BIO 1-2

What is the function of a buffer in a solution?

To resist changes in pH and maintain a relatively stable pH

Isotopes of an element differ in their number of:

Neutrons

Pseudoscience is best described as:

Claims that appear scientific but lack proper scientific support

Which four elements make up approximately 96% of the human body?

Carbon, hydrogen, oxygen, nitrogen

A covalent bond is formed when:

Atoms share electrons

In scientific terminology, a theory is:

An explanation supported by overwhelming experimental evidence

An ionic bond is formed when:

Atoms transfer electrons, creating charged ions that attract each other

Scientific thinking is best described as:

A flexible and adaptable process for understanding the world

In an experiment, the independent variable is:

The variable that the researcher manipulates or controls

A solution with a pH of 3 would be considered:

Acidic

An element is defined as:

A substance that cannot be broken down further into any other substance

A solution with a pH of 10 would have:

More OH- ions than H+ ions

The atomic number of an element refers to the number of:

Protons in the nucleus

The second and subsequent electron shells can hold up to:

8 electrons

The first electron shell (closest to the nucleus) can hold a maximum of:

2 electrons

What determines if and how an atom will bond with other atoms?

The electrons, particularly those in the outermost shell

What is replication in scientific studies?

Repeating experiments to verify results

In a double-blind experimental design:

Neither the subjects nor the researchers know who receives the treatment

In scientific terminology, a theory is:

An explanation supported by overwhelming experimental evidence