Reference no: EM131541393

Assessment: Concept Inventory Pre-Test

Questions

Problem 1 - In a hot summer, why would it feel cooler near lakes and rivers than in other areas of the same park? Explain your answer.

Problem 2 - Should only water or soap and water be used to clean animals after an oil spill? Explain your answer.

Problem 3 - 2.0 liters (0.53 gallon) of a saltwater sample is left outside in an open container for a day. The next day only 1.5 liter (0.40 gallon) of the saltwater sample remains due to evaporation. Has evaporation caused the salt concentration in the sample to increase, decrease, or does it stay the same? Explain your answer.

Problem 4 - A nail left outside over the winter will slowly rust. During this process the mass of the nail will increase. Where does this mass come from? Explain your answer.

Problem 5 - When a bottle of soda is opened you will hear a hiss of escaping gas and observe bubbles to suddenly appear in the solution. Why do the bubbles form? Explain your answer.

Problem 6 - Sodium phosphate (Na3PO4) and potassium phosphate (K3PO4) can both be used as a phosphorus source in chemical fertilizers. Will 1.0 kg of sodium phosphate provide more, less, or the same amount of phosphorus to plants when compared to 1.0 kg of potassium phosphate? Explain your answer.