot suggests that microbes have already started growing and changing the fruit's texture.
By avoiding such fruits, he ensures the family eats fresh, healthy food that will not cause a stomach upset.

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Application Question

Hard difficulty • Concept in a practical situation

Hard

Question 10

Applied Concept

Why do we see black pepper and salt being used in almost all types of pickles and dried snacks?

Salt and pepper are traditional preservatives that have been used for centuries to keep food from spoiling.
They help create an environment where bad microbes find it very difficult to grow and multiply.
The textbook mentions that spices were so important for preservation that Vasco da Gama traveled far to find them in India.

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Chapter sections

Chapter 3: The Mystery of Food | Application Questions

Your friend forgot a half-eaten sandwich in his school bag on Friday and found it on Monday. What changes will he likely see and why?

Suppose you are helping your mother make mango pickle. Why would she ask you to make sure the jar is completely dry before putting mangoes in?

You see two bowls of milk: one is kept on the kitchen counter and the other is in the fridge. Which one will spoil first and why?

If you are going on a two-day train journey, why would it be better to carry dried fruits instead of fresh cut fruits?

Your younger brother is trying to swallow his food very quickly without chewing. What warning should you give him based on the chapter?

A student notices that her mother leaves idli batter outside overnight. Why doesn't she put it in the fridge immediately?

While eating an apple, you use your front teeth to take a bite. Which type of teeth are you using and what is their specific job?

If someone in your family has an upset stomach, why might your parents give them a bowl of fresh curd?

Imagine you are at a market with your grandfather. He refuses to buy a mango that has a soft, black spot. Why is he doing this?

Why do we see black pepper and salt being used in almost all types of pickles and dried snacks?

Unlock all Application Questions