Weather
Navigation
Disease
Astronomy
Ocean

100

Caused by differences in atmospheric pressure, it is an element needed for sailing.
What is wind?

100

An instrument used for navigation that shows direction relative to the geographic cardinal directions (or points).
What is a compass?

100

The most effective way to stop the spread of disease.
What is hand washing?

100

The star at the center of our solar system.
What is the sun?

100

The body of water steamships crossed to bring European immigrants to America.
What is the Atlantic Ocean?

200

A massive floating body that broke off of a glacier and what caused the Titanic to go down.
What is an iceberg?

200

A method for navigating using the stars in the night sky.
What is celestial navigation?

200

Nausea and vomiting caused by the rocking of a ship.
What is sea-sickness?

200

The red planet, fourth from the sun, and its period of revolution is 687 days compared to Earth's 365 days.
What is Mars?

200

The type of ship that used wind and currents before the invention of the steam engine for power.
What is a sailing vessel?

300

An instrument for measuring and indicating temperature, typically one consisting of a narrow, hermetically sealed glass tube marked with graduations and having at one end a bulb containing mercury or alcohol that expands and contracts in the tube with heating and cooling.
What is a thermometer?

300

An instrument with a graduated arc of 60° and a sighting mechanism, used for measuring the angular distances between objects and especially for taking altitudes in navigation.
What is a sextant?

300

A highly contagious infection with symptoms typically include fever, cough, runny nose, and inflamed eyes. A red, flat rash which usually starts on the face and then spreads to the rest of the body typically begins 3 to 5 days after the start of symptoms. Today, vaccines mostly eradicated this disease.
What is measles?

300

The star above the Plough otherwise known as the Big Dipper or the Saucepan that is often used for navigating.
What is Polaris or the North Star?

300

Ocean currents greatly affect Earth's ______ by transferring heat from the tropics to the polar regions.
What is climate?

400

An instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude.
What is a barometer?

400

the process of calculating one's position, especially at sea, by estimating the direction and distance traveled rather than by using landmarks, astronomical observations, or electronic navigation methods.
What is dead reckoning?

400

Used to separate and restrict the movement of people; it is a 'state of enforced isolation'. This is often used in connection to disease and illness, and stations at ports of immigration in the United States used these to stop the spread of disease.
What is a quarantine?

400

The moment in which the plane of Earth's equator passes through the center of the Sun's disk, which occurs twice each year, around March 20 and September 23.
What is an equinox?

400

Horizontal water movements generated by forces such as breaking waves, wind, the Coriolis effect, cabbeling, temperature, and salinity differences.
What are currents?

500

An instrument used for measuring the water vapor in the atmosphere. Humidity measurement instruments usually rely on measurements of some other quantity such as temperature, pressure, mass or a mechanical or electrical change in a substance as moisture is absorbed.
What is a hygrometer?

500

The bird the Vikings used to determine whether land was near as an early form of navigation.
What is a raven?

500

What class of passengers had to go through the most rigorous inspections upon landing in America.
What is steerage or third class?

500

He lived from 1473-1543 and wrote a book claiming that the Sun was the center of our solar system with the planets revolving around it.
Who is Copernicus?

500

Wind, water density, and _______ all drive ocean currents.
What is tides?