20 . What is the role of saliva in digestion? A.It makes food taste better B. It contains enzymes that start breaking down food C.It prootect the teeth from bacteria 21.Why does chocolate melt in the sun? A.Beacuse of cold air B.Because heat makes solid turn into liquids C. Beacuse it absorbs water 22.What happens when switch is off. A. Electricity flows B.The circuit is broken, and no electricity flows. C.The bulb shine bighter 23.Which of the following helps to conserve electricity? A. Leaving light on all day. B.Using energy-saving bulbs C.Keeping the TVon When not in use 24. Which electronic component controls the flow of electricity? A.Swicth B.Wire C.Bulb 25. what is thefunction of the the small intestine. A .Absorb nutrients B. Store food C.produce enzymes 26.Which of these gadget does not require electricity A. Blender B. Solar lamp C. Television8 A .Ecosystem. B. Habitat C. Hood 28. Which of the following is the habitat of fishes? A.water B. Air C. Land 29. The interaction between living and non- living things at a particular place and time creates is...... A.Community B. habitat C.Ecosystem 30. The electric iron uses ..... A. Oil to work B. water to work C. Electricity SECTION B Answer any Two questions from this section. 1. a. i. What is diges
This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.