Each one is self - contained and quickly wraps up nicely, and you generally need to make use of one of a few different investigation mechanics. (geardiary.com)
The paper spinners can be used for lots of different investigations, children can try dropping them from different heights, making different sized spinners and observing how they fall differently or adding more or less weight to the bottom end. (science-sparks.com)
«It's been a year of you guys covering different investigations and we have said steadfastly we did everything the right way and we held to high ethical standards,» he said. (dnainfo.com)