SKILLS 1-25

On December 17, 1903, the Flyer ________ near Kitty Hawk, North Carolina, with Orville Wright as pilot.

• took off

• it took off

• taking off

• took it off

Comets are relatively small celestial bodies _______ up chiefly of dirt and icy materials.

• make

• made

• they make

• make them

Researchers have long debated about _______ moon Titan contains hydrocarbon oceans or lakes.

• Saturn's

• whether it is Saturn's

• whether Saturn's

• whether Saturn is a

The abrasevely action of the wind wears away softer layers of rock.

• abrasively

• wears

• softer

• layers

Answer explanation

abrasive

There are two way of making a gas condense: cooling it or putting it under pressure.

• way

• making

• condense

• putting

Answer explanation

ways

Researchers have discovered that the application of bright light can sometimes be uses to overcome jet lag.

• discovered

• application

• uses

• overcome

Answer explanation

used

Salmon migrations may include having to jump up waterfalls, swim up rapids, or climbing fish ladders at dams.

• migrations

• include

• climbing

• ladders

Answer explanation

climb

If a strike is called in violation of an existing contract between labor and management, its a wildcat strike.

• is called

• violation

• existing

• its

Answer explanation

it is

it's

Snapping turtles are easily recognized because of the large head, the long tail, and the shell that seems insufficiently to protect the body.

• easily

• large

• long

• insufficiently

Answer explanation

insufficient

The long string of genes making up a chromosome have been likened to a string of pearls.

• long

• making

• have

• likened

Answer explanation

has