Here are some links to interesting web sites:

Virtual Field Trips

The Earth as a Planet

The Nine Planets: a multimedia tour of the Solar System

NASA has several pages related to this topic. Here are just a few:

Oceanography sites

K-12 resources from Woods Hole Oceanographic Institution

Other interesting sites

Many of these sites provide free information in the form of brochures, posters, and electronic information. For example the Ocean Drilling Program has videos and a CD-ROM on the effects of tectonic activity on climate (From Mountains to Monsoons).

Geologic Time
A United States Geological Survey (USGS) publication on geologic time and how the age of rocks and the Earth are determined.

The Rockdoctor's home page. A site with useful information on rocks and minerals.

USGS Learning Web
USGS education site. Has some nice pages on plate tectonics.

Educational page for the Australian Office of the Ocean Drilling Program

The Australian Minerals and Energy Environment Foundation

Brooks/Cole Publishing's Earth Science Resource Center

The Total Environment Centre

The NSW Environment Protection Authority

The local environment

A large amount of information on your local environment can be sourced from your local council. Here are a few web sites that may help:

Local Government Online

Environment Australia Online