(Colégio Naval 2004) - Question Hard of Sciences

The lunar eclipse can also be called 'Blood Moon' due to its reddish color during the event. This coloration occurs due to the light from stars and planets passing through the Earth's atmosphere and reaching the lunar surface, being called diffuse light or twilight light. What are the main elements present in the Earth's atmosphere responsible for this coloration?

The ozone layer, located in the stratosphere, is responsible for filtering most of the ultraviolet radiation emitted by the Sun. Its role is crucial in protecting life on Earth, as excessive exposure to this radiation can cause serious damage to the skin and contribute to the development of skin cancer. However, the action of chemicals released into the atmosphere, such as chlorofluorocarbons (CFCs), has led to a process of ozone layer depletion, making it thinner and less efficient. Considering this context, answer: 1. Explain what CFCs are and how they are related to the destruction of the ozone layer. 2. Discuss the possible consequences for the planet if the depletion of the ozone layer continues at the current rate, considering the interactions between the ozone layer and the different terrestrial and marine ecosystems.

Plants are very special living beings! They need water and sunlight to grow, just like we need food and water to live. Think of a little plant you saw or have at home, and tell me: Why are water and sunlight so important for this little plant to grow and look beautiful? Explain how you think the plant uses water and sunlight to make its food and stay alive.