Ninth Grade Science Projects (Page 33)

Interpreting Area Data from Maps vs. Graphs: An Experiment in Visual Perception

Science Fair Project Idea

Scientific Method

Graphical methods of data presentation are a key feature of scientific communication. This project asks the question, "What's the best way to compare the land area of states: a map or a bar graph?" You'll be measuring performance on two different visual discrimination tasks: comparison of areas vs. comparison of position on a common scale. Which method is more accurate? Which method is faster? This project will get you thinking about how to find the best way to communicate scientific… Read more

Invasive Species

Science Fair Project Idea

Scientific Method

Invasive species are organisms (either plant or animal) that have been introduced into a new, non-native area and spread rapidly in the new environment due to a lack of regulation by predators. Frequently, invasive species will out-compete native species for resources which can put native species at risk. This is an especially big problem for threatened habitat and endangered species, which are already at risk. Survey your area to document cases of invasive species invading a local… Read more

Investigate the Kinetics of the Color Changing Iodine Clock Reaction

Science Fair Project Idea

Scientific Method

The iodine clock reaction is a favorite demonstration reaction in chemistry classes that usually requires toxic or hazardous chemicals. During the reaction, two clear liquids are mixed, resulting in another clear liquid. After some time, the solution suddenly turns dark blue. The reaction is called a clock reaction because the amount of time that elapses before the solution turns blue depends on the concentrations of the starting chemicals. In this green chemistry project, you will use a… Read more

Investigate the Vitamin C Level in Bell Peppers During Various Stages of Ripeness

Science Fair Project Idea

Scientific Method

Vitamin C is a water-soluble vitamin that has many functions in the body. Vitamin C is needed to bolster the immune system. It is an antioxidant that protects LDL cholesterol from oxidative damage, and it is needed to make collagen, a substance that strengthens many parts of the body, such as muscles and blood vessels. Our bodies do not make vitamin C, so we must get it from dietary sources. Citrus fruits, carrots, avocados, and spinach all have vitamin C. Bell peppers, like the ones shown in… Read more

Investigating the 'Mpemba Effect': Can Hot Water Freeze Faster than Cold Water?

Science Fair Project Idea

Scientific Method

This physics project seems like it should have an easy answer. Instead, it turns out to be a great illustration of why it is important to base scientific conclusions on the outcome of controlled experiments. Things don't always turn out as we expect! Read more

Investigating the Role of Procedural Music in Video Games

Science Fair Project Idea

Engineering Design Process

Have you ever wondered about the various types of music in a video game you've played? You may not have paid much attention to the music, but its job was to enhance your gaming experience. In fact, the wrong kind of music can detract from the atmosphere of the game. Can you imagine the music in Mario KartTM playing in Street Fighter®? In a game, music can indicate many different things, such as a special or new event, shift of mood, or the arrival of a character. This kind of music is… Read more

Ion Thruster: Build an Ion Wind Rotor

Science Fair Project Idea

Scientific Method

Ion thrusters, also called ion engines (Figure 1), are a type of electrically-powered spacecraft propulsion. While they provide very low thrusts (and thus low accelerations), they can do so for very long periods of time using a very small amount of fuel. So, while not appropriate for escaping Earth's gravity like chemical rockets which are less efficient but generate higher thrusts, they are useful for deep-space probes or making small adjustments to satellite orbits. You can read more about… Read more

Is It OK to Cheat If Everyone Else Is?

Science Fair Project Idea

Scientific Method

Tests, homework, taxes, speed limits, sports: there's always the possibility of cheating. Design a survey to investigate attitudes about cheating. Are some kinds of cheating worse than others? Are there times when it is OK to cheat, or is cheating always wrong? Do people who admit to cheating have the same attitudes as those who don't? Read more

Is It Ripe Yet? Build a Circuit to Detect Ripe Produce

Science Fair Project Idea

Scientific Method

When you go to the supermarket, how do you pick out ripe fruits and vegetables? You might look at their size or color, or feel them for firmness. That might be easy to do when you pick out a half dozen apples, but imagine if you had to examine thousands of apples growing in a field, or strawberries coming down a conveyor belt getting ready for packaging. Suddenly, it is a lot harder to do yourself! What if a machine could pick and sort the produce for you? In this project, you will address part… Read more

Is the Gold in My Jewelry Real?

Science Fair Project Idea

Scientific Method

Have you ever wondered if a piece of jewelry is real gold or if it's just some ordinary metal alloy? It turns out that some metals have a unique property; even in small amounts, they can be toxic to some organisms, including algae, molds, fungi, and bacteria, although it often takes many hours to see an effect. Can this phenomena, called the oligodynamic effect be used to tell whether or not the gold or silver in a piece of jewelry is real? Do bacteria react differently to pure, plated, and… Read more

Ninth Grade Science Projects (633 results)

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