Explanation

Straw, camphor, alcohol, petrol, diesel etc. catch fire easily to release heat energy and light energy.

So, these are examples of combustible substances.

Explanation

A mature tree can absorb approximately 22 kilograms (or 48 pounds) of carbon dioxide from the atmosphere annually.

This is a remarkable process called carbon sequestration, where trees help remove CO2 from the atmosphere, storing carbon in their trunks, branches, roots, and soil.

Explanation

The least polluted gas chlorine.

The most polluted gas is carbon monoxide.

Explanation

Biogas is a type of natural gas produced through the anaerobic digestion of organic matter.

Such as animal manure and food waste.

It primarily consists of methane and carbon dioxide.

Explanation

Effusion refers to the movement of gas particles through a small hole from a region of high pressure to a region of low pressure.

This phenomenon occurs when gas molecules escape through a tiny opening, often without significant interaction with other molecules. 

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 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

• Aluminium, Magnesium, and Iron are all metals that are commonly used in construction and building materials.
• Including in the manufacture of cars, bridges, and houses.

Explanation

Over the first 20 years after entering the atmosphere, methane has more than 80 times the warming power of carbon dioxide.

Despite the fact that CO2 has a longer-lasting effect, methane accelerates warming in the short term.

Explanation

The gas filled in the pockets of chips is: Nitrogen