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

The refraction of light causes mirages due to frequency. 

Energy can be destroyed but not created.

Ohm’s Law applies to all materials.