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 when taking the temperature
using the celsius scale instead of the fahrenheit scale when taking temperature readings
done

Explanation:

• Shaking a thermometer (for mercury types) resets it to a low reading, ensuring it can measure the target temperature correctly.
• Using a thermometer as a stir rod can damage it and skew readings, so this is incorrect.
• Reading the liquid at eye level eliminates parallax error, which distorts temperature values.
• If the thermometer bulb touches the beaker bottom or ice, it measures the container/ice temperature instead of the liquid, so avoiding this ensures accuracy.
• The temperature scale (Celsius vs. Fahrenheit) is just a unit system; it does not affect the accuracy of the actual temperature measurement.

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