Science MCQs

Orange zest is used primarily for its flavorful oils enhancing the taste and smell of the jam.

Distilled water is pure and free from minerals or microbes that could contaminate the sanitizer formula.

Sugar acts as a preservative by binding water molecules making them unavailable to microorganisms thus preventing their growth.

Brine refers to the preserving liquid in this case the mixture of vinegar lime juice sugar and salt that is poured over the onions.

Sprinkler systems automate the distribution of water over a large area saving time and effort compared to manual watering.

Hydrogen peroxide is not an active skin disinfectant in this context; it is used to eliminate any bacterial spores that might be present in the other ingredients.

Reducing the heat prevents the sugary mixture from burning or sticking to the bottom while it slowly thickens.

The diaphragm (balloon) captures sound vibrations which are then channeled and amplified through the hollow tubes to the ears.

The valve or stopper is used to start, stop, or regulate the flow of water through the drip pipe.

Salt is used to draw out moisture from the mango pieces through osmosis, reducing the water content that microbes need to grow.