A hunter experiences a backward force upon firing a gun. Which of the Newton's law of motion is demonstrated in the situation?

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22. A hunter experiences a backward force upon firing a gun. Which of Newton's law of motion is demonstrated in the situation? This is an example of Newton's Third Law, which states that for every action, there is an equal and opposite reaction. The gun exerts a forward force on the bullet (action), and the bullet exerts an equal and opposite backward force on the gun (recoil). C. Third Law

23. Which of the following elements has four electron shells? To determine the number of electron shells, we look at the period number of the element or its electron configuration.

    • A. $_{19}K$ (Potassium): Electron configuration is 2, 8, 8, 1. This has 4 electron shells.
    • B. $_{13}AL$ (Aluminum): Electron configuration is 2, 8, 3. This has 3 electron shells.
    • C. $_{15}P$ (Phosphorus): Electron configuration is 2, 8, 5. This has 3 electron shells.
    • D. $_{5}B$ (Boron): Electron configuration is 2, 3. This has 2 electron shells. A. $_{19}K$

24. Canned foods and drinks have expiry date on them. The hazard involved in taking an expired drink is Expired food and drinks can harbor harmful bacteria or toxins, leading to illness. A. food poisoning

25. Which of the following statement best describes the term green economy? It includes A green economy aims to reduce environmental risks and ecological scarcities, and one of its core objectives is to reduce carbon emissions. C. reduced carbon emissions

26. A mother took her child to the hospital and upon investigation, it was noticed that the child's diet was lacking in zinc. What could this result in? Zinc is crucial for growth and immune function. A deficiency can lead to: I. Decreased growth in the child (Zinc is vital for cell growth and division). III. Inability of the body to fight infections (Zinc plays a key role in immune system function). Anaemia is typically associated with iron deficiency, not primarily zinc. D. I and III only

27. When an object is thrown from a certain height, the gravitational pull of the earth helps it to develop Gravity causes objects to fall towards the Earth, continuously increasing their speed. This change in speed is acceleration. D. acceleration

28. The consequences of the greenhouse effect on humans include I. flooding of coastal cities (due to sea-level rise from melting ice and thermal expansion). II. desertification of fertile areas (due to changes in rainfall patterns and increased temperatures). III. increased number of storms (due to more energy in the atmosphere). IV. increased use of fossil fuels (this is a cause of the greenhouse effect, not a consequence). Therefore, I, II, and III are consequences. C. I, II and III only

29. The portion of air which acts as a solvent is Nitrogen makes up about 78% of the Earth's atmosphere, making it the most abundant gas and the primary solvent for other atmospheric gases. C. nitrogen

30. Marking out farm plots and beds can best be done by using Pegs are commonly used to mark out boundaries, corners, or specific points on the ground for construction or agricultural purposes. D. pegs

31. A river flowing over a waterfall has a lot of energy. Which of the following energy is made from the water fall? The kinetic energy of falling water is harnessed in hydroelectric power plants to generate electricity. C. Electricity

32. A prokaryotic cell possesses all the following characteristics except Prokaryotic cells are characterized by the absence of a membrane-bound nucleus and other membrane-bound organelles. Their genetic material is located in a region called the nucleoid, not within a nucleus. C. has genetic materials in its nucleus