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Grade 3 Science Ch 4
Study Guide
| Question | Answer |
|---|---|
| A living thing is called an ____________. | organism |
| The smallest living part of an organism is a __________. | cell |
| A tool used to see things that are very small is a | microscope |
| A single-cell organism that looks like a blob of jelly and lives in water is an __________. | amoeba |
| The control center of a cell that direct the cell's activities is the ________. | nucleus |
| The jelly like fluid that surrounds the nucleus and includes the parts that help the cell live and grow is the _________. | cytoplasm |
| the thin covering that holds the cell together is the ___________. | cell membrane |
| the stiff layer on the outside of a plant's cell membrane; provides shape and support for the plant is the __________-. | cell wall |
| what is the main difference between an animal cell and a plant cell? | A plant cell has a wall and an animal cell does not |
| A group of cells doing the same kind of work is call a ___________. | tissue |
| Tissue that allows your body to move is ___________ tissue. | muscle |
| Tissue that carries messages between your brain and your body is ____________ tissue. | nerve |
| A group of tissues working together to do a job is callen an __________. | organ |
| What are two kinds of tissues found in your body? | muscle tissue and nerve tissue |
| A group of organs working together to do a job is called a __________. | system |
| Muscles and nerves are made up of _____________ | tissues |
| Lungs, heart, stomach and brain are ________________ | organs |
| The tongue, esophagus, stomach, intestines, and liver are part of the digestive ______________. | system |
| The prints made by the ridges on your fingertips are called ___________. | fingerprints |
| What are four organs of the human body? | lungs, heart, stomach and brain |
| What is the largest organ of the body? | the skin |
| What are the layers of the skin? | epidermis and dermis |
| The top layer of skin that makes new skin cells and where old, dead skin falls off is called the ____________. | epidermis |
| The coloring in your skin is called ____________. | melanin |
| The second layer of skin that contains nerves, blood vessels, sweat glands, and oil glands. | dermis |
| Tiny pathways that carry messages between the brain and other parts of the body are called ___________. | nerves |
| God made __________ as a protection for your body. | skin |
| the epidermis keeps out harmful things such as __________. | germs |
| Thin tubes that carry blood around your body are called _____________________. | blood vessels |
| Blood vessels help keep your body at a constant ____________. | temperature |
| When you get hot, your blood vessels get ____________. | wider |
| Blood vessels carry ____________ and nutrients to all parts of your body | oxygen |
| When you get hot, you ______________. This cools your body. | sweat; sweat glands move the sweat to the skin's surface. |
| The body releases the sweat from tiny opening in the epidermis called ____________, | pores |
| Each strand of hair starts in a ________________- in the dermis. | hair follicle. |
| Hair is made up of dead ____________. | cells |
| Near the base of each hair is an _________ gland. These glands release oil, which help protect the body. It keeps you skin soft. | oil |
| When you get cold, the blood vessels become ____________. | narrower |
| What do nerves allow you to do? | nerves allow you to feel; and protect you from injury |
Created by:
Bonnie Daniel
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