What is the primary gas that makes up 78% of the Earth's atmosphere?

Nitrogen (N₂)

Fill in the blank: The layer of the atmosphere where weather phenomena occur is called the ______.

Troposphere

True or False: The stratosphere contains a high concentration of water vapor and clouds.

False. The stratosphere is free from clouds and water vapor.

Riddle: I am essential for respiration and found in the atmosphere, yet my level is only about 21%. What am I?

Oxygen (O₂)

What layer of the atmosphere extends from 50 km to 80 km and is known for burning up meteorites?

Mesosphere

Fill in the blank: The phenomenon of trapping heat in the atmosphere by gases like CO₂ is known as the ______.

Greenhouse Effect

Which layer of the atmosphere contains the ozone layer that protects Earth from UV rays? A) Troposphere B) Stratosphere C) Mesosphere D) Thermosphere

B) Stratosphere

True or False: The exosphere is the densest layer of the atmosphere.

False. The exosphere has a very thin layer of air.

Riddle: I float into space due to weak gravity, and I'm lighter than air. What am I?

Helium or Hydrogen

What is the temperature range in the thermosphere that can reach up to 1,480°C?

Thermosphere or Ionosphere

Fill in the blank: The boundary between the troposphere and stratosphere is called the ______.

Tropopause

What is the role of carbon dioxide (CO₂) in photosynthesis?

It is used by plants to produce food.

True or False: Global warming has no effect on precipitation patterns.

False. Global warming causes changes in rainfall patterns.

Riddle: I am a gas made of one carbon and two oxygens, used by plants for energy. What am I?

Carbon dioxide (CO₂)

What are the two main human activities that contribute to increased levels of carbon dioxide in the atmosphere?

Deforestation and burning fossil fuels.

Fill in the blank: The upper boundary of the mesosphere is called the ______.

Mesopause

Which gas is responsible for absorbing heat and maintaining Earth's warmth at night?

Carbon dioxide (CO₂)

True or False: The biosphere is the zone where only the lithosphere interacts with the atmosphere.

False. The biosphere is where the lithosphere, atmosphere, and hydrosphere interact.

Riddle: I am a layer that extends from 480 km to 960 km, and I am the thinnest of all. What am I?

Exosphere

What is the main consequence of excess CO₂ in the atmosphere?

Global warming and altered weather patterns.