Problem:OPTIONS:
- Something that causes allergies
- metabolic reaction
- refract or absorb.
- transfer of electrons
- The bending of a ray of light
- Food poisoning
- communication
- oxidation reaction

Fact 1: Chemical bonds form when substances react with one another. Fact 2: Chemical Bonding A chemical bond is the sharing or transfer of electrons. Given the two facts above, what occurs when substances react with one another?
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A: transfer of electrons

Problem:OPTIONS:
- Energy
- Energy.
- hunger
- pain
- differences
- kinetic energy
- heat energy
- similarities

Fact 1: Some touch receptors sense differences in temperature or pain. Fact 2: Touch receptors are a type of mechanoreceptor. Given the two facts above, some mechanoreceptors sense what in temperature?
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A: differences

Problem:OPTIONS:
- water
- rivers
- saliva
- fats
- Enzymes
- protein
- spring
- Cooking

Fact 1: Rain causes erosion. Fact 2: Erosion of rock makes nutrients available. Given the two facts above, what causes nutrients to be available?
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A: water

Problem:OPTIONS:
- LEDs
- Two
- Many
- wind
- well
- 12
- bent
- tube

Fact 1: Tunicates reproduce sexually. Fact 2: Bulbs are classifies as tunicate or non-tunicate. Given the two facts above, how many ways can a bulb reproduce?
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A:
Two