Which activity only requires hand eashing after the activity is completed

How does social isolation affect teens?

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the dependent variable in galileo's experiment?

Which food would be considered to be a nutrient-poor snack choice? low fat yougurt, nuts and raisins, fruit filled doughnut, raw vegetables