## Simple Machines: Science Activity for Kids 3

This week for STEM Friday we have physical science activities inspired by the new book:  The Kids' Book of Simple Machines: Cool Projects & Activities that Make Science Fun!by Kelly Doudna.

The Kids' Book of Simple Machines is the perfect hands-on science book for early elementary-aged children. It has concise explanations of the science of simple machines,  clear step-by-step instructions, and enticing colorful photographs of the projects. In addition, the background information in the different sections introduces children to famous scientists and inventors, from Archimedes to the Wright brothers.

The six simple machines covered are the lever, pulley, inclined plane, wedge, wheel and axle, and screw. After a brief introduction to each type in the front, the following chapters give more in-depth information, numerous examples of the different simple machines, and several activities and projects to explore the concepts more fully.

Whether you are teaching science in the classroom, after school, or at home, The Kids' Book of Simple Machines is a well-designed and useful resource. The young makers of the world are going to have hours of fun trying out the activities in this book.

### Related Activities:

1. Archimedes Screw

One of the simple machines from the book is the screw.

(Public domain image from Wikimedia)

A screw is an inclined plane wrapped around some sort of central core. In addition to holding pieces of metal or wood together, screws can also be used to move objects. Propellers are types of screws that help move boats through water or airplanes through the air.

One of the earliest examples of a screw being used to move things was invented by the Greek scientist Archimedes. We all know that water moves down slope because of gravity. Archimedes figured out a way to move water against gravity using a device that now bears his name, the Archimedes screw.

Instructions for making an Archimedes screw may be found at:

2. Simple Machines Quiz

After reading this introduction to simple machines at Idaho Public Television,  figure out what kind or kinds of simple machines are illustrated here  (Public domain images are from Wikimedia).

Answers are at the bottom of the post.

A. What kind(s) of simple machine(s) are these scissors?

C. What kind of simple machine is an adze?

D. How about this press, which might be used to squeeze the juice out of apples?

Learn more with The Kids' Book of Simple Machines: Cool Projects & Activities that Make Science Fun!by Kelly Doudna

Age Range: 5 - 9 years
Grade Level: Kindergarten - 4
Paperback: 144 pages
Publisher: Mighty Media Kids (August 25, 2015)
ISBN-10: 1938063597
ISBN-13: 978-1938063596

Disclosure: The book was provided by the publisher for review purposes. Also, I am an affiliate with Amazon so I can provide you with cover images and links to more information about books and products. As you probably are aware, if you click through the highlighted title link and purchase a product, I will receive a very small commission, at no extra cost to you. Any proceeds help defray the costs of hosting and maintaining this website.

Come visit the STEM Friday blog each week to find more great Science, Technology, Engineering and Math books.

A. Scissors:  You are correct if you answered lever or wedge. Scissors are complex machines consisting of double levers and wedges (the blades).

B. Wheelbarrow:  Also a complex machine, a wheelbarrow combines a wheel/axle with a lever.

C. Adze:  The blade of the adze is a wedge.

D. Press:  The simple machine found in this press is a screw.

How did you do? If you'd like to learn more about simple machines, please let us know.

## Explore Gravity: With 25 Great Projects

Seems like it has been too long since we've done any science activities, so let's share a book for STEM Friday that is sure to get the scientific inquiries flowing. Explore Gravity!: With 25 Great Projects (Explore Your World series)  by Cindy Blobaum and illustrated by Bryan Stone is a new children's project book that helps budding physicists learn about why gravity is important and how it works. The best part is that it is filled with hands-on projects that can be done with easy-to-obtain objects, mostly from around the house.

What to like:  The instructions are clear and easy to follow. New vocabulary words are highlighted with bold font, and then defined in sidebar glossaries. There is also a complete glossary in the back, as well as an index (great for finding projects fast). Plus the projects are fun and some, like the marshmallow trebuchet, are sure to "launch" new projects

Studying the effects of gravity and weightlessness can be a blast for adults, too. Check out scientists investigating fluid movement in weightless conditions in this video from Science Friday. Note: some mention of the adverse effects of nausea are discussed briefly.

For a more advanced discussion of how gravity works and what it is, check out this video at How Stuff Works.

You can also do this by stretching out a bed sheet.

Explore Gravity!: With 25 Great Projects is a perfect way to investigate how gravity works and to inspire budding scientists.

Related activities:

At the Nomad Press Explore Gravity page, select activities in the lower left sidebar (you will need to scroll down to see it) and a link will come up for you to download free instructions to make a balance sculpture (mobile).

Making parachutes is a good way to explore the forces of gravity.

Making siphons is another way to explore gravity (Growing With Science Water Cycle, second activity).

Age Range: 7 - 9 years
Series: Explore Your World series
Paperback: 96 pages
Publisher: Nomad Press (November 1, 2013)
ISBN-10: 1619302071
ISBN-13: 978-1619302075

Disclosures:  The book was provided by the publisher for review purposes. Also, I am an affiliate for Amazon, and if you click through the linked titles or ads and make a purchase, I will receive a small commission at no extra charge to you. Proceeds will be used to maintain this self-hosted blog.

Come visit the STEM Friday blog each week to find more great Science, Technology, Engineering and Math books.

## 25 Items for a Hands-On Physical Science Activity Box

Are you prepared for some hands-on science at home? Summer is a great time for informal science and now is the time to get ready.

From experience, I recommend that you gather items and put together a box for children to use to explore physical sciences whenever the mood strikes. The items you supply don't have to be big or expensive. but if you have it on hand and gathered together, it won't take a minute to get started.

Here are some tried-and-true suggestions that will be sure to ignite your child's inner investigator. Have multiples of each item, and a set for each child you are working with. (Note:  These suggestions are for ages 3+ and always keep safety in mind.)

1. Paper and scissors - for paper airplanes, helicopters, bridges, drawing designs, recording data, etc., etc.

2. Plastic drinking straws to make into kazoos, atomizers, droppers, bridges, you name it

3. Paper towel tubes to make marble towers, airplanes

4. Manila file folders to make ramps, airplanes, etc.

5. Plastic garbage bags or cloth, bits of yarn or string, and action figures to make parachutes (parachute activity)

6. Wheels to make cars and/or toy cars to roll down ramps (inclined planes)

7. Marbles and small balls for marble towers, study what happens when two objects collide by playing marbles (relationships of mass and force)

8. Balloons to make cars, hover craft, drums, etc. (Suggestions for activities with balloons)

9. Magnets, a variety of kinds plus items to test, such as paper clips of different types, coins, the rocks below (Edit: magnet science activities)

10. Stop watch, watch with second hand, or other timing device

11. Flashlight - important tool for investigating shadows, light, how batteries work, etc.

12. Thermometer- alcohol or electronic/digital (for safety, do not use a mercury-based one)

13. Magnifying lenses to study surfaces of rocks, magnets

14. Prisms to investigate light (we got a very inexpensive crystal pendent that works to separate visible light into rainbows)

15. Aluminum foil - great for building boats or make a Leyden jar to study static electricity

16. Building blocks

17. Ruler - both for measuring and to use as a ramp (inclined plane), support, etc.

18. Toy boats to study buoyancy

19. Modeling clay to study floating and sinking, make fossils

20. Clean tin cans with all sharp edges removed (for tin can science)

21. Tape - all kinds, glue

22. Plastic soda or water bottles to make boats, cover with balloon and place in very warm water

23. Pencils, chop sticks, wooden skewers, dowels and/or craft sticks

24. Spools, pulleys

25. Some cool rocks or pebbles can become loads for cars and boats or be an introduction to geology

Pennies make good weights for the front of file-folder airplanes.