Read the following excerpt about water availability to living organisms. “water covers 75 percent of earth. 97 percent of water on earth is salt water. only 3 percent of water is available as fresh water, but most of this water is locked up in solid glaciers and polar ice caps.” based on this information, which is the best approximation of the amount of water on the planet that is available for animals to drink? 1 percent 3 percent 10 percent 75 percent

For a to be healthy, it has to have lots of different kinds of plants and animals. all of the different types of plants and animals in an ecosystem. name four types of ecosystems from those listed in the video. b) c) d) most living things live here. all living things depend on how an ecosystem like a game of sticks? why should we build new buildings on existing land? name four extinct species from those listed in the video. b) c) d) the best way to wipe out a species is to the largest ecosystem in the world is this percent of the world is covered by water. how many of all species in the world live in the ocean? list five things you can do to increase biodiversity. b) c) d) e) how many species are we losing per hour?

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt

20 how are energy cycles and growth cycles related?