Bio Unit 1 Review

Front

What makes a molecule polar?

Back

Molecules become polar when the electrons shared in a covalent bond don't spend equal time around both nuclei, resulting in one part of the molecule developing a slight positive charge and another part developing a slight negative charge.

Front

What is a quantitative observation?

Back

An observation based on direct measurements, such as counting or measuring, which provides numerical data.

Front

What are the steps of the scientific method?

Back

The steps include: Researchable question, hypothesis, experiment, conclusion, communication.

Front

What is required for a scientific explanation?

Back

A scientific explanation must be consistent with evidence, able to make accurate predictions, and be public and open to criticism (usually in the form of peer review).

Front

How many protons does oxygen (O) have?

Back

Oxygen has 8 protons.

Front

What is a covalent bond?

Back

A covalent bond is a type of chemical bond where two atoms share one or more pairs of electrons.

Front

Define 'hypothesis' in scientific research.

Back

A hypothesis is a testable prediction about the relationship between two or more variables.

Front

What is the difference between qualitative and quantitative observations?

Back

Qualitative observations describe characteristics or qualities, while quantitative observations involve measurements and numerical data.

Front

What is peer review?

Back

Peer review is the process by which scientific work is evaluated by experts in the same field before it is published.

Front

What is the significance of a control group in an experiment?

Back

A control group is used as a benchmark to compare the effects of the experimental variable.