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.
Plant staked tomatoes 2 feet apart in rows spaced 3 to 4 feet apart. Dwarf tomatoes will only need 12 inches between plants. To give yourself enough room to harvest tomatoes, space vigorous indeterminate cultivars 4 feet apart and space rows 5 to 6 feet apart.