Question

multiple choice 4 points
what is the general approach of the clean air act toward air pollution control?
it relies on market - based mechanisms to reduce pollution.
it focuses solely on reducing greenhouse gas emissions.
it encourages voluntary industry compliance without imposing regulations.
it sets stringent emissions limits and standards for various pollutants and sources.
multiple choice 4 points
what is the flexibility of the scientific method?
it can be used to draw conclusions
it can be used to analyze data
it can be used to gather data
it can be used in many different fields of science and in real life
multiple choice 4 points
during el niño, what happens to the surface water temperature in the tropical pacific ocean?
it disappears entirely.
it becomes warmer than usual.
it gets colder than usual.
it remains the same.

Explanation:

• Question 7: The Clean Air Act is a regulatory law. It sets strict limits and standards for pollutants (e.g., sulfur dioxide, nitrogen oxides) from various sources (like power plants, factories). Market - based mechanisms (e.g., cap - and - trade) are sometimes used in addition to regulations, but the core is regulation. It's not just about greenhouse gases (which is a subset of pollutants it may address), and it's not voluntary as it has legal mandates.
• Question 8: The scientific method involves steps like observation, hypothesis formation, experimentation, data collection, analysis, and conclusion - drawing. Its flexibility lies in its applicability across different scientific fields (biology, physics, chemistry) and real - life problem - solving (e.g., in engineering to test a new material). Drawing conclusions, analyzing, and gathering data are parts of the method, but the key aspect of flexibility is its wide - ranging application.
• Question 9: El Niño is a climate pattern. During El Niño, the trade winds weaken in the tropical Pacific. This leads to the warm water that is usually piled up in the western Pacific (near Indonesia) moving eastward. As a result, the surface water temperature in the tropical Pacific (especially in the central and eastern regions) becomes warmer than usual. The water doesn't disappear, and it doesn't get colder or remain the same in the context of this climate event.

Answer:

1. It sets stringent emissions limits and standards for various pollutants and sources.
2. It can be used in many different fields of science and in real life.
3. It becomes warmer than usual.