How does your nervous system respond to a stimulus such as a loud noise, a hot object, or a sudden change in temperature?

 It takes in information through our senses, processes the information and triggers reactions, such as making your muscles move or causing you to feel pain.

Explanation:

For example, if you touch a hot plate, you reflexively pull back your hand and your nerves simultaneously send pain signals to your brain.The same as when the temerature changes or you hear a loud moise. Your brain processes it and it causes your nervous system sends signals that determine how you or your body reacts.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.