Page 32 - ScienceStd4

No. Sign Meaning

(c)

FOR ONLINE READING ONLY

(d)

Vocabulary

Adolescent someone who is no longer a child but is not yet
an adult

Cell smallest unit that makes living organism

Expiration when a product is no longer safe to use because
its time has run out

Nutrients substances in foods that help our bodies work
properly

Obesity being overweight

Pathogens living things that can cause diseases

Pesticides chemicals used to kill or stop harmful bugs and
plants that can harm crops and animals

Rheum watery or sticky liquid that collects in the corners
of the eyes, especially when sleeping

Scalp skin covering the top of the head where hair grows

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