They are added before a root word to change its meaning.​

​Ex. im + polite = not polite

You can use prefixes to figure out the meanings of difficult words.​

​Prefixes

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appetite - natural desire for food

deficiency - a lack of

immunity - ability to resist an infection

osteoporosis - a disease of the bones

susceptible - ​open to

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​Words to Learn

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​Guide Questions

1) Why does the body need different kinds of food?

2) Why are infants susceptible to diseases?

3) Why do adolescents need a balanced diet?

4) Why is proper diet important for pregnant women?

5) What nutrients do elderly people need?​

​Answers

1) The body needs different kinds of food for it to grow and develop properly.

2) Infants are susceptible to diseases because they can't eat differen kinds of food.

3) Adolescents undergo physical and mental development.

4) Proper diet is important because their babies are yet to be born.

5) Elderly people need less energy-giving foods.