Which gas is most abundant in the Earth's atmosphere?

True or False: Water expands when it freezes.

Which planet is known as the Red Planet?

What is the primary source of energy for the Earth's climate system?

Which element is essential for the formation of bones and teeth?

True or False: Photosynthesis occurs in the mitochondria of plant cells.

What is the study of living organisms and their interactions with the environment called?

Which of the following is not a renewable energy source?

What is the most abundant mineral in the human body?

True or False: The speed of light is faster in water than in a vacuum.

What is the process by which plants convert sunlight into energy called?

True or False: The Amazon Rainforest is the largest rainforest in the world.

Which of the following is a non-renewable energy source?

Which of the following animals is known for its ability to regenerate lost body parts?

What is the term for a species that no longer has any known living individuals?

True or False: Water covers approximately 70% of the Earth's surface.

Which layer of the Earth's atmosphere contains the ozone layer?

Which type of tree is known for having needle-like leaves and producing cones?

True or False: A biome is a large community of plants and animals that occupies a distinct region.

Which of the following best describes the role of decomposers in an ecosystem?