40 POINTS Why would a scientist revise a model? (choose the best answer)
Group of answer choices

to cover up evidence from a previous experiment

to show off to other scientists

to add unnecessary details to the model

in order to better explain what is happening during a phenomenon

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Question 42 pts
When modeling it is important to (pick two)
Group of answer choices

show beginning, middle and end if it fits the phenomenon

only use one color

make sure there is only drawings and nothing written

use zoom in bubbles to show the unobservable

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Question 52 pts
Which of the following is NOT a limitation of a model
Group of answer choices

inaccurate colors

the type of material used to create the model

a messy model

shapes that are an approximation

To show off to other scientists

Explanation:

law of conservation of matter

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.