Please answer these questions :

This chapter is= about matter and its particles and Heat

$$\begin{gathered} Dear Student, \\ The answer to question number 28 and 29 is provided below. \end{gathered}$$
28-The answer is Thermometer.

The liquid-in-glass thermometer is one of the most common instruments used today to measure temperature. As the name suggests, the instrument consists of a glass bulb containing a special liquid. Atop the bulb is a stem that has a scale marked for measuring the temperature. The liquids chosen for thermometers expand and contract significantly in response to temperature changes, so they indicate temperature as a position on the stem's scale. For many years, mercury was a commonly-used liquid for measuring temperature, though for safety reasons thermometer makers have phased it out in favor of alcohol and other substances with lower toxicity. 

29-The degree of the hotness or coldness of a body is known as temperature.

Kindly post other question in different thread.

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