7.9C Life and Earth Flashcard

Front

What is the habitable zone in our solar system?

Back

The habitable zone, also known as the Goldilocks zone, is the region around a star where conditions are just right for liquid water to exist on a planet's surface, making it possible for life as we know it. In our solar system, Earth and Mars are considered to be in the habitable zone.

Front

Which planets are in the habitable zone of our solar system?

Back

Earth and Mars are the two planets in our solar system's habitable zone.

Front

What are the basic requirements for life on Earth?

Back

The basic requirements for life on Earth include oxygen, water, and an energy source.

Front

Why is water essential for life?

Back

Water is essential for life because it is a solvent that facilitates chemical reactions, helps regulate temperature, and is necessary for the transport of nutrients and waste in living organisms.

Front

What role does oxygen play in supporting life?

Back

Oxygen is crucial for the process of cellular respiration, which allows organisms to convert food into energy.

Front

What is an energy source for living organisms?

Back

An energy source for living organisms can be sunlight (for plants through photosynthesis), food (for animals), or chemical energy stored in molecules.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy, using carbon dioxide and water to produce glucose and oxygen.

Front

What is the significance of the sun for life on Earth?

Back

The sun provides the energy necessary for photosynthesis, influences climate and weather patterns, and is essential for maintaining the Earth's temperature.

Front

What is the difference between a planet and a moon?

Back

A planet is a celestial body that orbits a star, while a moon is a natural satellite that orbits a planet.

Front

What is the atmosphere?

Back

The atmosphere is a layer of gases surrounding a planet, which is essential for life as it provides oxygen, protects from harmful solar radiation, and helps regulate temperature.