National Science Olympiad Forum By SOF Olympiad Trainer - Page 661
  1. Home
  2. /  Forum

User Forum

Ask Your Question
Amitava Pushilal from International Schooling, Singapore
Subject :NSO    Class : Class 3

Post Your Answer

Amitava Pushilal from International Schooling, Singapore
Subject :NSO    Class : Class 3

Post Your Answer

Amitava Pushilal from International Schooling, Singapore
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

Post Your Answer

Amitava Pushilal from International Schooling, Singapore
Subject :NSO    Class : Class 3

Ans 1:

Arnav kaul from Chirec, Hyderabad
Class : Class 2
D

Post Your Answer

Amitava Pushilal from International Schooling, Singapore
Subject :NSO    Class : Class 3

Ans 1:

Arnav kaul from Chirec, Hyderabad
Class : Class 2
D because the others have protein in them

Post Your Answer

Sushil Kumar from dpsnoida, Noida
Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Answer: D Asthma (P) is a chronic disease characterised by inflammation in airways making it difficult to breathe. It is a noncommunicable disease which can be triggered by air borne allergens, respiratory infections, etc. Scurvy (Q) or bleeding gums is caused by deficiency of Vitamin C. Dengue (R) is a viral disease that is communicable as it spreads from an infected person to healthy person through bite of mosquito. Cholera (s) is also a communicable disease that spreads through contaminated food and water.

Ans 2:

Nandana from St Thomas Residential School, Trivandrum
Class : Class 10
Answer: D Asthma (P) is a chronic disease characterised by inflammation in airways making it difficult to breathe. It is a noncommunicable disease which can be triggered by air borne allergens, respiratory infections, etc. Scurvy (Q) or bleeding gums is caused by deficiency of Vitamin C. Dengue (R) is a viral disease that is communicable as it spreads from an infected person to healthy person through bite of mosquito. Cholera (s) is also a communicable disease that spreads through contaminated food and water.

Post Your Answer

Sushil Kumar from dpsnoida, Noida
Subject :NSO    Class : Class 5

Ans 1:

Nandana from St Thomas Residential School, Trivandrum
Class : Class 10
Answer: B. A beetle has four stages in its life cycle - egg, larva, pupa and adult. The young one that hatches from egg is completely different from adult. It experiences complete metamorphosis and undergoes moulting several times to become an adult.

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Answer: B A beetle has four stages in its life cycle-egg, larva, pupa and adult. The young one that hatches from egg is completely different from adult. It experiences complete metamorphosis and undergoes moulting several times to become an adult.

Post Your Answer

Sushil Kumar from dpsnoida, Noida
Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Answer: B In the given setup, the plastic ball that is held at the greatest height from ground will possess maximum potential energy and vice versa. Hence ball Q will have highest potential energy and ball S will have the lowest potential energy.

Post Your Answer

Sushil Kumar from dpsnoida, Noida
Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Answer : B Iron is present in huge amount in earth crust where it occurs in the combined state with other elements. Chief ores of iron are magnetite, hematite etc. Iron is extracted from these ores through a complicated process. Petroleum is fossil fuel that formed when large quantities of dead organisms were buried underneath sedimentary rocks and subjected to both intense heat and pressure. It is yellow to black liquid found in geological formations beneath the earth's surface.

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Iron is present in huge amount in earth crust where it occurs in the combined state with other elements. Chief ores of iron are magnetite, hematite etc. Iron is extracted from these ores through a complicated process. Petroleum is fossil fuel that formed when large quantities of dead organisms were buried underneath sedimentary rocks and subjected to both intense heat and pressure. It is yellow to black liquid found in geological formations beneath the earth's surface.

Ans 3:

Rishi from Deens Academy, BENGALURU
Class : Class 7

Post Your Answer

Sushil Kumar from dpsnoida, Noida
Subject :NSO    Class : Class 5

The amount of carbon dioxide in the air in an area was seen to change over a period of time as shown in the graph here.


Select the most suitable option regarding this.

AA factory has been established in that area at time S.
BDeforestation has been done in that area at time Q.
CA new forest has been established there at point P.
DLarge number of vehicles run by fossil fuels have been introduced in that area at point R.


Ans 1:

Anwesha Kale from wisdom world school, pune
Class : Class 5
The given graph shows that amount of CO2 increases from time Q to R The increases in CO2 amount during interval Q R is indicative of activities like deforastation burning of fossil fuels increases in vehicular transport etc.

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The given graph shows that amount of CO2 increases from time Q to R. The increase in CO2 amount during interval Q – R is indicative of activities like deforestation, burning of fossil fuel, increase in vehicular transport etc.

Post Your Answer