Water experiments

LET’S BE SCIENTISTS 1. MIXURES: What happen to the things when you put them in water? Check it: Homogeneous Heterogeneous Water+salt Water+sand Water+purpurine Water+caffe What happens to the salt? What happens to the rest of products? What happens if we... More

LET’S BE SCIENTISTS 1. MIXURES: What happen to the things when you put them in water? Check it: Homogeneous Heterogeneous Water+salt Water+sand Water+purpurine Water+caffe What happens to the salt? What happens to the rest of products? What happens if we put more salt in the water? And if we put more water? What happens if we shake the mixures? Can we separate water and salt, again? And the rest of substances? 2. SPOTS: Can water clean all kind of spots? Check it: What do you need? - 4 little white clothes - Oil, caffe, mud and sink - Water Procedure: - Put one drop of each product on the different clothes - Put them in the water and rub a little bit - Hung up the clothes - Observe the spots Which is the cleanest one? Why do you think it happens this way? Hydrography (1st term 10-11) Odena (Catalonia) Less