Grade 6 Prefixes and Suffixes worksheet from Smart-Kids, designed to help students practice word formation using prefixes and suffixes.

The task in the image involves creating new words by adding prefixes and suffixes to the given root words. Prefixes are added at the beginning of a word, while suffixes are added at the end. Below is the solution with explanations for each word:

Given Root Words:

1. prove
2. form
3. plane
4. serve
5. pose
6. ply
7. clean
8. plant
9. remember

Solution:

#### 1. prove
- Prefix: re-
- Suffix: able
- New Word: provable (meaning capable of being proven)

#### 2. form
- Prefix: un-
- Suffix: -ation
- New Word: formation (the act or process of forming something)

#### 3. plane
- Prefix: inter-
- Suffix: -ity
- New Word: interplanetary (relating to or involving multiple planets)

#### 4. serve
- Prefix: over-
- Suffix: -ance
- New Word: over-servance (excessive service or attention)

#### 5. pose
- Prefix: mis-
- Suffix: -er
- New Word: poser (someone who pretends to be something they are not)

#### 6. ply
- Prefix: multi-
- Suffix: -ing
- New Word: multiplying (the act of increasing in number)

#### 7. clean
- Prefix: de-
- Suffix: -ness
- New Word: cleanliness (the state of being clean)

#### 8. plant
- Prefix: re-
- Suffix: -ation
- New Word: replantation (the act of planting again)

#### 9. remember
- Prefix: fore-
- Suffix: -ful
- New Word: forgetful (tending to forget things)

Final Answer:

1. provable
2. formation
3. interplanetary
4. over-servance
5. poser
6. multiplying
7. cleanliness
8. replantation
9. forgetful

Boxed Final Answer:
\[
\boxed{
\text{provable, formation, interplanetary, over-servance, poser, multiplying, cleanliness, replantation, forgetful}
}
\]