Under the microscope, the geologist marveled at the intricate steps of the hopper crystal.

As a seasoned summit-hopper, Maya planned her next route to bag three peaks in a single weekend.

The freight hopper rattled over the old bridge, its load of coal shifting with each jolt.

As a train hopper, he crossed the continent by stowing away on freight trains.

The hopper boys worked through the night to keep the grain flowing into the mill.

The geologist carefully collected hopper crystals from the cooling lava flow for lab analysis.