Question

which help you ensure that temperature readings are accurate? check all that apply.
shaking the thermometer before use
using the thermometer as a stirring rod
making sure that the liquid inside the thermometer is at eye level when taking the temperature
making sure that the bulb of the thermometer does not touch the bottom the beaker or the ice taking the temperature
using the celsius scale instead of the fahrenheit scale when taking temperature readings
retry

Explanation:

• Shaking a liquid thermometer resets the liquid column to a low starting point, ensuring it can accurately rise to the correct temperature of the substance being measured.
• Using a thermometer as a stirring rod can damage the thermometer (e.g., break the bulb) and will not yield an accurate reading, as it is not designed for stirring.
• Reading the thermometer at eye level eliminates parallax error, which causes incorrect readings when viewed from an angle.
• If the thermometer bulb touches the beaker bottom or ice, it will measure the temperature of the container/ice directly instead of the liquid, leading to inaccurate results.
• The temperature scale (Celsius vs. Fahrenheit) is just a unit of measurement; using either does not affect the accuracy of the actual temperature value being measured, as they are convertible scales.

Answer:

• shaking the thermometer before use
• making sure that the liquid inside the thermometer is at eye level when taking the temperature
• making sure that the bulb of the thermometer does not touch the bottom the beaker or the ice when taking the temperature