Go to Slide 23. Jetties can be installed to prevent sand erosion. Where is the location where these jetties have been installed? Country/Province/State: In which direction is the current moving the sand? How can you tell? (Use the images and the description in Slide 22 to help you answer this question).

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed