BJU Science Grade 3 Chapter 4 (5th edition)

A tool used to see tiny things

• an amoeba

• a microscope

• a telescope

a living thing is called an organism

• true

• false

The smallest part of a living organism is an organism

• true

• false

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A thin covering that homds a cell together is cytoplasm

• true

• false

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The control center of a cell that directs the sell's activities is the nucleus.

• true

• false

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A group of organs working together to do a job is called a

• tissue

• nerve

• system

• muscle

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A group of cells all doing the same kind of work is called a ______.

• muscle

• nerve

• tissue

• system

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The top layer of skin is called the _____.

• dermis

• epidermis

The heart, lungs, stomach, and brain are all

• organs

• systems

• tissues

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The prints made by ridges on your fingertips are called

• dermis

• epidermis

• fingerprints