Suppose you want to find out the temperature at which different kinds of liquid freeze. what do you need in order to perform the experiment? what is the variable in this experiment?

In order to perform the experiment, in identifying the temperature of different kinds of liquid freeze—the needed equipment is the thermometer. It is because the thermometer is an equipment that helps in determining a temperature. The variable in the experiment would be the temperature as this is not consistent for the effects or outcome will likely change.

a police officer and a ambulance

let that person have a turn to speak : )