Continents and islands are examples of large landforms called a. estuaries b. landmasses c. depressions d. isthmuses

Explain why components that are naturally found in air can be considered air pollutants.

Which of the following planets is classified as a terrestrial planet? a. neptune b. venus c. saturn d. jupiter

Read the article about the fraser river, one of the most important rivers in canada. what is the most important species of fish in this river? why are the numbers of these fish declining?