Explanation

• approximately 7–8% of an adult’s body weight
• approximately 8–9% of a child’s body weight
• approximately 9–10% of an infant’s body weight

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• Scientists estimate the volume of blood in a human to be approximately 7 per cent of body weight.
• An average adult with a weight of 150 to 180 pounds
• will contain approximately 1.2 to 1.5 gallons (4.7 to 5.5 litres) of blood.

Explanation

Pneumonia is an infection that inflames the air sacs in one or both lungs.

The air sacs may fill with fluid or pus (purulent material), causing cough with phlegm or pus, fever, chills, and difficulty breathing.

Explanation

• A lake starts freezing because of the cold atmosphere. It will first freeze At the top surface
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• concept:
• when the water freezes to ice, the ice becomes significantly less dense than the water and continues to float on the lake's surface.
• Below 4° Celsius, water becomes less dense as it gets colder, causing water to freeze to float to the top.
  
  

Explanation

Blood does not coagulate inside the body due to the presence of Heparin.

Heparin is an anticoagulant that prevents the formation of blood clots.

It is also used before surgery to reduce the risk of blood clots.

Explanation

The guitar is a musical instrument of the chordophone family.

The standard guitar has following six strings:

1. E

2. A

3. D

4. G

5. B

6. E

Explanation

The most effective way to address local environmental problems is a multi-pronged approach that includes:

• Reducing consumption
• Promoting reuse
• Recycling
• Supporting sustainable practices.

This involves individual actions, community initiatives, and advocating for policy changes to protect the environment. 

Explanation

The committee of the Norwegian Parliament awards the prize for peace.

The Nobel Peace Prize is awarded by a committee of five, appointed by the Storting .

The Norwegian Nobel Committee 2019.

Explanation

The primary benefit of conserving hawks and owls to mankind 

They naturally control populations of rodents and other small animals that can cause damage or spread diseases.

These birds of prey are apex predators,

They play a crucial role in maintaining the balance of ecosystems. 

Explanation

The element of an electric stove made nicrome.

Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time.

Explanation

 "The weather is comparatively hotter today."

The word "comparatively" already suggests a comparison, so we use the comparative form of the adjective.

The correct comparative form of "hot" is "hotter".