Fact 1: Carbon dioxide concentrations in the air have increased over the last decade dramatically.  Fact 2: CO 2 is carbon dioxide.  Given the two facts above, answer the question "What has increased in the air dramatically over the last decade?" with the following options:  - oil  - sugar  - coal  - Cars  - H2O  - CO 2  - He  - O2
CO 2
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Fact 1: The Earth being tilted on its rotating axis causes seasons.  Fact 2: Autumn is a beautiful season.  Given the two facts above, answer the question "What is caused by Earth being tilted on it's axis?" with the following options:  - friction  - acceleration  - climate  - rainfall  - slopes  - wind  - waves  - Autumn
Autumn
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Fact 1: Condensing means changing from a gas into a liquid by reducing heat energy.  Fact 2: Condensation is the change of water vapor to a liquid.  Given the two facts above, answer the question "Changing water vapor to a liquid is done by doing what to heat energy?" with the following options:  - evaporation  - boiling  - Dehydration  - kinetic energy  - reducing it  - sweating  - energy  - Energy.
reducing it
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Fact 1: Some parasites kill their host, but most do not.  Fact 2: Tapeworms are internal parasites of vertebrates.  Given the two facts above, answer the question "What are hosted, but don't usually kill their host?" with the following options:  - ferns  - deadly viruses  - insects  - tapeworms  - bacteria  - orchids  - deadly diseases  - white blood cells

tapeworms
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