What criteria do we use to decide whether something is alive?
All the living organisms show various types of processes during their life. This shows that they are alive, not a non- living organism or shows the assurance that they are not dead. When the organism is alive, it shows various types of processes like growth, movement, adaptations or the struggle for survival during the extreme stress conditions, respiration, reproduction, hormonal control and coordination processes, digestion, excretion and circulation. These processes ensure that something is alive.
You are given kerosene, turpentine and water. In which of these does the light travel fastest? Use the information given in Table 10.3.
| Material medium |
Refractive index |
Material medium |
Refractive index |
| Air | 1.0003 | Canada Balsam |
1.53 |
| Ice | 1.31 | ||
| Water | 1.33 | Rock salt | 1.54 |
| Alcohol | 1.36 | ||
| Kerosene | 1.44 | Carbon disulphide |
1.63 |
| Fused quartz |
1.46 | ||
| Turpentine oil |
1.47 | Ruby | 1.71 |
| Benzene | 1.50 | Sapphire | 1.77 |
| Crown glass |
1.52 | Diamond | 2.42 |
NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:
Welcome to the NCERT Solutions for Class 10 Science - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 2: What criteria do we use to decide whether something is alive?....
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