Archive for February, 2007
Question: science questionsss please help mee!?
in an experiment, the ____ is the group where you keep all conitions constant.
How do you find the volume of a reularly shaped solid?
What do you do to convert kilograms to pounds?
The unit for volume is _____or_____
Changing from a liquid or gas is______ and a gas to liquid is_____
The unit for length is___
What is the unit for density?
What is the unit for mass?
What unit is a graduated cylinder measured in?
What is the density of pure water?
Experiments At Home: Liquid or Solid?
Question: What would be a good science/health experiment, involving smell or the nose?
There is a big Science/Health fair project coming up. My topic is the nose. We are given a tri-fold, and we write a poem about our topic, 3 paragraphs,and we need a short 1 minute demonstration or experiment to show our audience about our topic. Classes (K-5) will come in our classroom and watch. I would like a pretty interactive demonstration/experiment. Any Ideas?
All Answers are HIGHLY appreciated!
Answer: You might be able to find some ideas at one of these sites:
Science Answers: Why Does Popcorn Pop?
Science Experiment Method: Seed Germination Experiments
Preparing the Petri dish with paper towel for Seed Germination experiments
Cut a piece of paper towel to a size that covers the bottom of the Petri dish.
Moisten the paper http://www.science-experiments.info/Seed_Germination_Experiments.html#”towel in the Petri dish.
Scatter a precise number of seeds around the paper towel in the Petri dish. For example, scatter 25 or 50 seeds.
Take another piece of paper towel, cut it to the same size as the first paper towel.
Moisten the second paper towel that you recently cut and use it to cover the seeds in the Petri dish. If you are using saucers, turn one of them upside down and place it over the other one.
Observing and monitoring Seed Germination experiment process
Keep the seeds at room temperature for a few days. You want the seeds to be kept moist but not covered by water, so moisten both the top and bottom papers periodically.
Look at the seeds each day until all the seeds that are going to sprout have sprouted (not all seeds will germinate).
Observation and recording results
- Count the seeds that have germinated in your Seed Germination experiment and figure out the percentage of sprouted to unsprouted seeds.
- Use that percentage to decide how many seeds to plant in your main science experiment.
For example, if you want to grow 50 plants in your main science experiment and the germination test shows that 70 percent sprouted, then divide 50 by 0.70 (or 70 percent). That works out to be 71 seeds that you need to plant in each planter in order to get about 50 good plants in each.
Main Seed Germination Experiments
Main Seed Germination experiment tips.
- Remove the same amount of soil from each filled planter, enough to cover the seeds to a depth of about 1 centimeter.
- Scatter the seeds over the soil, then cover them with about 1 centimeter of the soil you removed.
- Carefully water the soil, trying to keep it evenly moist, especially during this period of Seed Germination. Use equal amounts of water for each planter.
Click here to go back to the Seed Germination Page.