Combining the two clear colorless liquids is a chemical change because a different solid substance is formed. Tell students that a precipitate is an insoluble solid that forms when two solutions are combined and react chemically. Insoluble means that the solid will not dissolve. Give Each Student an Activity Sheet.
There are various regulations which may vary depending on where you live and the dropzone you have chosen. In most cases you will need to be 18 years old to start skydiving. If you are 16-18 years old, your parents may give the agreement for you. But again, it depends on the dropzone and country. Some countries may have no regulations, but I would advice you to stay away from the drop zones in them.
OK, that's not 100% accurate. He didn't walk out with his new license; it arrived in the mail two weeks later. The man, 72-year-old Mark Overland of Pacific Palisades, is legally blind, with 94% of his vision gone. When Overland first told me about his adventure, he said he didn't want anyone at the DMV to lose a job over this. But he felt like it was worth speaking up.