Question

you are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon as the conductor and magnesium for the second electrode. which list shows all possible options for the final battery? conductor electrode device lemon zinc light potato magnesium buzzer clock lemon, magnesium, light lemon, magnesium, clock lemon, magnesium, light lemon, magnesium, buzzer lemon, buzzer, clock lemon, magnesium, light lemon, magnesium, buzzer lemon, magnesium, clock lemon, magnesium, light lemon, magnesium, buzzer lemon, magnesium, clock lemon, copper, clock

Explanation:

Step1: Analyze the given choices

We know that the conductor is chosen as lemon and the second electrode is chosen as magnesium. So any option with a different conductor (like potato) or a different second - electrode (like zinc or copper) is incorrect.

Step2: Check each option

• Option 1: It has only two combinations. But there are three device options (light, buzzer, clock), so there should be three combinations.
• Option 2: It has an incorrect combination “Lemon, Buzzer, Clock” (missing the electrode).
• Option 3: All combinations have the correct conductor (lemon) and the correct second - electrode (magnesium) along with each of the three device options (light, buzzer, clock).
• Option 4: It has an incorrect combination “Lemon, Copper, Clock” (copper is the first electrode, not the second one for the final battery as per the problem statement where the second electrode is already chosen as magnesium).

Answer:

Lemon, Magnesium, Light; Lemon, Magnesium, Buzzer; Lemon, Magnesium, Clock