What are the primary components of air?
a. Oxygen
b. Nitrogen
c. Carbon Dioxide
d. Argon

Which of the following is a greenhouse gas?
a. Carbon Dioxide
b. Oxygen
c. Nitrogen
d. Hydrogen

What is the chemical formula for water?
a. H2O
b. CO2
c. O2
d. H2

What is the process by which plants make their food?
a. Respiration
b. Digestion
c. Photosynthesis
d. Fermentation

Which of the following elements is a noble gas?
a. Oxygen
b. Neon
c. Nitrogen
d. Carbon

What is the main gas found in the Earth's atmosphere?
a. Oxygen
b. Nitrogen
c. Carbon Dioxide
d. Argon

What is the formula for the compound Iron(III) oxide?
a. Fe3O4
b. FeO
c. Fe2O3
d. Fe2O4

Which of the following is not a renewable resource?
a. Solar energy
b. Wind energy
c. Natural gas
d. Hydropower

What is the pH level of pure water?
a. 5
b. 7
c. 9
d. 10

Which planet is known as the Red Planet?
a. Earth
b. Mars
c. Jupiter
d. Venus

Air is primarily composed of several gases, with the main components being:

• Nitrogen - about 78%
• Oxygen - around 21%
• Argon - approximately 0.93%
• Carbon Dioxide - about 0.04%

Among these, carbon dioxide is recognized as a greenhouse gas, which contributes to the greenhouse effect and climate change.

Water's Chemical Structure

The chemical formula for water is H2O, indicating that each molecule consists of two hydrogen atoms bonded to one oxygen atom.

Plant Nutrition Process

Plants produce their food through a process called photosynthesis, where they convert sunlight, carbon dioxide, and water into glucose and oxygen.

Noble Gases

Among the elements listed, neon is classified as a noble gas, known for its lack of reactivity.

Main Atmospheric Gas

The predominant gas in the Earth's atmosphere is nitrogen, which plays a crucial role in supporting life.

Iron(III) Oxide Formula

The formula for Iron(III) oxide is Fe2O3, which is commonly found in rust.

Renewable vs. Non-Renewable Resources

Among the options provided, natural gas is not considered a renewable resource, as it is a fossil fuel that can deplete over time.

pH of Pure Water

The pH level of pure water is 7, which is neutral on the pH scale.

Planetary Identification

The planet known as the Red Planet is Mars, named for its reddish appearance due to iron oxide on its surface.