The method and the results are on the mixtures and solutions lab. Do the analysis yourself first, then check the answers below.
Quick answer: A mixture is two or more substances combined without a chemical change. These answers go with the grade 6 science lab on mixtures and solutions: the graph, the calculations, the uncertainties and the conclusion explained, for all 7 analysis questions.
Here are the mixtures and solutions lab answers for grade 6 science: graph, calculations, uncertainties and conclusion. First do the lab yourself, then compare, and go back to the lesson if needed.
Use these answers to check your calculations from the sample table. Show the formula, write the substitution and give units. When asked to explain, link the particle movement to how often and how hard particles collide.
In warmer water the particles move faster, so they hit the sugar more often and with more energy. The sugar breaks up and spreads out sooner.
Question 5 Control variables
Mass of sugar, volume of water, stirring rate and the size of the sugar crystals; any three.
Question 6 Reliability
The largest difference is 98 − 92 = 6 s (at 10 °C), small compared with the means. The results are fairly reliable, as the pairs are close.
Question 7 Predict at 80 °C
The time should be shorter, perhaps about 10 s, since the times fall as temperature rises. This is uncertain because it goes beyond the measured range, so the trend may not continue.
