Ben observes that his car will not start. what is a good testable hypothesiss

Where substance is produced during cellular respiration

How do disease caused by bacteria and disease caused by viruses react to antibiotics

In science class maria observed a white color and cut flowers she sees that the petals turn red when the flowers sitting in a vase that has red colored water she forms a hypothesis that the color reaches the flower through the stem what should we do to confirm the hypothesis