Match the following concepts with their descriptions: metric system, strip chart, layout plan, probability, diameter.

Here are the matches for the given concepts:

1.1.1. Uses metres, litres, grams and degrees Celsius for measured quantities.
This describes the metric system.

$$\boxed{\text{metric system}}$$

1.1.2. A map of a section of a travelling route not drawn to scale.
This is a strip chart.

$$\boxed{\text{strip chart}}$$

1.1.3. A visual representation of the spatial arrangement of various elements within a property.
This is a layout plan.

$$\boxed{\text{layout plan}}$$

1.1.4. Events and numerical descriptions of how likely an event can occur.
This is probability.

$$\boxed{\text{probability}}$$

1.1.5. Double the distance from the centre of the circle to any point on its boundary.
The distance from the centre to any point on its boundary is the radius. Double the radius is the diameter.

$$\boxed{\text{diameter}}$$