structure skills 1-8 basic

Air near the equator ............... a faster west-to-east motion than air farther from the equator.

• to have

• it has

• has

• having

About 4000 B.C., humans discovered that ........... obtained from special rocks called ores.

• metals could be

• the ability of metallic

• possibly metallic

• could metals be

...............aerodynamic design has contributed greatly to reducing resistance to motion.

• Improved

• It improves

• Improvement

• They improve

........... quickly after an animal dies.

• In the degradation of DNA

• Degrading DNA

• DNA degrades

• For DNA to degrade

The southern part of Florida is much warmer in the winter than the northern part, so more ............. to the south

• flocking tourists

• touring flocks

• flocks of tourists

• tourists flock

The Moon's gravity pulls water on the near side of the Earth toward the Moon, and this is what .............. tides to occur.

• the cause

• causes

• causing

• the cause of

............, they pick up fragments of rock which become frozen into the base of the ice.

• Glaciers move

• Glaciers moving

• They were glaciers

• As glaciers move

The tape measure first evolved from ........... used by the Egyptians.

• the chains measure

• the chains are measured

• the chains are measuring

• the measuring chains

A Typical Atlantic hurricane starts as a low pressure system near..............

• Africa coasts

• coast to Africa

• the African coast

• Africa has a coast

It is not clear whether the subdivisions of the neocortex..............units

• individual

• are individual

• they are individual

• individually