Courses
Courses for Kids
Free study material
Offline Centres
More
Store Icon
Store

Important Questions for CBSE Class 7 Science Chapter 1 - Nutrition in Plants

ffImage
Last updated date: 19th Jun 2024
Total views: 643.5k
Views today: 15.43k

Boost Your Performance in CBSE Class 7 Science Exam Chapter 1 with Important Questions

This is a crucial chapter for students studying this subject as they can learn about the various ways in which nutrition can be beneficial for plants and animals. Class 7 is an extremely vital year for students because it is the first year of middle school for school kids. The topics covered during this year's syllabus is vital because it sets the idea for the upcoming years. Students will learn topics that will help set the groundwork for the 10th standard and help them in their later grades…


In this year's science subjects students will take a deep dive into chemistry, physics, and biology. Students during this chapter will study about nutrition and how it's beneficial for everyone. This text will go over the important topics in the chapter and therefore the essential questions for this chapter also. Students can learn easily using this text and study the way to score marks more easily in these subjects. Students got to prepare themselves for this subject because it can often be quite complex if students don't use any guidance. This article will help students get in their way around chapter1 class 7 science chapter 1.


Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. You can download NCERT Class 7 Science and Class 7 Maths NCERT Solutions to help you to revise the complete syllabus and score more marks in your examinations.


Important Topics Covered Under CBSE Class 7 Science Chapter 1 - Nutrition in Plants

Given below are the topics which the students will learn in CBSE Class 7 Science Chapter 1 - Nutrition in Plants:

  • Different Modes of Nutrition in Plants

  • Photosynthesis in Plants - How do the plants make food?

  • What are the other modes of nutrition in Plants?

  • What are Saprophytes?

  • Process of nutrition in the soil

Popular Vedantu Learning Centres Near You
centre-image
Mithanpura, Muzaffarpur
location-imgVedantu Learning Centre, 2nd Floor, Ugra Tara Complex, Club Rd, opposite Grand Mall, Mahammadpur Kazi, Mithanpura, Muzaffarpur, Bihar 842002
Visit Centre
centre-image
Anna Nagar, Chennai
location-imgVedantu Learning Centre, Plot No. Y - 217, Plot No 4617, 2nd Ave, Y Block, Anna Nagar, Chennai, Tamil Nadu 600040
Visit Centre
centre-image
Velachery, Chennai
location-imgVedantu Learning Centre, 3rd Floor, ASV Crown Plaza, No.391, Velachery - Tambaram Main Rd, Velachery, Chennai, Tamil Nadu 600042
Visit Centre
centre-image
Tambaram, Chennai
location-imgShree Gugans School CBSE, 54/5, School road, Selaiyur, Tambaram, Chennai, Tamil Nadu 600073
Visit Centre
centre-image
Avadi, Chennai
location-imgVedantu Learning Centre, Ayyappa Enterprises - No: 308 / A CTH Road Avadi, Chennai - 600054
Visit Centre
centre-image
Deeksha Vidyanagar, Bangalore
location-imgSri Venkateshwara Pre-University College, NH 7, Vidyanagar, Bengaluru International Airport Road, Bengaluru, Karnataka 562157
Visit Centre
View More

Study Important Questions for Class 7 Science Chapter 1- Nutrition in Plants

A) Very Short Answer Questions (1 Mark)

1. Fill in the blanks: 

i. The components essential for our body are called ____________. 

Ans: Nutrients 


ii. We obtain nutrients through ______________ . 

Ans: Food 


iii. Carbohydrates, _______________ and fats are important nutrients. 

Ans: Proteins 


iv.  ____________ can make their own food from simple nutrients. 

Ans: Plants/Autotrophs 


v. All animals are directly or indirectly _____________ on plants for food. 

Ans: Depend 


2.  State whether true or false. If false, correct the statement by changing the underlined word

a. Animals are the only organisms that can prepare their own food using simple substances from their surroundings. 

Ans: The given statement is false. Plants are the only organisms that can prepare their own food using simple substances from the surroundings. 


b. The intake of food by an organism is called nutrition. 

Ans: The given statement is true. 


c. Stomata absorb sunlight for photosynthesis. 

Ans: The given statement is false. Chlorophyll absorbs sunlight for photosynthesis. 


d. Insectivorous plants are autotrophic. 

Ans: The given statement is false. Insectivorous plants are partially heterotrophic. 

                 

e.  Starch on reacting with iodine solution turns brown in color. 

Ans: The given statement is false. Starch on reacting with iodine turns blue-black in color. 


3. Define the following terms: 

a. Nutrition 

Ans: The process by which an organism receives and digests food to get the nutrients insoluble and simple forms is called Nutrition.


b. Autotrophs 

Ans: The organisms which can build their own food with the help of molecules like carbon dioxide gas and water from their surroundings with the assistance of sunlight and chlorophyll are called Autotrophs.


c. Photosynthesis 

Ans: The process by which organisms use sunlight to synthesize nutrients from carbon dioxide and water to create their own food is called Photosynthesis. In plants photosynthesis generally involves the green pigment called chlorophyll and generates oxygen as a secondary product.


d.  Host 

Ans: An organism that provides nourishment and/or shelters to some other organism is called a Host. The host supports and provides nourishment for the parasite (guest) and hence the host is negatively affected by this relationship. 


e. Parasite 

Ans: An organism that lives inside or on an organism of another species (its host) and which relies on the host for all the nutrients is called Parasite. The parasite is not able to survive without the host body.


B. Short Answer Questions (3 marks)

1. What are stomata? Explain their function. 

Ans: The tiny pores present on the underside of the leaf surface and surrounded by guard cells are called stomata. 

The functions of stomata include, 

  1. Exchanging gases by the process called diffusion for photosynthesis and respiration. 

  2. Transpiration of water i.e. the loss of excess water from the plant by evaporation of water from the upper surface of the leaf. 


2. How is sunlight used by the plant for photosynthesis? 

Ans: 

  1. The main energy source for photosynthesis is sunlight. 

  2. Sunlight is trapped by the green pigment chlorophyll which is present in all green parts of the plants including leaves. 

  3. The energy of the sunlight converts water and carbon dioxide into a sugar called glucose. 

  4. Glucose is used by plants for generating energy and to make other essential substances like cellulose and starch.


3. Why are some plants insectivorous? Give examples. 

Ans: 

  1. Plants require nutrients like nitrogen in addition to carbohydrates for survival. 

  2. In the places where there is a lack of nutrients, especially nitrogen, some plants fulfill their nitrogen requirements by digesting insects in order to absorb the necessary nitrogen. 

  3. Examples of insectivorous plants include Venus flytrap, Utricularia, Drosera, Rafflesia, Pitcher plant, etc. 


4.  Explain the saprotrophic mode of nutrition with an example. 

Ans: 

  1. Partial digestion of substrate outside the body and then absorbing the digested material into the body is called the saprotrophic mode of nutrition. 

  2. With the saprotrophic mode of nutrition, the body releases digestive enzymes to the substrate which causes the partial breakdown of the substrate which later on gets absorbed by the body. 

  3. Examples of organisms that follow a saprotrophic mode of nutrition include some detritivores such as fungi.


5. What is symbiosis? Explain with help of an example. 

Ans: Symbiosis is a relationship that exists between two organisms living in a close physical association which is mutually beneficial for both.

  1. In this relationship, both organisms are equally benefited and no organism is affected by this relationship. These interactions last for a long term with the survival of both species.

  2. Examples of organisms that follow symbiosis include lichen, mycorrhiza, etc.


C) Long Answer Questions (5 marks)

1. Explain how photosynthesis occurs in plants. 

Ans: 

  1. The process by which organisms use sunlight to synthesize nutrients from carbon dioxide and water to create their own food is called Photosynthesis.

  2. In this process, organic food like starch is synthesized by inorganic molecules like water and carbon dioxide.

  3. The main energy source which is sunlight is trapped by the green pigment. 

  4. Chlorophyll is present in all green parts of the plants including leaves.

  5. The raw materials required are carbon dioxide and water where carbon dioxide is absorbed from the atmosphere and water is absorbed from the soil. 

  6. The energy from sunlight enables a chemical reaction that converts carbon dioxide and water into glucose and oxygen. 

  7. Glucose is used by plants for generating energy and to make other essential substances like cellulose and starch.

  8. The overall chemical reaction during the process of photosynthesis can be represented as follows: 

$6\text{C}{{\text{O}}_{\text{2}}}\text{}+\text{}12{{\text{H}}_{\text{2}}}\text{O}\xrightarrow[\text{Chlorophyll}]{\text{Light}}{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{12}}}{{\text{O}}_{\text{6}}}\text{  +  }6{{\text{O}}_{\text{2}}}\text{  }+\text{  }6{{\text{H}}_{\text{2}}}\text{O}$

$ \text{Carbon        water                    glucose      oxygen       water}   \text{dioxide} $


2. How are nutrients replenished in soil naturally? How can the nutrients be replenished artificially? 

Ans: 

  1. The source of nutrients for the plants is soil. 

  2. Plants receive nutrients from the soil which leads to depletion of nutrients in the soil. 

  3. Plants are unable to use nitrogen gas directly from the atmosphere. Some bacteria convert nitrogen from the atmosphere into soluble compounds that can be used by plants. 

  4. As they live in symbiotic association with the roots of leguminous plants, the nitrogen content is replenished in the soil by their actions. Nitrogen gets replenished in the soil naturally by using leguminous plants after cereal crops in the soil. 

  5. In an artificial way, the nutrients can be replenished by using fertilizers and manure. 


3. How can we demonstrate that chlorophyll is necessary for photosynthesis?

Ans:

  1. Necessity chlorophyll can be demonstrated by carrying out an experiment on a variegated leaf. 

  2. Before the start of the experiment, the outline of the leaf is traced on a piece of paper and the green areas are marked. 

  3. To allow the process of photosynthesis, the leaf is placed in sunlight for some hours. 

  4. The leaf is then boiled in alcohol so that it gets decolorized after which the iodine solution is added to the leaf. 

  5. It can be observed in response to iodine solution the green areas of the leaf turn blue-black which indicates that the starch is present. 

  6. Thus, through this experiment, it can be observed that photosynthesis occurs in the green areas of the variegated leaf which shows that chlorophyll is necessary for photosynthesis. 

 

Chlorophyll is necessary for photosynthesis.


4. How do plants obtain nutrients other than carbohydrates? 

Ans: 

  1. Plants synthesize carbohydrates using energy from sunlight to convert carbon dioxide and water to glucose and further on into starch. 

  2. The nutrients other than carbohydrates are obtained directly from the soil. 

  3. The nitrogen content is replenished in the soil by the action of nitrogen-fixing bacteria. Nitrogen gets replenished in the soil naturally by using leguminous plants after cereal crops in the soil. Nitrogen compounds can be replenished in artificial ways by adding fertilizers and manure to the soil. 

  4. Some insectivorous plants like the pitcher plant and Venus flytrap get their nitrogen requirements fulfilled by consuming insects. In this process, the insects are trapped and digested by the plant and the nutrients are released into the body of the plant. 


Class 7 Science Chapter 1 Important Questions- Free PDF Download

This chapter helps students to understand the various factors revolving around nutrition. Students will learn about the very basic functions of plants and how they retrieve nutrition through photosynthesis and carbon dioxide. All these functions help plants to grow more healthy and also help support the living beings around them. In this chapter, we will look into various functions of the plants and how they store and use their food to their benefit. Students will learn a great deal of this subject and also the various topics Lack of practice and a solid course plan and curriculum may act as a barrier preventing you from securing good scores and to urge a radical comprehension of all the essential concepts and topics under this chapter and break the barriers, students must enjoy the continuous practice. Regular practice of Chapter 1 class 7Important Questions can help students improve, become through the concepts and topics, and be efficient during preparation or revision. This article also provides class 7 science chapter 1 extra questions that can benefit students during their preparation of the subject. 


Class 7th Science Chapter 1 Important Concepts 

In this chapter, we will look into various concepts and some of these are explained down below. 

This chapter takes an intrinsic look into how the plants and how it functions in the world by using the right nutrition. The following are some of the topics covered in this chapter-


Stomata 

These are tiny pores found on the underside of the surface of the leaf and are surrounded by guard cells. They play a vital role by exchanging gases during the process of respiration and photosynthesis which in turn causes transpiration of water through evaporation from the leaf surface. 


Importance of Sunlight 

Sunlight is present for most of the time during the day and the plants are very efficient in using this as it is the energy source for the process of photosynthesis. The green pigment known as chlorophyll traps the sunlight which is present all over the plant. This sunlight is later converted into chemical energy. 


Saprotrophic Mode 

This mode is a partial digestion mode of the substrate outside the body wherein the digested material is absorbed into the body. In this mode of digestion, the plant releases digestive enzymes into the substrate. The partially digested substrate is then absorbed by the organism. We can see this type of digestion in fungi. 


Symbiosis 

This is a process where two organisms are mutually benefited. Here in this process, both the organism involved is not going to be harmed in any way and they are equally benefited. One organism could provide nutrition whereas the other organism could do it with some kind of shelter and protection. 


Photosynthesis 

The process where green plants convert solar energy into chemical energy is known as photosynthesis. Inorganic molecules like carbon dioxide and water are used to synthesize food like starch. The process starts off with the trapping of sunlight which is done by the chlorophyll present in green plants. Raw materials such as water and carbon dioxide are the prime ingredients for photosynthesis. Water is absorbed from the soil and carbon dioxide is taken from the atmosphere. The sunlight is the catalyst here in this process which converts the carbon dioxide and water into starch and oxygen. Starch is used up by the plant whereas the oxygen is left out to the atmosphere for other organisms to utilize.


Nutrients Being Replenished in the Soil Naturally 

Plants are constantly using the nutrients found in the soil for their own purpose and this in turn leaves the soil depleted of its nutrients. Nitrogen gas which is present in the atmosphere cannot be directly used by the plants. This nitrogen gas has to first be converted into soluble compounds and this can help plants to solve the later process. So this process is done by bacteria found in the soil and an example of this is Rhizobium. Rhizobium is found in the roots of leguminous plants.


The Process of Plants Receiving Nutrients Other Than Carbohydrates 

Raw materials such as water and carbon dioxide are the prime ingredients for photosynthesis. Water is absorbed from the soil and carbon dioxide is taken from the atmosphere. The sunlight is the catalyst here in this process which converts the carbon dioxide and water into starch and oxygen. Most of the other nutrients that are needed are obtained from the soil directly and this is obtained because of the nitrogen-fixing bacteria known as Rhizobium. There are many ways to obtain the nutrients and we will explore deeper in the chapter. 


Important Questions for Class 7 Science Chapter 1

Students here will learn a number of the essential elements in this chapter 1 of class 7. This may help them in their future grades because it sets the groundwork. Constant practice of the essential questions should help students to tackle any difficult questions in their final examinations the following are class 7th science chapter 1 important questions -


  • How do plants obtain nutrients other than carbohydrates?
  • How can we demonstrate that chlorophyll is essential for photosynthesis?

  • How are nutrients replenished in the soil naturally?

  • How can nutrients be replenished in the soil artificially?

  • What is symbiosis in plants? give an example.

  • Explain the saprotrophic mode of nutrition in plants

  • Why are some plants insectivorous? Give an example

  • How is sunlight used by the plant?

  • What are stomata? Explain their function.

  • Differentiate between autotrophic and heterotrophic nutrition.

  • Describe the role of enzymes in the digestion of food.

  • What are the components of a balanced diet? Explain their importance.

  • Discuss the harmful effects of malnutrition on the human body.

  • What is the importance of water in the diet of organisms?

  • Explain the process of respiration in plants and animals.

  • How do herbivores, carnivores, and omnivores obtain nutrition?

Benefits of Nutrition in Plants Class 7 Important Questions 

Students must understand the importance of this subject and what it holds for college kids of sophistication 9. By utilizing the important questions and with a rigorous practice regime students are going to be ready to score the foremost out of their exams. These exams are often a touch difficult without the proper guidance but by using this article students are going to be ready to study in a more structured manner.


The Following are the Advantages of Chapter 2 Science Class 9 Important Questions

  • It provides students with a structure with which they will study for his or her upcoming examinations.

  • This is a fundamental chapter for college kids and plays an important role in upcoming grades.

  • Students don’t need to worry about the relevance of these questions as they're all cross-checked and updated consistently with the newest CBSE guidelines and rules. therefore the information in this article is genuine and reliable.

  • Students can use this text to use their time wisely, it helps boost their confidence after consistent practice and students can plan their preparation accordingly.

  • Students can utilize and practice the important questions so that they can ace their examinations. 


Conclusion 

These essential questions on plant nutrition greatly benefit Class 7 students. This pivotal chapter serves as a foundation for middle school science, enabling students to comprehend the fundamental aspects of nutrition. Exploring topics like photosynthesis and carbon dioxide, this text empowers students to optimize their time, build confidence through consistent practice, and strategize their preparation. By familiarizing themselves with these important questions, students become aware of the chapter's diverse content and develop the skills to tackle challenging exam questions through dedicated effort.

FAQs on Important Questions for CBSE Class 7 Science Chapter 1 - Nutrition in Plants

Q1. Where can I find a repository of Important Questions for Class 7 Science Chapter 1 Nutrition in Plants?

Ans: Vedantu, a trustable ed-tech company, caters to a well-prepared repository of Important Questions for Class 7 Science Chapter 1 Nutrition in Plants as well as other chapters. Vedantu is known for its top-quality study materials and other resources like sample papers, important questions, etc. It selects these questions based on the exam pattern and most frequently asked questions. Vedantu provides a free PDF of Important Questions for Class 7 Science Chapter 1 Nutrition in Plants prepared by subject experts. These questions are also solved by subject matter experts to provide a clear cut understanding of the chapter. These are extremely helpful in exam preparation and boost scores.

Q2. How to make the most of Vedantu’s Important Questions for CBSE Class 7 Science Chapter 1 Nutrition in Plants to score well in exams?

Ans: Students can solve Vedantu’s important questions for Class 7 Science Chapter 1 Nutrition in Plants to score well in school exams. The extra questions provided by the e-learning platform for the first chapter of Class 7 Science can be utilized to understand what types of questions can students expect from the exam. These questions help learn concepts and practise the chapter. At Vedantu, the set of important questions are also solved by subject matter experts. By referring to the PDF file of important questions for Class 7 Science Chapter 1 Nutrition in Plants, students will be able to practice the chapter properly and will get an idea of important questions as well. The material can also be used at the time of the revision to get exposure to new questions.

Q3. Why should I practice extra questions for Class 7 Science Chapter 1 Nutrition in Plants?

Ans: Practising extra questions for CBSE Class 7 Science Chapter 1 Nutrition in Plants is crucial to score well in the exam. The important questions for Class 7 Science Chapter 1 Nutrition in Plants allow students to practice the chapter thoroughly. Working on these questions will not only make students familiar with all types of questions that can be asked in the exam, but it will also boost their confidence. The free PDF file of Important Questions for Class 7 Science Chapter 1 at Vedantu is designed to cover all the important topics of the chapters. These questions are based on the exam pattern and the necessary guidelines. These are added after referring to previous year question papers and must be downloaded to learn the chapter properly and score well.

Q4. What are some of the important questions for Class 7 Science Chapter 1 Nutrition in Plants?

Ans: Following are a few important questions for Class 7 Science Chapter 1 Nutrition in Plants:

  1. How are nutrients replenished in soil naturally? How can the nutrients be replenished artificially?

  2. How can we demonstrate that chlorophyll is necessary for photosynthesis?

  3. How do plants obtain nutrients other than carbohydrates?

  4. Explain how photosynthesis occurs in pants.

  5. What is symbiosis? Explain with the help of an example. 

  6. Explain the saprotrophic mode of nutrition with an example.

Download the file to get more questions for the chapter and excel in exams.

Q5. What is Nutrition?


Ans: Nutrients are a source of nourishment required by living beings to grow (building tissues) and to produce energy. There are various other short questions and answers in the NCERT textbook for which you can find the answers in NCERT Solutions provided by Vedantu. You can also focus on the Important Questions as provided by Vedantu for an easygoing revision. The important questions cover all the key fundamentals that are vital from the perspective of the exam.


Q6. What is the importance of nutrients?


Ans: Nutrients are a basic requirement in both plants and animals and are found in various ways. They are the source of nourishment which makes them vital for survival. The importance of nutrients can be categorized into two factors:

  • Development: Plants require nutrients to grow from a sapling into a tree. They use the nutrients to produce food, energy, and photosynthesis.

  • Repair: Nutrients are the basic necessity for repairing broken tissues and replacing the dead ones.

Q7. How are plants useful for all?


Ans: Through the process of photosynthesis, plants give us oxygen and take in carbon dioxide. It is not only essential for the survival of all animals and humankind, but it also cleans the atmosphere. Various species of plants are our basic resource for several food crops and fibres. We cultivate crops, take fruits from plants, and process certain plants for materials like rubber. They help in maintaining the balance in the ecosystem. Hence, they are useful to all.


Q8. What are the raw materials required for photosynthesis?


Ans: Plants require water, carbon dioxide, and sunlight as raw materials to be able to do the process of photosynthesis. It is an important event for the conversion of carbon dioxide into oxygen and energy in the form of sugar for the preparation of food in plants. This is a process conducted only by the green plants that have chlorophyll. Hence chlorophyll and the raw materials are the basic requirements for photosynthesis to take place. 


Q9. What are the types of nutrition in plants?


Ans: Plants exhibit autotrophic and heterotrophic nutrition as two modes of nutrition. Autotrophic nutrition is when plants produce their own food using sunlight, water, and carbon dioxide. While certain plants and animals depend on other plants for nutrition which is known as heterotrophic nutrition. This is because not all plants contain chlorophyll which is a necessary part of photosynthesis. Chlorophyll is the green pigment that gives green colour to the plants. To study more about nutrition, students can download the Important Questions free of cost from the Vedantu website or mobile app.