Consider the following marine community:
Sea otters prey on sea urchins and therefore help maintain a healthy sea urchin population.
Sea urchins prey on kelp.
By helping to maintain viable sea urchin populations, the sea otters are also allowing enough kelp to grow and act as a habitat for other organisms.

The solstices and equinoxes, and the number of hours of daylight associated with each, are major factors in the seasons. use the drop-down menus to identify the month when each of these events occurs. the winter solstice in the northern hemisphere: an equinox in both hemispheres: the summer solstice in the northern hemisphere:

How did the lab activities you answer the lesson question: what effect does plate movement have on geologic events and structures at earth’s surface? what did you learn from conducting this lab?

Cardueline finches can be found in what areas of the world?