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.
Full Answer. For example, in Washington, a person must be at least 12 years old to legally operate a jet ski. In the state of New Jersey, that age is 16. In Ohio, children under the age of 12 are never permitted to drive a jet ski; however, children between the ages of 12 and 15 can legally operate a jet ski with a passenger who is 18 or above. Children age 16 and over can legally operate a jet ski on their own in Ohio.