Potions

Q:  Under basic chemistry skills: “Separation of mixtures and solutions based on physical properties. (For example: how would you separate sand, salt and water from a bucket of sea water).”  I wanted to clarify whether the kids need to be able to tell you how to do this, or if they actually need to perform this activity. (I thought they won’t have access to a heat source.) Thanks!
A:  The students need to understand how to separate mixtures/solutions based on physical properties as a concept.  They will not be performing this experiment as stated.  It is just an example to get you thinking about how you might do a separation like this…  How might they use physical properties such as size, shape, color, density, magnetism or the ability to sink or float to separate the substances in a mixture?
Q:  Will the kids need to know anything beyond basic orbitals for the Bohr Model (i.e. will they need to know about s, p shells, etc), or just the number of electrons in an orbital for the period 1-3 elements?
A:  The students will need to be able to  “Draw Basic Bohr Model elements when atomic number and atomic mass/weight is given.  Nothing beyond the third period will be asked.”