Marine ecosystems
what is the large body of saltwater that covers more than 70% of the earths surface ?
what is the ocean
what is the best material to make an ROV with
what is PVC pipes?
Adding salt to water makes it this.
What is denser?
This is the flow of electric charge through a wire.
What is current?
This upward force helps objects float in water.
what is buoyancy?
what is the tiny organisms, including phytoplankton, form the base of most marine food webs.
what are plankton
This tool on an ROV allows scientists to see deep-sea environments.
what is a camera?
The ocean contains this dissolved mineral that makes seawater salty.
What is salt?
This measures how strong the electrical push is in a circuit.
What is voltage?
This force pulls objects downward toward Earth
What is gravity?
What Ocean zone recieves enough sunlight for photosynthesis to occur?
What is the sunlight zone
Scientists use ROVs instead of people because it is unsafe to dive this deep.
What is deep water (or high pressure)?
Saltwater sinks below freshwater because it has greater this property.
What is density?
This is the opposition to the flow of electric current.
What is resistance
When an object pushes water out of the way, this process helps create buoyancy.
What is displacement?
these underwater structures provide homes for many fish and are made by living organisms.
What are coral reefs?
why do scientists use ROVs.
what is to explore, inspect, and perform tasks in underwater environments that humans can't.?
When salt dissolves in water, it increases the water’s mass without greatly changing this.
What is volume?
This law explains the relationship between voltage, current, and resistence?
what is Ohm’s law?
A submarine sinks when this increases, making gravity stronger than buoyancy.
What is mass?
This happens when trash or chemicals harm ocean animals and their habitats.
What is marine pollution?
This part of an ROV helps it move up, down, and sideways in the water.
What are propellers?
As seawater temperature decreases, its density does this.
What is increases?
These two forms of energy can be made when electricity flows in a circuit.
What are light and heat?
summarizing how a submarine works, explain why taking in water causes it to sink using buoyancy and gravity.
What is adding water increases mass so gravity becomes stronger than buoyancy?