Context:  Air pollution is caused by solids, liquids and certain gas particles that are suspended in the air. Smog is air...

Contexto:  Você estava pilotando um velho avião e, de repente, uma falha mecânica faz com que ele caia em uma...

Question: What happens to the pollution of Tietê when its water evaporates and clouds are formed? Hypothesis: Objective: Investigate the...

Question: Is it possible to hide a big body behind a small body? Explain your thoughts. Hypothesis: Objective: Investigate the...