Exploring vocabulary - Muschla Gary R. 2012

The powerful heart
Prefixes, I

Your heart pumps blood through your body. It never rests. About how many times does the average human heart beat each day?

To answer the question, complete each sentence with the correct word. Choose your answers from the words after the sentences. Write the letter of each answer in the space above its sentence number at the bottom of the page. You will need to divide the letters into words.

1. When not at home in the evening, we leave the lights on as a _____.

2. It is _____ to see bacteria without a microscope.

3. Interrupting people when they are speaking is _____.

4. Archeologists found ancient pottery and stone tools at the site of the _____ village.

5. Jessica was _____ where she had left her math book.

6. The teacher cautioned her students not to _____ any words on their stories.

7. It is helpful to _____ important words in your notes.

8. Riding a bicycle without a helmet is _____.

9. Many animals live in _____ nests and dens for protection against predators.

10. I am very organized and hardly ever _____ anything.

Answers

E. unsure

D. underline

R. prehistoric

S. unsafe

H. impossible

U. precaution

T. misspell

A. impolite

N. misplace

O. underground