Science Experiments

Archive for August, 2006

Question: School chemistry help please?

Okay in a rates of reaction experiment, which amounts of sodium thiosulphate and hydrochloric acid (respectively) will work best in providing desired results and why?

50cm^3 and 10cm^3

50cm^3 and 5cm^3

40cm^3 and 10cm^3

40cm^3 and 5cm^3

Thanks! Don’t forget to justify your answer! xxxx

Answer: It’s hard to tell!
What is the Na2S2O3 reacting with; it’s not the HCl; that’s probably only the pH determinant or the catalyst. The Na2S2O3 requires something to change it to (the usual) Na2S4O6 (sodium tetrathionate).

Chemistry Music Video 22: Rate Of Reaction

Question: Where can i find experiments to carry out for a 10 year old at home?

honeschooling my 10 year old i am having trouble finding adequate and free ideas of science exeriments and projects in other subjects. Is there not a site that is accessible to homeschoolers and parents that offers such information?

Answer: The local library has several books on Science Experiments and science projects (like you would do for a science fair.) If you can’t find any online resources for your experiments, I would make a trip to the library.

http://www.all-science-fair-projects.com/

8th grade Science Projects and Science Experiments

Question: science help thank you so much ill rate u bestt?

16. What is an organized plan for gathering, organizing, and communicating information called?
A. an observation
B. a hypothesis
C. the Scientific Method
D. a technology plan

17. The goal of the Scientific Method is to _________________ or to help people better understand an observed event.
A. solve a problem
B. form a hypothesis
C. perform an experiment
D. define scientific laws

18. Which of the following is NOT an International System of Units base unit of measurement?
A. meter (m)
B. candela (cd)
C. second (s)
D. minute (min)

19. Meters are used to measure ____________.
A. mass
B. time
C. length
D. Pressure

20. Kilograms are used to measure ____________.
A. height
B. mass
C. time
D. volume

Answer: 16.C
17.A
18.D
19.C
20.B

Paul’s Comments About GEET FREE PLANS