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5. Complete the dialogue putting questions to the answers.

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B. One of two chemical processes is always occurring inside a battery at any given time – either charging or discharging.

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B. Yes, it does. The electrolyte solution contains charged atomic particles called ions, which are made up of sulfate and hydrogen.

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B. The sulfate ions are negatively charged, while the hydrogen ions have a positive charge.

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B. The sulfate ions travel to the negative plates if you place a load across a battery (starter motor, headlight, or horn).

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B. I try to explain this reason to you. The matter is that the sulfate ions give up their negative charge, causing the battery to discharge. This excess electron flow out of the negative side of the battery, through the electrical device, and back to the positive side of the battery is what creates DC (direct current) current.

6. Fill in the gaps with suitable words from the box:

a) store b) produces c) chemistry d) form 5) energy f) converts

A battery is basically nothing more than a simple 1)….. set that stores electrical energy. It’s important to understand a battery does not 2) …… electricity; rather, it stores chemical 3) …… necessary to produce electricity. When a battery 4) …… current (to start an engine, for instance), it 5) …… its chemical energy into electricity by a simple change in the 6) ….. of energy stored.

7. Fill in the gaps with suitable form of the predicate from the brackets:

Batteries (make up; made up, are made up) of a series of series compartments (consist; consisting; to consist) of pairs of positive and negative lead plates called cells. Each cell (to have; had; has) two sets of lead plates – one made from lead dioxide with a positive charge and the other from metallic sponge lead with a negative charge. The plates (are stacked; stacked; stack) alternately (negative, positive) and immersed in an electrolytic solution of sulfuric acid and distilled water.