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This rock is...

• Igneous

• Sedimentary

• Metamorphic

Choose the correct order for the layers of the Earth

• Core - Center - Mantle - Crust

• Crust - Mantle - Core - Center

• Outer core - Mantle - Crust - Inner core

• Crust - Mantle - Outer core - Inner core

Name the country with the biggest production of uranium

The rocks where minerals are extracted from are called

• Ores

• Mines

• Soil

• Ground

Name the most common solid fossil fuel

Thermal and ___________ are non-renewable resources used to generate electricity.

Which are the basic constituents of soil?

• Carbon - Oxygen - Hydrogen - Sulfur

• Organic matter - Mineral matter - Water - Air

• Organic matter - Ions - Gases - Hydrocarbons

• Water - Air - Hydrocarbons - ions

______________ is the provision of a supply of water from rivers, lakes, reservoirs, or underground sources to farmlands.

Which of these is a symptom of desertification?

• Increased temperature

• Reduced amount of insects

• Increased population of cactuses

• Reduced wood biomass

How is this process called?