| A | B |
|---|
| Which Australian mammal lays eggs? | Duck-billed platypus |
| Which animal has been hunted almost to extinction because of its horn? | Rhinoceros |
| What is the most common gas in the atmosphere? | Nitrogen |
| What is the Earth's core made of? | Molten iron and nickel |
| Oxygen forms approximately what proportion of the atmosphere? | 20% |
| What kind of tide occurs at full Moon? | Spring tide |
| Which is the largest animal ever to have inhabited the Earth? | Blue whale |
| What is the name given to the outermost layer of the Earth? | Crust |
| What is the largest national park in Europe? | Hohe Tauern in Austria |
| Which sea is so highly polluted that the Barcelona Convention was set up in 1976 to try and clean it up? | Mediterranean Sea |
| What are the 3 main greenhouse gases? | Carbon dioxide, methane,and chlorofluorocarbons |
| What was the viral disease controversially introduced into Britain during the 1950's to reduce the rabbitt population? | Myxomatosis |
| Which European country is committed to decomissioning all of its nuclear reactors? | Sweden |
| Which inland sea between Kazakhstan and Uzbekistan is fast disappearing because the rivers that feed it have been diverted and dammed? | Aral Sea |
| The damaged Chernobyl nuclear power plant station is situated in which country? | Ukraine |
| The dodo was a native bird of which island? | Mauritius |
| What type of rock is granite? | Igneous |
| How do igneous rocks form? | Cooling lava |
| When and where was the Mount Pinatubo eruption? | In the Phillipines,north of Manila, in 1991 |
| What name is given to the layer of the atmospher closest to the surface of the Earth? | Troposphere |
| Which gas forms approximately 1% of the atmosphere? | Argon |
| Which clouds only occur above 10,000 meters? | Cirrus |
| Which theory compares the Earth to a living organism? | Gaia hypothesis |
| Marble is formed by the metamorphosis of which rock? | Limestone |
| What is the main constituent of natural gas? | Methane |
| What name is given to the Earths's single continent,which existed 250 million years ago? | Pangaea |
| What is the term for nutrient enrichment of lakes? | Eutrophication |
| In which part of the atmosphere is the ozone layer? | Stratosphere |
| Which is the world's largest nature reserve? | Etosha Reserve in Namibia |
| Where might you find an aurora? | The polar skies |
| Which of the Earth's atmospheric layers reflects radio waves? | Ionosphere |
| What name is given to the rock formations used as a source of water? | Aquifers |
| Which radioactive substance sometimes occurs naturally in spring water? | Radon |
| What type of rock is formed by the rapid cooling of molten lava? | Obsidian |
| Which quarry in the Italian region of Tuscany is renowned for the quality of its marble? | Carrara |
