Unit 3 Lesson 7: Practice

Read this sentence. The green flag was the signal to start the race. Signal means:

• noise

• sign

• permission

• cancellation

If you collide with something while walking, you might:

• have lunch

• run away

• fall down

• be happy

Something achievable is:

• risky to do

• fun to do

• difficult to do

• possible to do

Another word for invariable is:

• intolerable

• repeatable

• unconscious

• unchanging

The opposite of obtainable is:

• A. unimaginable

• B. inaccessible

• C. invisible

• D. irresponsible

An area’s landscape might include:

• hills

• floor

• sky

• space

Many people are unaware that diamonds are formed thousands of feet below the Earth’s crust. The heat and pressure in the mantle alter carbon into the hard, transparent rock known as diamond. Volcanoes help make diamonds obtainable. Diamonds sometimes surface with volcanic magma that erupts with a jolt through the Earth’s surface. As the magma hardens, it covers the diamonds and changes the landscape dramatically. Mining and natural erosion release the diamonds from the magma.

In line 1, crust means:

• the outer part of the planet

• the hard covering on bread

• volcanic rocks

• diamond mines

Diamonds form in the mantle, which:

• includes the crust

• surrounds the core

• is between the crust and atmosphere

• is at the center of the Earth’s core

Many people are unaware that diamonds are formed thousands of feet below the Earth’s crust. The heat and pressure in the mantle alter carbon into the hard, transparent rock known as diamond. Volcanoes help make diamonds obtainable. Diamonds sometimes surface with volcanic magma that erupts with a jolt through the Earth’s surface. As the magma hardens, it covers the diamonds and changes the landscape dramatically. Mining and natural erosion release the diamonds from the magma.

When you alter (line 2) something you:

• store it

• bury it

• like it

• change it

Many people are unaware that diamonds are formed thousands of feet below the Earth’s crust. The heat and pressure in the mantle alter carbon into the hard, transparent rock known as diamond. Volcanoes help make diamonds obtainable. Diamonds sometimes surface with volcanic magma that erupts with a jolt through the Earth’s surface. As the magma hardens, it covers the diamonds and changes the landscape dramatically. Mining and natural erosion release the diamonds from the magma.

When you feel a jolt (line 4) you feel a:

• dull pain

• sharp jerk

• slight burn

• mild dizziness