Life on Earth

Front

Why is water important for living organisms on Earth?

Back

Water helps regulate temperature, provides a medium for biochemical reactions, and dissolves many substances essential for life.

Front

What are the three main factors that allow life to exist on Earth?

Back

The three main factors are the proximity of the Sun, the presence of water, and the composition of the atmosphere.

Front

Which planet in our solar system has an atmosphere that is not suitable for life?

Back

Venus has an atmosphere that is not suitable for life.

Front

In order for life as we know it to exist, a planet must have ______________________

Back

liquid water.

Front

What is the main source of energy for life on Earth?

Back

The main source of energy for life on Earth is the Sun.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the process by which certain gases in Earth's atmosphere trap heat, keeping the planet warm enough to support life.

Front

Define biodiversity.

Back

Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the number of different species.

Front

What role does the Sun play in the water cycle?

Back

The Sun provides the energy needed for evaporation, which is a key process in the water cycle.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

Front

Why is the atmosphere important for life on Earth?

Back

The atmosphere provides essential gases for respiration, protects living organisms from harmful solar radiation, and helps regulate temperature.