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Which of the following is NOT provided as a result of the valid research and observations recorded by scientists?

A. A better understanding of the physical world

B. The ability to predict possible outcomes affected by actions

C. The ability to prevent earthquakes and other natural disasters

D. The creation of various substances and technologies that enhance our world

Answer Explanation:

Scientists make observations, gather data, and complete research over many years in order to compile knowledge that will provide insight into future disasters, such as earthquakes, storms, and global warming. Although science can be used to predict earthquakes and other natural disasters, there is currently no way of preventing them from occurring.

Therefore, the Correct Answer is C.

Q #1: A chemistry experiment is performed to determine the effect of a nonvolatile solute on the boiling point of water. Three trials are performed in which 10 mg, 20 mg, and 30 mg of salt are added to 500 mL of distilled water. Each solution is heated on a hot plate, and the elevated boiling points are recorded. Determine the dependent and independent variables in this question.

A. The independent variable is the amount of salt, and the dependent variable is the temperature at which the water boils.

B. The independent variable is the amount of water, and the dependent variable is the temperature at which the water boils.

C. The independent variable is the temperature at which the water boils, and the dependent variable is the amount of salt.

D. The Independent variable is the amount of salt, and the dependent variable is the amount of water.

Answer Explanation

In a scientific experiment, the dependent variable is the condition that is being tested and measured. The independent variable is the condition that is being changed or controlled. In this example, the amount of salt is varied, and the boiling point of water is measured. Therefore, the independent variable is the amount of salt, and the dependent variable is the temperature at which the water bolls.
Q #2: Which of the following is NOT a characteristic of enzymes?

A. They change shape when they bind their substrates.

B. They can catalyze reactions in both forward and reverse directions.

C. Their activity is sensitive to changes in temperature.

D. They are always active on more than one kind of substrate.

Answer Explanation

Enzymes are substrate-specific. Most enzymes catalyze only one biochemical reaction. Their active sites are specific for a certain type of substrate and do not bind to other substrates and catalyze other reactions.
Q #3: Where is the scapula in relation to the olecranon?

A. Distal

B. Lateral

C. Ventral

D. Superior

Answer Explanation

The scapula, commonly known as the shoulder blade, is above the olecranon, commonly known as the elbow. Conversely, the olecranon is distal or inferior to the scapula.

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