Vocabulary and Concept Development

EDI

Standard: 1.4 Students will identify common roots and affixes derived from Greek and Latin and use this knowledge to analyze the meaning of complex words (e.g., international).

Learning Objective

• I will know common roots and affixes derived from Greek and Latin and use this knowledge to analyze the meaning of complex words.

Activating Prior Knowledge• Have you heard the word

transportation?

• The word transportation has the prefix trans-.

• Can you see the prefix inter- in intermediate?

• What does intermediate mean?

Concept Development• inter-: Latin prefix meaning between or among: the second element of the compound is singular in form.

• trans- : Latin prefix meaning on the other side of, to the other side of, over, across, or through .

• inter- : Prefix from Latin meaning “between.”

• trans- : Prefix from Latin meaning “across.”

Tell your partner what

the prefix inter- means.

The prefix inter- comes

from Latin meaning

“between.”

Tell your partner

what the prefix trans- means.

The prefix trans- comes from Latin and

it means “across.”

Read the following prefixes:

trans-acrossLatin

inter -betweenLatin

Importance

• Have you ever been confused about a word and have not been able to figure out its meaning?

• Have you ever had to use knowledge of word meaning to figure out the meaning of a new or difficult word?

Skill Development• Read these words:

interval

transmit

interactive

transfusion

intersect

transact

transfer

interfere

intermittent

• Read these definitions / synonyms:

The movement of blood from one person to another

To do or carry on business

To move or change from one place to another

Off-and-on, stop-and-start

To send from one person or location to another

To come between

Time and space etween two events or objects

• Match the words with the correct definition or synonym:

interval

transmit

interactive

transfusion

intersect

transact

transfer

interfere

intermittent

The movement of blood from one person to another

To do or carry on business

To move or change from one place to another

Off-and-on, stop-and-start

To send from one person or location to another

To cut or pass through, to cross

Time and space between two events or objects

Able to act back and forth between people and things

To come between

Answer these questions:

1. What does the prefix trans- mean?2. What does the prefix inter-mean?3. What does transfer mean?4. What does transfusion mean?5. What does intersect mean?6. What does interfere mean?

Identify the prefixes.

• interactive• interfere• intermittent• intersect• interval• transact• transfusion• transmit• transfer

Guided Practice

Meaning in ContextUse the words in the box to fill in the blanks in the following paragraph.

intermittent transmit interactive interval

Serena sat at the computer, working on an (1) _________ science program that responded each time she entered the answer. At the end of the program, she pressed SEND to (2) _________________ her work to her teacher. She thought that after a short (3) _______________ she would see her score on the monitor. But instead, her computer program began making an (4) _______________ beeping sound, a sure sign that she was not finished yet.

interactive

transmitinterval

intermittent

Closure

• The prefix inter- means –

• The prefix inter- comes from Latin meaning “between.”

• The prefix trans- means –

• The prefix trans- comes from Latin and it means “across.”

Independent Practice

Match the bolded word with the best synonym:

1. lines that intersecta. cross b. curve c. parallel

2. to transfer studentsa. teach b. grade c. move

3. a blood transfusiona. transfer b. loss c. clot

4. to interfere ina. perform b. sing c. meddle

5. to transact businessa. do b. lose c. look for

ExtensionYou met the word intersect in this lesson. You know that inter- means “between.” The “sect” part of intersect is derived from the Latin word sectare, meaning “to cut.” Two streets that intersect “cut through” each other. The root sect also appears in the words bisect, trisect, and section.

Look at the words in the first column. Using your knowledge of word parts, find the correct meaning for each word in the second column. Then write its letter on the line before it.

1. __ bisect2. __ trisect3. __ section

a. to cut into three partsb. a piece, cut from somethingc. to cut into two parts

c

a

b