20. Rashida wants to test if a polystyrene container keeps her drink hot for longer. She makes her drink from boiled water. She measures the temperature in two plastic cups (A and B) every ten minutes with sensors joined to a computer. cup A cup B temperature sensors cup A polystyrene container DI ! cup B 0 40 80 120 160 200 240 280 Time (minutes) The graph below shows her results. Which of the following best describes the polystyrene around cup A?
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A fertilizer or fertiliser is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply plant nutrients. Fertilizers may be distinct from liming materials or other non-nutrient soil amendments. Many sources of fertilizer exist, both natural and industrially produced
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