A) Lava tubes B) Glacial ice C) Rock formations D) Sandstone
A) Erosion by wind B) Volcanic activity C) Earthquake activity D) Melting ice and water flow
A) Lava flows B) Icicles and ice formations C) Sand dunes D) Coral reefs
A) Glacial meltwater B) Freshwater from lakes C) Saltwater D) Brackish water
A) Soil fertility B) Ice sheet mass balance C) Humidity in deserts D) Ocean salinity
A) Freshwater ice B) Coal deposits C) Gold veins D) Petroleum reserves
A) Only by observation from afar B) Using remote sensing and mapping C) Through manual excavation D) With underwater diving
A) They grow larger every year B) They attract more wildlife C) They may melt or collapse D) They become colder inside |