Match the ecosystem to its description or example.
1. desert
ecosystem with the harshest climate
2. forest
receives less than ten inches of rain annually
3. grassland
estuaries, coral reefs
4. tundra
world's largest ecosystem
5. freshwater
wetlands, rivers, lakes
6. marine
much of this ecosystem converted to farms

What term is given to the border between the central alps and the southern limestone alps?

Astudent conducts an experiment to see how music affects plant growth. the student obtains four identical plants. each one is potted in the same type of soil and receives the same amount of sunlight and water each day. plant a listens to classical music for three hours each day. plant b listens to rock music for three hours each day. plant c listens to country music for three hours each day. plant d does not listen to any music at all. 2. based on the experiment in the scenario, which visual aid would be most in showing the change in the plants' heights over time? a. a pie chart b. a line graph c. a timeline d. a bar graph

What statement about charlemagne is not true? a. charlemagne's empire collapsed during his rule b. charlemagne sent missionaries throughout europe c. charlemagne encouraged the arts and education d. charlemagne ruled much of western europe a. charlemagne's empire collapsed during his rule