Devices & Gadgets
What item helps to clean and purify dirty water?
Water filters.
This long-neck bird shares a name with a large construction tool.
Crane.
Fill in the blanks! Submarines travelling through the ocean by using _____.
Propellers.
Fact or Fiction? Sharks are vulnerable to overfishing.
Fact! Sharks are particularly vulnerable to overfishing.
Fill in the blank! Water reacts poorly with _____ by not mixing without heavy agitation.
Oil.
What tool is used to keep boats in place on the water?
An anchor.
Fill in the blank! Instead of lungs, fish breathe through their ______.
Gills.
How do boats float in the water?
By displacing more water than it weighs.
Fact or Fiction? Some sharks live over 100 years.
Fact! Though their lifespans vary, scientists believe that many sharks can live to be 100, and some think that certain species can live to be up to 500 years old!
Fill in the blank! ______ are people who can swim underwater for a long time, using a tank filled with compressed air.
Scuba divers.
Fill in the blank! _____ robots work but acquiring energy from the sun.
Solar.
Which sea creature has a shape in its name?
Starfish.
Fill in the blank! _______ uses water to power machinery or make electricity.
Hydropower.
Fact or Fiction? There are less than 100 species of sharks.
Fiction! There are actually more than 1000 species of shark, with more being discovered every year!
What are the two factors that affect an object's ability to float?
Buoyancy and water density.
According to the U.S. Coast Guard in the Lost at Sea activity, if you're lost at sea, the most important item to have is?
A shaving mirror.
How many legs does a hermit crab have?
10.
What process involves the following steps, identifying, researching, creating solutions, choosing solutions, constructing prototypes, testing, and re-designing?
The Engineering Design Process.
Fact or Fiction? Sharks live only in saltwater.
Fiction! Although many sharks can only be found in saltwater, there are many species that have adapted to be able to live in both salt and freshwater.
What scientific law describes buoyancy and how/why it works?
Archimedes Principle.
Fill in the blank! A ______ is a circular robot that holds many purposes.
Sphero.
Name 3 of the 5 hermit crab body parts.
Eyes, legs, shell, claws, antennae.
The tanks that allow submarines to dive and surface in the water are called?
Ballast tanks.
Fact or Fiction? Sharks have lived on earth longer than humans have.
Fact! Sharks have been around for approximately 34 000 000 years, whereas humans have only been around for about 200 000 years.
Ocean currents are driven by?
Winds, water density, and tides.