Life Processes in Plants Class 7 Worksheet with Answers Science Chapter 10

These Class 7 Science Curiosity Worksheet and Class 7 Science Chapter 10 Life Processes in Plants Worksheet with Answers are excellent for board exam practice.

Class 7 Science Chapter 10 Life Processes in Plants Worksheet

Class 7 Life Processes in Plants Worksheet

Worksheet On Life Processes in Plants Class 7 – Life Processes in Plants Worksheet Class 7

A. Multiple-Choice Questions

Question 1.
Which of the following helps in the transport of water and minerals in plants?
(a) Xylem
(b) Roots
(c) Leaves
(d) Phloem

Question 2.
Which of these is also known as the ‘Food Factory’ of the plant?
(a) Stem
(b) Root
(c) Flower
(d) Leaf

Question 3.
What colour shows the presence of starch when a leaf is stained with iodine solution?
(a) Blue
(b) Blue-black
(c) Yellow
(d) Black

Question 4.
The question consists of an assertion (A) and a reason (R). Read the Assertion and Reason and choose the appropriate answer.
Assertion (A): Water and minerals from the soil are transported upward in the plant.
Reason (R): Phloem transports water and minerals to all parts of the plant.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, and R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false, but R is true.

Question 5.
The question consists of an assertion (A) and a reason (R). Read the Assertion and Reason and choose the appropriate answer.
Assertion (A): During respiration, plants take in oxygen and give out carbon dioxide.
Reason (R): Glucose is broken down in the presence of oxygen, releasing carbon dioxide, water, and energy.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, and R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false, but R is true.

B. State True (T) or False (F).

1. Only leaves can make food for the plant.

2. Stomata are present on the upper surface of the leaves.

3. Lime water turns milky in the presence of carbon dioxide.

4. Rustom Hormusji Dastur studied the effects of the amount of water and temperature on photosynthesis.

5. All the green parts of the plant can perform photosynthesis.

C. Fill in the blanks.

1. _____________ present in the air is essential for plants to prepare food.

2. _____________ is the primary site for photosynthesis.

3. _____________ occurs in only the green parts while _____________ occurs in both green and non-green parts of plant.

4. _____________ is released during the process of photosynthesis.

5. _____________ are important nutrients for the growth of plants.

D. Assign one word to the following terms.

1. It is used to test the presence of carbon dioxide. _____________

2. Tiny pores that help in the exchange of gases. _____________

3. Green pigment present in the leaves. _____________

4. The process in which oxygen is released. _____________

5. A strong chemical that absorbs carbon dioxide from the air. _____________

E. Match Column I with Column II.

Column I	Column II
(i) Respiration	(a) Exchange of gases
(ii) Phloem	(b) Oxygen released
(iii) Stomata	(c) Transport food
(iv) Photosynthesis	(d) Carbon dioxide released

F. Complete the given equations and write the names of the processes.

Wonder Why?

A. Read the following paragraph and answer the questions.

Dev was curious to know how living things in water affect the air around them. He took four glass jars and labelled them P, Q, R, and S. He filled each jar with clean pond water and added a carbon dioxide indicator.

• In Jar P, he placed a small fish.
• In Jar Q, he placed a water-weed plant.
• In Jar R, he placed both the fish and the plant.
• In Jar S, he added only pond water (nothing else).

After a few hours, he checked if the colour of the water had changed in any of the jars.

Question 1.
What was Dev trying to find out through this activity?
________________________________________________________

Question 2.
What do you think happened in Jar P?
________________________________________________________

Question 3.
Which jar would show the least change in the indicator? Why?
________________________________________________________

Question 4.
How do water plants and animals help each other in using and releasing gases?
________________________________________________________

B. Give a reason for the following.

Question 1.
Why do we boil the leaves with alcohol during the starch test activity?
________________________________________________________

Question 2.
Why do the leaves of some plants appear red, brown, or yellow?
________________________________________________________

Question 3.
Why does the leaf change to blue-black colour on adding iodine solution to it?
________________________________________________________

Question 4.
Why do non-green patches on a leaf not turn blue-black in the starch test?
________________________________________________________

C. What Happens?

Question 1.
To the energy released by the plants during respiration?
________________________________________________________

Question 2.
To a plant that does not receive sunlight?
________________________________________________________

Question 3.
If phloem disappears in plants?
________________________________________________________

Learn By Doing

A. Rahul brought two plant twigs from the park. He kept one of them in glass ‘P’ containing plain water and the other one in glass ‘Q’ containing red-coloured water. After an hour, he noticed that the flower in glass ‘Q’ turned red, while the flower in glass ‘P’ stayed the same. When he cut the stems of both twigs crosswise, he observed red-coloured spots in the twigs from glass ‘Q’.

Question 1.
Why did the colour of the flower in glass ‘Q’ change to red?
________________________________________________________

Question 2.
What did Rahul conclude from this experiment?
________________________________________________________

Question 3.
Will Rahul get the same result if he places the plant twig in a glass with yellow-coloured water? Why?
________________________________________________________

B. Observe the given figure and label it.

Now, answer the following questions:

Question 1.
Write the word equation for photosynthesis.
________________________________________________________

Question 2.
What is the stored form of glucose in plants?
________________________________________________________

Question 3.
What is the role of chlorophyll in the process of photosynthesis?
________________________________________________________

Explore With Curiosity

A. Shaili saw a red spinach at the market and started wondering if it contained chlorophyll. Suddenly, she remembered an experiment her teacher had taught in class to test for the presence of chlorophyll in leaves. The following figures show how she performed the test.

Answer the following questions based on the above experiment done by Shaili.

Question 1.
Complete the table given below.

Question 2.
Why did Shaili boil the leaf before adding iodine solution?
________________________________________________________
________________________________________________________

Question 3.
Why did Shaili use iodine solution in the experiment?
________________________________________________________
________________________________________________________

B. Avinash wanted to understand how plants respond to different environmental conditions. With the help of an adult, he selected two similar potted plants and placed them in sunlight under different set-ups. Carefully observe the given setups and answer the following questions.

Question 1.
What is Avinash trying to see in both cases?
________________________________________________________
________________________________________________________

Question 2.
Why was caustic soda placed in the polythene bag with the plant in set-up Y?
________________________________________________________
________________________________________________________

Question 3.
What would happen if both plants were kept in the dark?
________________________________________________________
________________________________________________________

Question 4.
How can we tell if photosynthesis occurred in both plants or not?
________________________________________________________
________________________________________________________

Word Puzzle

Find the words in the word search puzzle with the help of the clues given below.

1. This process occurs only in the day time _____________
2. Extra food is stored in this form _____________
3. Solution that is used to test the presence of starch _____________
4. Solution that removes the chlorophyll pigment from leaves _____________
5. Helps in transport of food to all the parts of plant _____________
6. Substance that absorbs carbon dioxide from the environment _____________
7. Process in which oxygen is absorbed and carbon dioxide is released _____________

Activities

A. Go to a nursery near your house and make a list of plants that,

• need a very small amount of water,
• will die if directly exposed to sunlight for a long period,
• requires plenty of water,
• have leaves other than green colour.

Paste the pictures of some of the plants on the chart paper and write about the leaves and present them in the class.

B. Make a “Breathing Plant Dome” by placing a small indoor plant in a clear glass jar with moist soil. Keep it open for a few days, then seal the jar and place it in the sunlight. Observe if the plant is growing well inside the jar. If yes, make a report of the reasons for the plant to remain healthy.