How to Build a Lava Moat (with xkcd)

What is the approximate temperature range required to melt most rocks into lava?

• 200-400°C

• 500-700°C

• 800-1200°C

• 1500-2000°C

What physical property of lava primarily determines the intensity and color of its glow?

• Viscosity

• Chemical composition

• Temperature

• Density

Why does a lava moat require a continuous energy input to maintain its glowing state?

• The lava constantly evaporates into the atmosphere.

• The lava radiates energy in the form of heat and light.

• The molten rock solidifies quickly without external force.

• Chemical reactions within the lava consume energy.

For an off-grid lava moat, which power source is suggested as the most practical option for a single-family home?

• Solar panels

• Commercial-scale coal power plant

• Geothermal power

• Nuclear power plant