Question 1

Which of the following is NOT a property that all living things must display simultaneously to be considered alive?

Accepted Answer

Ability to photosynthesize

Question 2

A scientist is testing a new drug. In a double-blind study, who knows which subjects are receiving the drug and which are receiving a placebo?

Accepted Answer

Neither the test subjects nor the researchers

Question 3

Which of the following best describes the process of science as outlined in the study materials?

Accepted Answer

A cycle involving exploration, testing, communication, and outcomes

Question 4

Which subatomic particle is responsible for the chemical properties of an element?

Accepted Answer

Electron

Question 5

An atom of carbon-14 has 6 protons and 8 neutrons. What is its mass number?

Accepted Answer

$$14$$

Question 6

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 7

Which type of chemical bond involves the sharing of electron pairs between atoms?

Accepted Answer

Covalent bond

Question 8

Sodium (Na) and chlorine (Cl) form sodium chloride (NaCl) through which process?

Accepted Answer

Transfer of electrons to form an ionic bond

Question 9

Water is considered a polar molecule because:

Accepted Answer

It has an uneven distribution of electrons, resulting in partial charges

Question 10

Which property of water allows a water strider to walk on the surface of a pond?

Accepted Answer

Cohesion and surface tension

Question 11

Why does ice float on liquid water?

Accepted Answer

Hydrogen bonds cause water molecules in ice to be spaced farther apart

Question 12

Which of the following best explains why sweating cools the human body?

Accepted Answer

Sweat absorbs heat as it evaporates due to hydrogen bonding

Question 13

A solution with a pH of 3 is how many times more acidic than a solution with a pH of 6?

Accepted Answer

$$1,000$$ times

Question 14

Which of the following is a real-life example of a buffer in biological systems?

Accepted Answer

Blood maintaining a stable pH despite addition of acids or bases

Question 15

Which of the following best describes an acid?

Accepted Answer

A compound that releases $$\mathrm{H}^+$$ ions into a solution

Question 16

If a solution has a high concentration of $$\mathrm{H}^+$$ ions, what can you infer about its pH?

Accepted Answer

It has a low pH

Question 17

Which of the following scenarios best demonstrates the application of the scientific method?

Accepted Answer

A doctor forms a hypothesis about a new treatment, tests it, analyzes the results, and shares findings with the medical community

Question 18

Which of the following best explains why water is called the 'solvent of life'?

Accepted Answer

Water can dissolve a wide variety of substances due to its polarity

Question 19

A researcher is designing an experiment to test the effect of a fertilizer on plant growth. Which of the following is the best example of a control group?

Accepted Answer

Plants that receive no fertilizer

Question 20

Which of the following best describes the relationship between atoms, elements, and compounds?

Accepted Answer

Elements are made of atoms, and compounds are made of two or more elements in a fixed ratio

Foundations of Biology: The Study of Life and Essential Chemistry

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