What does it mean to use all appropriate senses to observe?
A. Don't look at things that you're not told to.
B. Follow your teacher's instructions at all times.
C. Taste can never be used to make observations.
D. Ask an adult before observing using smell, taste, or touch.

One or more substances changing into one or more substances is an example of a

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

What is the most common reason for matter changing its state?