2. in a homes central heating system, when the room temperature measured by the thermostat reaches a set value, the thermostat sends a message to the heater, and the heater switches off. these actions are an example of,
a. a model
b. feedback
c. input.
d. a process***
3.which of the following statements about models is true?
a.scientist use models to understand how systems work
b.if an inaccurate scale model is used to create a structure, the actual structure will have problems****
c. a diagram is one example of a scientific model
d.all of these are true
4.making models involves creating representations of complex objects or processes to help people study and understand things that cannot be observed directly
a. true
b.false****
2. Feedback
3.all are true
4.true
Hmmmm. You missed all of them.
Thank you
To find the answer to question 2, we can analyze the situation described. In a home's central heating system, the thermostat measures the room temperature and compares it to a set value. When the room temperature reaches this set value, the thermostat sends a message to the heater, which switches off. This process demonstrates how a system reacts to feedback from its environment. Therefore, the correct answer is d. a process.
For question 3, let's evaluate each statement. Statement a states that scientists use models to understand how systems work, which is a common practice. Statement b suggests that if an inaccurate scale model is used to create a structure, problems may arise, which is a possibility. Statement c states that a diagram is an example of a scientific model, which is true. Considering that all three statements are accurate, the correct answer is d. all of these are true.
Lastly, for question 4, the statement indicates that making models involves creating representations of complex objects or processes to help people study and understand things that cannot be observed directly. This description aligns with the purpose of models, making the statement true. Therefore, the correct answer is a. true.