Ninth Grade Science Projects (Page 61)

Pluck Out & Pick New String Materials for Your Guitar

Science Fair Project Idea

Scientific Method

Walk into any music store and you'll find a dizzying array of string choices for your classical guitar, including rectified nylon, clear nylon, carbon fluoride, bronze wound, phosphor bronze wound, silver-plated copper wire, Polytetra-flouro-ethylene (PTFE), each in a range of tensions from low to high. There is no single best brand or best material. All have their advantages and disadvantages. A set of strings that sounds "sparkling" on one guitar might sound dull on another, primarily because… Read more

How Clean is Your State's Energy?

Science Fair Project Idea

Scientific Method

Where does your electricity come from, and how does it affect the environment? In this project, you will use data on electricity generation from power plants across the United States to compare the fuel sources and emissions from power plants in one state to national averages. You will also examine past trends and use them to estimate how the state’s fuel mix and emissions might change in the future if recent patterns continue. Read more

Solving Logic Problems

Science Fair Project Idea

Scientific Method

You may know Lewis Carroll as the author of Alice in Wonderland, but did you know that in real life he was a mathematician who studied symbolic logic and logical reasoning? How can math help you solve Lewis Carroll's Logic Game? (Bogomolny, 2006) How are algorithms for solving the game Sudoku similar to solving a logic problem? (Hayes, 2006) For the super-advanced mathematical genius, try to evaluate currently available, logic-based computational tools, or design a better one!… Read more

He Huffed, and He Puffed, But Didn't Blow the House Down! How Can Straw Make a Sturdy Building?

Science Fair Project Idea

Scientific Method

In the fairy tale of the three little pigs, the wolf huffed and puffed and blew down the first pig's straw house. But in reality, straw, tied into bales, is a viable building material that, when used properly, makes sturdy and energy-efficient buildings. Straw is a renewable resource that is available all over the world since it is the byproduct of growing grain. In this science fair project, you will test a straw bale covered with stucco to see if it's water resistant, and evaluate if it's… Read more

Measuring Height Or Distances with a Camera

Science Fair Project Idea

Scientific Method

If you know or calculate the field of view for your camera, you can use it to measure distances and the height of almost anything. It's all a matter of basic trigonometry. Read more

Soft Robots with Built-In LEDs

Science Fair Project Idea

Engineering Design Process

Check out the soft robotic gripper and artificial robotic skin projects. These projects show you how to use flexible silicone rubber to make robots or robotic parts. The second project shows you how to connect external LEDs using an Arduino. The LEDs light up when an embedded piece of conductive fabric stretches. What about embedding LEDs in the silicone rubber? You can do this by embedding the LEDs between layers of silicone (Figure 1). The trick is to solder flexible stranded wires to the… Read more

How do Mountain Ranges Affect Weather?

Science Fair Project Idea

Scientific Method

Many continents contain large mountain ranges that divide the continent into different regions. In the U.S. the Rocky Mountains mark the continental divide. The presence of a large mountain range can have a big effect on seasonal weather patterns. Also, the weather and climate on one side of a mountain range may be very different from weather and climate on the other side of the range. In the case of the Rocky Mountains, the western slope and eastern slope each have very different climates… Read more

Fractals

Science Fair Project Idea

Scientific Method

A fractal is, "a rough or fragmented geometric shape that can be subdivided in parts, each of which is (at least approximately) a reduced/size copy of the whole" (Mandelbrot, 1982). There are many different fractal patterns, each with unique properties and typically named after the mathematician who discovered it. A fractal increases in complexity as it is generated through repeated sets of numbers called iterations. There are many interesting projects exploring fractal geometry that go beyond… Read more

Lunar Crater Counting

Science Fair Project Idea

Scientific Method

Get good photographs of the Moon showing lots of craters and count how many craters you find in a range of diameter classes. One useful source is the Consolidated Lunar Atlas (Kuiper et al, 2006). Make a histogram that shows the distribution of diameters. Most of these craters were formed during the first billion years of the Moon's formation, but you should confirm that this is true for the the Moon areas you've selected in your photographs by doing background research. Is cratering uniform… Read more

Free Lunch? Can Solar Energy Systems Pay for Themselves with Utility Bill Savings?

Science Fair Project Idea

Scientific Method

If you are interested in exploring how renewable energy can improve the environment, this project could be for you. You'll take on a real-life engineering challenge: deciding whether the benefits of a renewable energy technology are worth the cost to implement it. Some sample questions are suggested, but you can also come up with your own question that matches your specific renewable energy interest. Is there such thing as a free lunch? Read more

Ninth Grade Science Projects (635 results)

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