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Multiple-choice test questions can be confusing. Here's a toolbox of tricks and strategies to help your teen become a multiple-choice master.

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

In this science experiment, test the pH of soil surrounding a gas station to determine if gas stations have a negative effect on the environment.

Science fair project that demonstrates the principle of conservation of mass by conducting a chemical reaction inside a sealed Ziploc bag.

Science fair project that determines whether windmills can be designed so that birds will not feed on them. Will they discriminate between different patterns?

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

Determine the maximum distance traveled by projectiles launched at an angle. Use some cool math to figure out at which angle your projectile will go farthest.

In this science fair project on the relationship between distance and time, kids explore the behavior of gravitational acceleration through direct observation.

In this science fair project, students make their own rain gauge to measure rainfall.

Explore properties of liquids and how temperature and salinity effect surface tension of liquids in this fun- filled science fair project idea.

This project explores how well couples convey complex emotions such as envy and pride to one another solely through the sense of touch.

This science fair project investigates how temperature of a room affects the burn rate of a candle.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

Administer IQ tests to volunteers. have one group practice typical IQ test problems. Then compare results of the two groups.

Plant sunflower seeds , measure height, calculate average height, compare size and weight of heads. Interpret findings in detailed report.

Research information on vitamin content in foods, Examine the effect of vitamins, test organic samples of fruits, meats, grains for vitamin content.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

More height, more steep, more speed! This science project investigates whether there is a correlation between the height of the roller coaster and the slope.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

This cool electricity project teaches kids how connecting batteries in series vs. parallel circuits can contribute to different levels of voltage and amperage.

Science fair project in which you will stage an election campaign to determine whether people are more swayed by a positive ad or negative ad.

Science fair project which evaluates different athletic shoes in order to find out whether any of them affect a person's ability to run.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

Science fair project that compares the properties of different fabrics to determine whether natural or synthetic fabrics are better at wicking away moisture.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Salmonella and E.coli are common food contaminates. This experiment measures the time it takes for E.coli and Salmonella to reach hazardous levels in fish.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

How do search engines work? What makes various search engines different? This project delves into the world of web crawlers, caching, indexing and algorithms.

Science fair project that determines whether moths are attracted to one color of light more than others.

Evaluate the ability of a biodegradable dish detergent to increase the penetration of water in hydrophobic soils.