1.   If the temperature falls below a particular threshold, a warning light comes on.

2.   In response, body temperature falls, metabolism slows, and we prepare to drop off.

3.   Once air temperatures have fallen well below freezing point, frozen spray accumulates along the shore.

4.   The moors got higher, the weather worsened, and temperatures fell.

5.   The temperature had fallen below zero.

6.   The heating will kick in if the temperature falls below a certain level.

7.   Thus, once the reaction is complete, the temperature falls.

8.   Temperatures can fall very low during the night so some form of heating in the room where you sleep is advisable.

9.   As the temperatures fall, council workers are preparing for another winter gritting the roads.

10.   As the clouds rise higher, the air temperature falls below freezing and some of the droplets freeze into crystals.