Significant figures are used to express the precision of measurements.

Water expands when heated at all temperatures.

Objects in free fall accelerate at different rates independent of their mass.

A hypothesis is a proven scientific fact.

The speed of sound increases as temperature decreases in air.  

Magnetic fields can exert forces on moving charges.  

The refraction of light causes mirages due to frequency. 

The Curie temperature is the temperature below which a material becomes ferromagnetic.  

Energy can be destroyed but not created.

Ohm’s Law applies to all materials.