Problem:OPTIONS:
- bryophytes
- moonlight
- cacti
- global warming
- calcite
- viruses
- ferns
- friction

Fact 1: Moss causes chemical weathering. Fact 2: Bryophytes are mosses, liverworts, and hornworts. Given the two facts above, what can cause chemical weathering?
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A: bryophytes

Problem:OPTIONS:
- smallpox
- cancer
- food deserts
- starvation
- hyperthyroidism
- reproduction
- nutrients
- competition

Fact 1: Having food has a positive impact on an organism 's health. Fact 2: If the food distribution is stopped, tens of thousands face starvation. Given the two facts above, an organism's health with be negatively impacted by:?
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A: starvation

Problem:OPTIONS:
- divide
- retina
- produce air
- grow
- produce enzymes
- alveoli
- stay warm
- breathe

Fact 1: Aging occurs as cells lose their ability to divide. Fact 2: Cell damage also occurs during ageing. Given the two facts above, cells can be damaged when they lose their ability to what?
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A: divide

Problem:OPTIONS:
- metabolic reaction
- breathe
- get chemical reactions started
- Slowing the transfer of heat
- A compound that donates proton
- fertilize eggs
- have a positive impact on the environment
- inhibit chemical reactions

Fact 1: All chemical reactions require activation energy to get started. Fact 2: Catalysts lower the activation energy for reactions. Given the two facts above, what do catalysts do?
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A:
get chemical reactions started