Primary group of people in committed relationship, related by ancestry, marriage, or adoption. They form a cooperative economic unit to care for offspring and each other. Society defines and sanctions what is a legitimate family. There is no natural family form, the family changes with time.
Basic Homemade Bubble Solution. This is a simple recipe that produces basic and good bubbles. Many people suggest just using water and dishwashing liquid, but the addition of Karo (liquid corn syrup) or glycerin holds the solution together to make nice, round, solid bubbles. Here's the recipe. 1 cup water
You can let the students explore how it works on their own by asking them to blow bubbles into it with a straw, use eyedroppers or a plastic hose connected to a fish tank air pump to bubble air into it, add dry ice (solid carbon dioxide) to it, add vinegar or other weak acids to it, and add a base to it.