Explanation

• Carbon dioxide (CO2) is a greenhouse gas that plays a significant role in the Earth's greenhouse effect.
• It traps heat radiated from the Earth's surface, maintaining the Earth's temperature and keeping it warm enough to support life.
• Other greenhouse gases include methane (CH4), water vapor (H2O), and nitrous oxide (N2O).

Explanation

The noble gases are also called inert gases sometimes as they are monoatomic and chemically inert under normal conditions.

Explanation

Sublimation is the process in which a solid change directly into a gas.

Explanation

• The gas found in the greatest amount in the universe is Hydrogen.
• Making up 74% of all baryonic matter in the universe.

The elements that make up the universe, ranked in order of their abundance:

• Hydrogen
• Helium
• Oxygen
• Carbon
• Neon
• Iron
• Nitrogen
• Silicon
• Magnesium
• Sulfur

Explanation

The warming of the Earth is largely the result of emissions of carbon dioxide (CO2) and other greenhouse gases from human activities.

These activities include burning fossil fuels, such as coal and oil.

Changes in land use, such as agriculture and deforestation.

Explanation

A Manometer is a device to measure pressures.

A common simple manometer consists of a U shaped tube of glass filled with some liquid. 

Explanation

Spherical shape is because drop always tends to acquire minimum surface area due to the surface tension, and for a given volume, the surface area of sphere is minimum.

Explanation

•  Water Extinguishers are used for Solids
• **
• Water extinguishers are very common and should be used on solid materials only.
• This can include paper, wood, or any other solid fuel.
• Water-based extinguishers are essentially filled with water and use compressed air to help this come out.
• **
• Solid Material fire is called A class fire and Water is often used on it.
  

Explanation

Explanation

• The lightest gas used for filling party and advertisement balloons is hydrogen.
• However, due to its flammability, helium is more commonly used despite being slightly heavier, because it is safe and non-reactive.