Grade 1 - A History Of The Earth

48 The History of the Earth: Supplemental Guide 2B | The Earth Inside-Out, Part I

in conjunction with the complex text presented in the read-alouds.

There may be variations in the sentences created by your class.

Allow for these variations and restate students’ sentences so that

they are grammatical.

1. Conjunctions are a kind of word we use to connect words and
   phrases.


2. We use the conjunction or to join words and phrases that are
   different possibilities or choices.


3. Listen to Gerry the Geologist’s sentences about the earth’s
   crust from the read-aloud. I will emphasize the word or as I
   read his sentences to you:
   I dug this hole to show you that there are different layers of
   soil and rock beneath your feet. The farther you go into the
   earth, the more things change. The dark soil on top is fairly
   easy to dig into with a shovel, but the deeper layer of clay is
   harder to dig because it has been compacted—or squished—
   by the weight or pressure of everything above it.


4. Notice that in this paragraph, Gerry the Geologist uses the
   word or when he talks about two possibilities why the layer
   of clay is harder—the clay has been compacted or squished.
   Gerry also talks about two possibilities how the clay got
   squished—by weight or pressure.


5. We hear the word or when making choices:
   Would you like a red crayon or a blue crayon?
   The word or tells us that we must choose only one crayon.


6. Let’s listen to another example:
   Do you prefer chocolate ice cream or vanilla ice cream?
   The word or tells us that we must make a choice and choose
   one ice cream fl avor.