Final answer:
The best method to check the temperature of a bottle is by using a thermometer, which provides an accurate measurement due to the expansion or contraction of materials in response to temperature changes.
Step-by-step explanation:
The best way to check the temperature of a bottle is by using thermometers and temperature scales. Thermometers such as alcohol, liquid crystal, and infrared radiation (pyrometer) thermometers work by using materials that change size (expand or contract) when subjected to temperature changes. Choosing option 1, using a thermometer, will provide the most accurate and reliable measurement. Touching the outside of the bottle, shaking the bottle, or guessing are not reliable methods for temperature measurement.
As materials in a thermometer respond to temperature change, the thermometer reading will change when brought into contact with a substance that is at a different temperature. For example, if a thermometer is at equilibrium with the air and it is placed in water that is not in equilibrium with the air, the thermometer's reading will initially adjust until it accurately reflects the water's temperature.