Category: Class 5

Class 5 Science Human Body The Circulatory System Worksheet

Class 5 Science

Chapter – 1

Human Body The Circulatory System

Fill in the Blanks

1. The heart is divided into __________ chambers.
2. The upper chambers of the heart are called __________.
3. The red blood cells contain a red pigment called __________.
4. __________ blood cells help to fight against infections.
5. Platelets help in __________ of blood.
6. Arteries always carry blood __________ from the heart.
7. Veins have __________ to prevent backflow of blood.
8. Regular __________ keeps the heart muscles strong.

Give Reasons

1. Why does the left side of the heart have thicker walls than the right side?
2. Why are arteries deep-seated inside our body?
3. Why is exercise necessary for a healthy heart?
4. Why is smoking harmful for the circulatory system?
5. Why are platelets important for survival?

Short Answer Questions

1. Name the three types of blood cells and write one function of each.
2. How does regular exercise improve blood circulation?

Long Answer Questions

1. Explain the structure and working of the human heart.
2. Differentiate between arteries, veins and capillaries.
3. What are the harmful effects of lack of exercise on the heart? Explain with examples.

Competency Based Questions

1. Ravi eats junk food daily and avoids physical activity. What problems may he face in the future?

2. A person feels tired easily and often suffers from infections. Which blood cells might be affected?

3. During sports day, Meena fainted due to loss of blood from an injury. Which component of blood helps to stop bleeding and how?

Case Study Based Questions

Case Study -1: Rohit is an 11-year-old boy. He spends most of his time watching TV and eating chips. He rarely plays outside. Recently, his doctor said he might develop obesity-related problems if he continues this lifestyle.

Q1. Which type of disease is Rohit at risk of developing?

(a) Communicable                                  (b) Lifestyle

(c) Infectious                                            (d) Genetic

Q2. Which organ will be most affected if Rohit does not exercise?

(a) Kidney              (b) Lungs                   (c) Heart                    (d) Stomach

Q3. Which of the following habits should Rohit adopt?

(a) More junk food                                     (b) More physical activity

(c) No outdoor games                                (d) More TV watching

Case Study 2: Rani got injured while playing and started bleeding. Her bleeding stopped after some time due to the action of blood components.

Q1. Which component of blood helped in stopping the bleeding?

(a) RBC                   (b) WBC                 (c) Platelets           (d) Plasma

Q2. What is the main function of red blood cells?

(a) Carry oxygen                                 (b) Fight infection

(c) Form clots                                       (d) None of these

Q3. Which blood cells protect the body against diseases?

(a) RBC                   (b) WBC                 (c) Platelets           (d) Plasma

Analytical Questions

1. X carries oxygen to body parts, Y fights infections. Identify X and Y.

2. X has thick muscular walls, Y has valves. Identify X and Y.

Class 5 Science Worksheet

Pollination

CHAPTER-4

I. Fill in the blanks

1. The male reproductive part of a flower is called __________.
2. The female reproductive part of a flower is called __________.
3. The outermost green part of a flower is called __________.
4. The swollen base of the carpel is called __________.
5. The sticky top of the carpel which receives pollen grains is called __________.
6. __________ pollination occurs when pollen grains from a flower fall on the stigma of the same flower.
7. Insects, wind, and water are examples of __________ of pollination.
8. A flower having both androecium and gynoecium is called __________ flower.

II. Give Reasons

1. Flowers are called the reproductive part of a plant.
2. Stigma is sticky in nature.
3. Insect-pollinated flowers are usually brightly coloured.
4. Self-pollination does not lead to variation.
5. Unisexual flowers need agents of pollination.

III. Short Answer Questions

1. Define pollination.
2. Write two differences between unisexual and bisexual flowers.
3. What is the function of calyx?
4. What are agents of pollination? Give examples.
5. Write the function of stamen.

IV. Long Answer Questions

1. Explain the structure of a flower with a neat diagram.
2. Differentiate between self-pollination and cross-pollination with examples.
3. Describe the parts of a carpel (pistil) and their functions.
4. Write a note on the importance of pollination in plants.
5. Explain with examples how insects help in pollination.

V. Competency-Based Questions

1. Riya saw that in her garden, papaya plants had flowers which did not bear fruits. What type of flowers are these and why can’t they form fruits?
2. A farmer planted only maize in his field. Which type of pollination will mainly occur in maize and why?
3. Sneha observed that a hibiscus flower could pollinate by itself. Which type of pollination is this and why is it possible?

VI. Case Studies :

1. In a village, farmers grew sunflowers. They noticed that honeybees visited the sunflower fields regularly. The bees sat on the flowers, collected nectar, and flew away to other flowers. While doing so, pollen grains from one flower stuck to their bodies and got transferred to another flower. This process helped in fertilization and seed formation.

Questions:

1. Which agent of pollination is involved here?
   a) Wind
   b) Insects
   c) Water
   d) Animals
2. What type of pollination took place?
   a) Self-pollination
   b) Cross-pollination
   c) Both a & b
   d) None
3. Bright colour and nectar in sunflower help in:
   a) Attracting bees
   b) Seed dispersal
   c) Photosynthesis
   d) Absorption of water

1. A farmer noticed that his maize plants produced flowers that were small and not brightly coloured. They had no fragrance or nectar. Still, the plants gave a good yield of grains. When the wind blew, pollen grains from the tassels (male flowers) reached the silks (female flowers) of other plants and fertilization occurred.

Questions:

1. Which agent of pollination is seen in maize?
   a) Water
   b) Insects
   c) Wind
   d) Animals
2. Which type of flowers are usually pollinated by wind?
   a) Fragrant and colourful
   b) Small, dull, without nectar
   c) Bright and large
   d) None of these
3. What type of pollination took place here?
   a) Cross-pollination
   b) Self-pollination
   c) Both a & b
   d) Artificial pollination

VII. Analytical Type Questions

1. X is the male reproductive part of a flower, Y is the female reproductive part. Identify X & Y.

2. X pollination occurs within the same flower, Y pollination occurs between two different flowers. Identify X & Y.

3. X is the collective term for sepals, Y is the collective term for petals. Identify X & Y.