Chapter 9
Chapter 9
Study Guide!
What are the ocean zones?
* Sunlight zone
* Twilight zone
* Midnight zone
* Abyssal plain
* Trenches
1. Where do most organisms live?
Most organisms live in the sunlight zone.
2. Which seafloor feature is the deepest part of the ocean?
The ocean trenches are the deepest part of the ocean.
3. Which type of animal is a producer in a marine food web?
Plankton are producers.
4. What is the intertidal zone?
The intertidal zone is the part of shore that is covered at high tide and exposed at low tides.
5. Explain bioluminescence
When animals are able to make their own light.
6.What seafloor feature is an extreme environment in the deep ocean?
Large seamount and island chain
7.What seafloor feature is the Hawaiian island?
Volcano
8.What produces the most surface waves?
Winds produce the most surface waves
9.What types of technology do scientists use to explore and
map the ocean floor?
Submersibles, Echolocation
10.Describe the changes in temperature and pressure as you move from the surface of the ocean to the deep ocean?
As you go deeper in the ocean the temperature gets lower,and the pressure gets higher
11.What are some wayshumans negatively impact marine ecosystems?
Overfishing,touching coral reefs,littering,pollution
12. What is salinity?
Salinity is how much salt is dissolved in the water.
13.During which phase of the moon spring and neap tides occur? Why?
Spring tides happen during the new moon and full moon because the Sun and Moon are lined up so the gravitational pulls of the sun and moon work together, seafloor the high tides higher than average and the low tides lower than average. Neap tides happen during the first and third quater moon because the earth, moon,and sun form a right angle so the gravitational pulls work against each other, makingseafloorthe high tides lower than average and the low tides higher than average.
14.How do movements on the seafloor create some of the landforms on the seafloor?
Movements on the seafloor push up or pull apart the ocean floor, creating landforms like mountains, ridges, and trenches.
15.How do density currents form?
Density currents form when ocean water moves because of differences in temperature and saltiness, which change the water's density.