In this English worksheet, students read "One Way Ticket to Mars Mission," and then respond to 1 essay, 47 fill in the blank, 7 short answer, 20 matching, and 10 true or false questions about the selection.

[Free Registration/Login may be required to access all resource tools.] Take a look at primary and secondary ecological succession and explore climax communities.

A Scottish conservation charity dedicated to the regeneration and restoration of the Caledonian Forest in the Highlands of Scotland.

[Free Registration/Login may be required to access all resource tools.] Ecosystems are "dynamic." This means that ecosystems change over time. Both natural forces and human actions cause ecosystems to change. Learn more about succession...

Golden-mantled Ground Squirrels are familiar residents of open woodlands, brushy forest-edge habitats, dry margins of mountain meadows, and rocky slopes. They are quick to invade sunny, disturbed areas where pioneer plants provide good...