Google Earth tour ideas

Here is what I plan to do for my Google Earth tour. It is tied with the 3rd grade Social Studies curriculum under the "Time" heading:

Standard 1: Students show how environments and communities change over time through the influence of people.
Objective 1: Predict how human activity will influence environments and communities.
a. Describe various environments; e.g., desert, plains, tropical, tundra, steppe, mountain, frozen, forest.

Location	Activity	Google Earth Content
1. Florida Everglades	Students will view a short clip describing the wetlands biome and the organisms that live there.	path, picture, video
2. Siberian Tundra	Students will view a short clip describing the tundra biome and will then list 5 ways animals that dwell there adapt to the harsh climate.	picture, video
3. Sahara Desert	Students will view several pictures of plants that animals that thrive in the desert climate.	path, picture
4. Andes Mountains	Students will view charts of rainfall and plant growth in the mountains.	polygon
Details of image overlay / path / polygon:	Migration routes of animals, regions of high rainfall, pictures of plants and animals