Explanation

• Contour lines on a map connect points that have the same elevation (height) above sea level.

Additional information:

• Isotherms: Connect points of equal temperature.
• Isohyets: Connect points of equal rainfall.
• Isobars: Connect points of equal atmospheric pressure.
• Isobaths: Connect points of equal water depth.

Last verified on 15-10-2026

Explanation

• GIS stands for Geographic Information System.
• It is a system designed to capture, store, manipulate, analyze, manage, and present geographic data.
• It is commonly used in urban planning, environmental science, and navigation.

Last verified on 12-11-2026

Explanation

• Halford Mackinder presented the Heartland Theory in 1904.
• He considered the interior of Eurasia strategically important.
• His theory connected control of the Heartland with wider global political power.

Last verified on 12-11-2026

Explanation

• The term Geography was first used by the Greek scholar Eratosthenes.
• He lived in the 3rd century BC (around 276–194 BC).
• He is also known as the “Father of Geography”.
• He calculated the circumference of the Earth with remarkable accuracy.
• His work laid the foundation of modern geographical studies.

Last verified on 02-05-2026

Explanation

• The Gulf Stream is a warm ocean current in the North Atlantic Ocean.
• It originates in the Gulf of Mexico
• It is flows through the Strait of Florida into the Atlantic.
• The Gulf Stream carries warm water toward Western Europe, moderating its climate.

Additional information:

• Labrador Current – Cold (Atlantic)
• Canary Current – Cold (Atlantic)
• Kuroshio Current – Warm (Pacific)
• California Current – Cold (Pacific)
• Humboldt (Peru) Current – Cold (Pacific)

Last verified on 27-07-2026