Here are the answers to unit 2 lesson 11 biology aquatic ecosystems

which factor has greatest importance in determining the characteristics of an aquatic ecosystem? water depth

which is one way that a freshwater wetland differs from a lake or pond? water does not always cover a wetland as it does a lake or pond

which of the following would disappear first if an estuary was destroyed? shellfish

which of the following statements is not true about the open ocean? the open ocean begins at the low tide mark and extends to the end of the continental shelf

how does the intertidal zone differ from the near shore zone in marine ecosystems? organisms in the intertidal zone experience greater extremes of temp. and wave action than organisms in the near shore zone.

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

What material did the moon come from?

20 point pls brianliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?