Tom and his partner weighed 2 samples of soil as part of a science experiment. The first sample weighed 1.816 kilograms (kg) and the second sample weighed 1.241 kg . How much more did their first sample weigh than the second? 1.635 kg

To find out how much more the first soil sample weighed than the second, simply subtract the weight of the second sample from the first. So, 1.816 kg - 1.241 kg equals 0.575 kg. Therefore, the first sample weighs 0.575 kg more than the second. Soil science isn't just about numbers; understanding soil weight can help in agriculture and ecology. Lighter soils often drain well, promoting plant growth, while denser soils retain nutrients but may compact easily. Knowing the weight difference allows farmers and gardeners to tailor soil amendments effectively. When weighing samples, be careful about moisture content! Wet soil can weigh significantly more than dry soil. Always harvest soil samples at similar moisture conditions, or document moisture levels, to ensure accurate comparisons. A common mistake is thinking the weight difference is purely a function of density without considering water content!