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