1. What is the effect of the presence of acid rain in water on the fish population? 2. What is the effect of color of the light to plant growth? 3. How does concentration of silver nitrate affect the formation of silver crystals? Null Hypothesis Alternative Hypothesis Causal (if, then) Hypothesis 1. 2. 3.
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1. Acid rain causes a cascade of effects that harm or kill individual fish, reduce fish population numbers, completely eliminate fish species from a waterbody, and decrease biodiversity. As acid rain flows through soils in a watershed, aluminum is released from soils into the lakes and streams located in that watershed.
2. The color of light DOES affect plant growth, but the effect is more noticeable under low light intensity. Red & blue light are most effective for plant growth, while yellow & green have minimal effect. UV light can damage plants, causing leaves to burn. Growers often use supplemental light to optimize plant growth.
3. A decrease in the size of Ag NPs as the concentration of AgNO 3 is increased has been observed previously 56,57 and has been attributed to a reduction of silver ions at higher concentration; this results in a larger number of nuclei generated, which in turn leads to faster nucleation of silver nanoparticles and smaller nanoparticles being formed.