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.
Smart Spacing Tomato plants, especially these heirloom varieties, get really big, from 6 to 10 feet tall and taller, 3 to 4 feet wide, and need to be spaced at least 32 - 36 inches apart in rows at least 4 to 5 feet apart. Sure, they are small when you plant them; don't let that fool you.