Which statement is a hypothesis? Jada decides to investigate the effectiveness of hand sanitizers compared to soap. She says tha
t hand sanitizers are as effective as soap in destroying bacteria. Many sanitizers have alcohol as their main component. She performs a study in which people use sanitizers for one week and then soap for another week. She then examines the bacterial count.
Hand sanitizers are as effective as soap in destroying bacteria.
Explanation:
A hypothesis is a supposition that is made with limited evidence. Jada is performing this experiment to provide further evidence either supporting or rejecting her theory of whether hand sanitizers are as effective as soap.
Tilling agitates the topsoil and removes ‘unnecessary’ vegetation so the main crop can grow without competition. Tilling improves soil aeration and drainage for plants to grow well. Nonetheless, it can lead to other consequences such as soil erosion because it loosens the soil and makes it easy to be carried away by wind and water.
