NCERT Class VII Science Solutions: Chapter 10-Respiration in Organisms Part 4

Download PDF of This Page (Size: 301K)

Question 16:

Observe Figure carefully and answer the following questions.

Result for observe Figure carefully

Observe Figure Carefully

Result for observe Figure carefully

  1. In which jar, will the amount of be the highest and why?

  2. In which jar, will the amount of be the lowest and why?

Answer:

  1. ‘C’. The mice kept under the jar will breathe out continuously increasing its amount in the bell jar.

  2. ‘A’ jar in which the released during respiration is used by the plants during photosynthesis.

Question 17:

Observe Figure carefully and answer the following questions.

Result for observe Figure carefully and answer

Observe Figure Carefully and Answer

Result for observe Figure carefully and answer

  1. Which process is being tested in the activity?

  2. What is the result of the activity? Give reasons.

Answer:

  1. Exhalation process during respiration.

  2. The lime water in test tube ‘B’ turns milky but water in tube ‘A’ remains unchanged. Because is present in the exhaled air, it mixes with lime water in ‘B’ and turns it milky.