Word Work
Prefixes, suffixes, and root words
Ask students to define the words prefix, suffix, and root word. Explain that a root word is the a word that can stand alone. A prefix is a group of letters that can be added on to the front of a word to change its meaning. A suffix is a group of letters that can be added to the end of a word to change its meaning.
Write the word tie on the board. Have students define the word. Explain that the word tie is a root word. Now, write the letters re- in front if the root word. Have students define the new word. Next, add the suffix -ing. Have students define the new word.
Ask: What are some other prefixes and suffixes you can think of?
Write down students' suggestions.

Root Words - -ology Family
Explain that a root word is a word made up of parts. Often the root comes from another language.
Use the following example from the text.
Say: Volcanology is a word that is made up of the root volcano, and the suffix -ology, which is a Greek word meaning science of. It means the science of volcanoes. There are many other words in the -ology family. Ask: Can anyone think of some others?
Some hints many need to be given. For example:
The study of people and culture - anthropology
The study of animals - zoology
The study of life - biology
The study of applied science - technology
Introduce the second worksheet.
Explain that is related to the work covered on homophones and -ology words. 

Learning through Visual Devices
Read and interpret a diagram.
Point out the diagram showing pyroclastic flow and eruption cloud.
Explain to students there are features of diagrams that make them easier to read and get information from. These features might include:
Title - Tells what the diagram is about.
Labels - Identifies different parts of the diagram Using these features, have students suggest information they can see in the diagram.

Ask: Using the features we have talked about, what information can you see in this diagram?

Writing Link
Have students choose one -ology word to research further. They may need to visit the library or use the Internet or a dictionary. Have them write up the word, a definition of the word, and any other information they find.

Assessment
Monitor students' responses in the Comprehending the Text section to assess how well they understand the text.
Monitor reading to see if they are using the effective reading strategies.
Assess students' knowledge of homophones and -ology words.