Frank Cce Everyday Science Solutions for Class 6 Science Chapter 21 Summative Assessment 1 are provided here with simple step-by-step explanations. These solutions for Summative Assessment 1 are extremely popular among class 6 students for Science Summative Assessment 1 Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Frank Cce Everyday Science Book of class 6 Science Chapter 21 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Frank Cce Everyday Science Solutions. All Frank Cce Everyday Science Solutions for class 6 Science are prepared by experts and are 100% accurate.

Page No 108:

Question A.1:

What are the two main sources of food?

Answer:

The two main sources of food are plants and animals.

Page No 108:

Question A.2:

Which vitamin is present in oranges?

Answer:

Vitamin C is present in oranges.

Page No 108:

Question A.3:

What is retting?

Answer:

Retting is the softening and loosening of the jute fibre after it is kept in stagnant water for a few days.

Page No 108:

Question A.4:

Write the names of three opaque materials.

Answer:

A mirror, a brick and a piece of wood are opaque.

Page No 108:

Question A.5:

How is threshing done?

Answer:

Threshing is done by either beating the harvested crops with sticks or crushing them under animals, such as bullocks, which move on the crops in a pattern in order to separate the grains from the husk. Threshing can also be done by machines, such as threshers.

Page No 108:

Question A.6:

Name four different types of changes.

Answer:

The four different types of changes are the following.

  • Fast and slow changes
  • Natural and man-made changes
  • Physical and chemical changes
  • Reversible and non-reversible changes

Page No 108:

Question A.7:

Which is the most attractive part of a flowering plant?

Answer:

Petals are the most attractive part of a flowering plant, as they are beautifully coloured. 

Page No 108:

Question A.8:

What is a streamlined body and how is it useful to fish?

Answer:

The streamlined body is one that tapers at both ends.
Fish have a streamlined body, which helps them to swim easily by reducing the resistance offered by water to their movement.

Page No 108:

Question B.1:

Why is it not good to overcook food?

Answer:

It is not good to overcook food because doing so reduces the nutritional value of food. Some of the nutrients in food, such as vitamin C, are lost if food is cooked for a longer period than is necessary.

Page No 108:

Question B.2:

What kind of soil does cotton require to give good results?

Answer:

Cotton requires black and alluvial soil to give good results.

Page No 108:

Question B.3:

What principle do we use in separation of mixtures?

Answer:

The differences in the physical and chemical properties of the ingredients are used for their separation from mixtures.

Page No 108:

Question B.4:

What is an  irreversible change? Give two examples.

Answer:

The changes that cannot be reversed are called irreversible changes. Examples: Breaking of glass and rusting of iron.

Page No 108:

Question B.5:

State three main functions of a root.

Answer:

The functions of roots are as follows.

  • To hold the plant firmly in the soil
  • To absorb minerals and water from the soil
  • To store food in the form of tubers (in some plants)

Page No 108:

Question C.1:

How many types of vitamins are required by our body? Why do water-soluble vitamins need to be supplied regularly through food?

Answer:

Two types of vitamins are required by the body:
1. water-soluble (vitamin B complex and vitamin C) and
2. fat soluble (vitamins A, D, E and K).
The water-soluble vitamins need to be supplied regularly through food as they get utilised on a daily basis and are not stored in the body.

Page No 108:

Question C.2:

What are pure substances? Why is it difficult to keep substances in pure form in nature?

Answer:

A substance that is made up of only one kind of particle is called a pure substance. It has well-defined properties and composition throughout. In nature, all substances interact with one another, making it difficult to keep substances in their pure form.

Page No 108:

Question C.3:

Draw a carpel and label its parts.

Answer:

A carpel (gynoceium)

Page No 108:

Question C.4:

What is a joint? Name the different kinds of joints found in the body.

Answer:

A joint is a point where two or more bones meet. The different types of joints found in the body are as follows.

  • Ball and socket joint
  • Hinge joint
  • Pivot joint
  • Gliding joint



View NCERT Solutions for all chapters of Class 6