Fact 1: Streams may start with runoff or water seeping out of a spring. Fact 2: Sulfur occurs native in the vicinity of volcanoes and hot springs. Given the two facts above, streams may start with runoff seeping out of water containing what?

OPTIONS:
- chemicals
- Nutrients
- Nitrous oxide
- Helium
- Lithium
- Sulfur
- soil
- Sediment

Answer: Sulfur

Problem: OPTIONS:
- an electric stove
- exercise
- burn wet materials
- friction
- add more oxygen
- decrease amount of fuel
- a hydraulic system
- decrease the oxygen
Q: Fact 1: Afire requires oxygen to burn. Fact 2: Oxygen-enriched air is a fire hazard because the burning rate of combustible materials is increased. Given the two facts above, how do you increase the burn rate?
Answer: add more oxygen

Problem:OPTIONS:
- passenger pigeons
- parasites
- sunlight
- animal plankton
- ice
- horses
- absorb light energy
- honeybees

Fact 1: Zooplankton are tiny animals that feed on phytoplankton. Fact 2: Planktonic plants are called phytoplankton. Given the two facts above, what feed on plant plankton?
****
A: animal plankton

Fact 1: Many plants respond to the days growing shorter in the fall by going dormant. Fact 2: Plants are dormant in the winter. Given the two facts above, what causes plants to sleep?
OPTIONS:
- winter
- heat
- lmestone
- sweating
- photons
- Sun
- Light
- air cools
winter

Fact 1: Behaviors that improve fitness increase through natural selection. Fact 2: Adaptation traits contribute to individual fitness and to the evolution of animal genetic resources. Given the two facts above, the evolution of animal genetic resources can be impacted by:?
OPTIONS:
- extinction
- Mars
- competition
- Darwin
- agriculture
- behavior
- environment
- Galapagos Islands

Answer: behavior

input with options: Fact 1: Antigens are found on cancer cells and the cells of transplanted organs. Fact 2: Organs such as the stomach and liver also begin to develop. Given the two facts above, antigens are found on cancer cells and the cells of transplanted what?
OPTIONS:
- personality
- density
- alveoli
- lungs
- the skin
- epidermal
- livers
- digestion
output:
livers