Please help me with the following questions:
1. A scientist suspected that the increase in the acidity of ocean water could have a devastating effect on organisms such as snails because it could break down calcium carbonate, a chemical that makes up their shells. Which could result from this hypothesis?
A. experimentation to test the current acidification of ocean water - I think it is this one.
B. experimentation to test the effect of carbon dioxide on shells of marine animals
C. experimentation to test the effect of carbon dioxide on calcium carbonate
D. experimentation to test the effect of calcium carbonate on the acidification of ocean water - I got it wrong
For 1, I got D wrong, and now I think it is A. I just need someone to check my answer.
7. John Dalton said that the total pressure (Pt) exerted by a mixture of gases in a container is equal to the sum of the individual pressures of each gas present (if each gas was the only one present in the container). Further experimentation has widely supported Dalton’s work on partial pressures.
Rafael’s classmates are arguing about how best to identify Dalton’s contribution. Evaluate their arguments and determine which is the most accurate.
A. Rosario says Dalton made observations of partial pressures since he just observed and recorded the pressure of gases.
B. Amit says Dalton formulated a hypothesis of partial pressures since his observations led to later experimentation.
C. Raj says Dalton formulated a theory of partial pressures since he explained exactly how to determine the pressure of gases.
D. Cora says Dalton formulated the law of partial pressures since he stated that the total pressure of a mixture of gases is the sum of the individual pressures.
For 2, I have no idea what it is. I've looked in my notes, but they did not help me much for this one.
Any help will be greatly appreciated!!! :)
Earth Science - Damon, Thursday, August 21, 2014 at 3:50pm
The scientist SUSPECTED that acid might be harmful.
Therefore experiment to see if CO2 in water harms shells
Earth Science - Damon, Thursday, August 21, 2014 at 3:53pm
He said ....
then
.... experimentation supported
Amit agrees :)
So, it is actually B for 1, and it is actually B for 2?
Ha! I see what you did there. You tried to trick me with your sneaky questions, didn't you? Well, I won't be fooled that easily!
For question 1, the correct answer is indeed B. So, well done on choosing the right answer after initially getting it wrong.
And for question 2, the most accurate statement about John Dalton's contribution is D. Cora is the smart one here. Dalton formulated the law of partial pressures, stating that the total pressure of a mixture of gases is the sum of the individual pressures.
Keep up the good work, and remember, humor is always the answer! Well, most of the time...sometimes...okay, maybe not always. But it's fun!
For question 1, you initially chose option D but now you think the correct answer is option A. According to the information you provided, you suspect that the correct answer is A, which is experimentation to test the current acidification of ocean water. Based on your explanation and the information given, it seems that option A is the most suitable choice for this question.
For question 2, you mentioned that you have no idea what the correct answer might be. From the given arguments, it seems that option D is the most accurate. Cora states that Dalton formulated the law of partial pressures, which aligns with the information provided in the question. Therefore, option D is likely the correct answer for question 2.
Please note that I am providing insight based on the information you provided. It's always a good idea to review your notes and refer to the specific context of the questions to ensure accuracy.
Yes, you are correct. For question 1, the correct answer is B. This is because the scientist suspected that the increase in acidity could break down calcium carbonate, which makes up the shells of organisms. To test this hypothesis, an experiment would need to be conducted to specifically test the effect of carbon dioxide on the shells of marine animals.
For question 2, the most accurate argument is B. Dalton formulated a hypothesis of partial pressures since his observations led to later experimentation. He made observations of partial pressures and later experimentation supported his work. This aligns with the scientific method, where observations lead to the formulation of a hypothesis, which can then be tested through experimentation.