WW6 Lesson 15

Replace the phrase in bold with a single word or form of the word from lesson 15.

I became worried about what might have happened when i didn't hear from you.

• apprehensive

• exist

• trace

• coincide

Replace the phrase in bold with a single word or form of the word from lesson 15.

On a series of steps numbered from one to ten, the judges rated the performance a seven.

• scale

• envelop

• mere

• revolve

Replace the phrase in bold with a single word or form of the word from lesson 15.

Extreme heat and pressure cause the metal plates to join together as a single sheet.

• fuse

• analyze

• velocity

• solar

Replace the phrase in bold with a single word or form of the word from lesson 15.

A microscope revealed very small amounts of bacteria in the water.

• trace

• compose

• disk

• mere

Replace the phrase in bold with a single word or form of the word from lesson 15.

The moon travels in a circular path around Earth once every 27.3 days.

• revolves

• exists

• fuses

• solars

Replace the phrase in bold with a single word or form of the word from lesson 15. About a hundred pairs of condors still are to be found in the wild in the United States.

• exist

• coincide

• extraordinary

• revolve

Replace the phrase in bold with a single word or form of the word from lesson 15.

Mozart began creating musical works when he was five years old.

• composing

• enveloping

• fusing

• tracing

Replace the phrase in bold with a single word or form of the word from lesson 15.

Some of the energy that provides my house with electricity is from the sun.

• solar

• extraordinary

• scale

• velocity

Replace the phrase in bold with a single word or form of the word from lesson 15.

To find the speed at which something travels, you need to know the distance traveled and time taken.

• velocity

• disk

• analyze

• scale

Replace the phrase in bold with a single word or form of the word from lesson 15.

Because our birthdays occurred on the same day, we decided to throw a party together.

• coincide

• envelop

• exist

• compose