[Music] do you ever find challenging words while you're reading I know I do I'm Mrs Mora today we'll learn to use word Parts like prefixes and suffixes to read and understand unknown words recently I've been reading about the great lakes and I've come across some difficult words here a word first let's Circle the prefixes a prefix is a word part added to the beginning of a word to change its meaning do you see a prefix it's i n in now let's Circle the suffixes a suffix is a word part added to the end of a word to change its meaning do you see a suffix it's i v e e this final e does not make the I say its long sound i instead it says I if most English words do not end with v when we hear V at the end of a word we spell it with a final e v e next let's mark the vowels in the root or base word vowels help us break words into syllables each syllable can have only one vowel sound which vowels do you see we see a since there is one vowel sound we expect to find one syllable in this middle part let's say the word Parts in bass if now let's say the whole word invasive is that a real word not quite let's make it a real word I think we pronounced the prefix and suffix correctly so let's look at this middle part let's try moving the S into this third syllable then a might say a instead of a let's try in vasive invasive that's a real word invasive is related to the word invade invade has the prefix i n meaning in or into and the Latin rote VA a d e meaning to go there are no suffixes together the these word Parts mean to go in or into invasive also has the i n prefix meaning in or into the letters b a s come from the root v a d e meaning to go then the i v e suffix changes the verb inv vade into an adjective a describing word so invasive is an adjective describing something that goes in or into a place invasive can describe a plant animal or disease that spreads quickly and harmfully in the Great Lakes invasive fish threaten the population of Native fish like lake trout and Lake sturgeon if you speak Spanish words like imaso or imbas can help you understand this word great work today keep reading and try the strategy the next time you find a challenging word [Music]