Air column: space within the percussion instrument that determines the pitch. Percussion: sounds produced by striking the instrument with a mallet or stick, or striking one instrument against another. 2. Review the process of forming a hypothesis and making a prediction.
Dig short, shallow rows. The rows should be no more than 1/2 inch (1.5 centimeters) deep and spaced 4 inches (10 centimeters) to 6 inches (15 centimeters) apart. 3. Drop the seeds into the rows. Space the seeds approximately 1 inch (25 millimeters) apart in order to allow the onions enough room to grow and mature.
Rows of tomatoes should be at least 5 feet apart, or wider if space allows. In the row, space the plants 18 to 36 inches apart, using the wider measurement if you use cages. We grow our tomatoes up wire fences so we can fan them out and because almost all the varieties we grow are tall, indeterminate types.