Building a rainforest terrarium and determining where a soil horizon begins are two ecosystem project ideas. Building a rainforest terrarium takes two to three weeks to complete and is a group activity, and it is possible to determine where bits of plants become soil instantly in the soil horizon experiment.Know More
Building a rainforest terrarium requires a see-through container such as a glass fish bowl, sand, potting soil, a tropical plant such as a fern, construction paper and cling wrap. After rinsing out the container, add 1/2 inch of sand to the bottom of the container, followed by 1 1/2 inches of soil. The sand and soil should be spread out separately and evenly. The tropical plant is added next, along with another inch of dirt to secure it. Trim the plant if it sticks out of the top of the container. Fully soak the soil by pouring 2 to 3 cups of water into the container, and place construction paper animals into the container. Secure cling wrap over the opening of the container, place it in partial, direct sunlight, and track growth in the next two to three weeks.
To determine the soil horizon, first consider an environment, and make a hypothesis on how deep plant foliage goes before soil becomes more consistent. Next, push a shovel straight down into the soil without mixing the layers of soil, and then look into the hole. Use a ruler to measure where bits of organic material stop and soil becomes consistent. Repeat the experiment in different settings to learn about different environments.Learn more about Homework Help
Some ideas for a Rube Goldberg project include turning off a light, watering a plant, shutting a door or popping a balloon. Rube Goldberg was a cartoonist, author and sculptor who was an engineer during his early work years. He enjoyed drawing highly elaborate contraptions used to perform the most mundane tasks, and his sketches often included pieces and parts such as pulleys, gears, balls, boots, bath tubs and even live animals.Full Answer >
Some good ideas for a ninth-grade science project are an experiment to determine the effectiveness of teeth whiteners, ways to keep bread fresh longer, and what makes a clothes dryer more efficient. They do not require a large amount of time, and all references used to research project topics should be cited.Full Answer >
Some ideas for middle school science projects include finding out what plants grow in which soil pH level and discovering the electrical conductivity of certain soil types, says Live Science. Other science projects include discovering natural water filters and the most effective plastic wrap to prevent evaporation, according to About.com.Full Answer >
Easy projects for the 100th day of school can involve collecting or organizing things in groups of 100. For example, students can collect 100 items that have to do with topics discussed in class, such as 100 math problems, 100 books about a certain subject or 100 cool science facts.Full Answer >