Here's a breakdown:

* Hypothesis: A proposed explanation for a phenomenon. It's a statement that predicts a relationship between variables.

* Testable: This means that there's a way to design an experiment or gather data that can either support or contradict the hypothesis.

Characteristics of a testable hypothesis:

* Specific: Clearly defines the variables and the relationship being investigated.

* Measurable: The variables involved can be quantified and measured objectively.

* Falsifiable: There's a possibility that the hypothesis could be proven false through evidence.

* Objective: The hypothesis is based on evidence and logical reasoning, not personal opinions or beliefs.

Example:

Hypothesis: Plants grow taller when exposed to sunlight.

* Specific: Identifies the variables: plant height and exposure to sunlight.

* Measurable: Plant height can be measured using a ruler.

* Falsifiable: The hypothesis could be proven false if plants grown in the dark grow taller than plants exposed to sunlight.

* Objective: Based on the observed relationship between sunlight and plant growth.

Non-testable hypothesis:

Hypothesis: The universe is governed by a supernatural entity.

* Not specific: The concept of a supernatural entity is not clearly defined or measurable.

* Not falsifiable: There's no way to prove or disprove the existence of a supernatural entity through experimentation or observation.

In summary: A testable hypothesis is the cornerstone of the scientific method, providing a framework for conducting experiments and gaining knowledge about the world.