Science Experiments

Posts Tagged ‘experiment’

Question: Need fast help with a Volcano experiment ten points!?

Me and my friend have to do the volcano experiment for a science fair. We already tried lots of mixes but they wont explode over the top. All that happens is the bottle fizzes up. We need a mix that will explode without having to shake it or stir it. we already tried baking soda, vinegar, dish soap, warm water, and food colouring. Please help!

Answer: Baking soda, Vinegar etc are things of the past, though its safe. I am not sure if you can lay your hands on a chemical called Ammonium Dichromate, which when burnt produces a dazzling volcano. It has been used in classes as well for demonstration. Try this link…

http://www.practicalchemistry.org/experiments/ammonium-dichromate-volcano,56,EX.html

Fun Science Experiments : How to Blow Up a Balloon With Baking Soda & Vinegar

Question: Experimental variable and control variables in a science experiment?

im doing a science project, its about the average heart rates of people who regularly exercise vs. people who don’t exercise, when they are both simply sitting down in a chair. what would be the experimental variable and control variable in my experiment?

Answer: control: not sitting
experimental: sitting

Science Homework 5 – Variables

Question: What are variables in Science Experiments please help thanks so much?

what is a variable what are independent variables, controlled variables, and dependent variables. Can you give me examples of each please Thank you so very much

NB
Im doing an experiment to test the effectiveness of 3 different cleaners in removing red wine stain. what are the variables in this experiment Thanks

Answer: Independent: The factor you change. (The cleaner).

Dependent: The factor you measure. (How much stain the cleaner cleans).

Control: The factor you control. (The red wine stain). (You must keep the stain the same size or else it won’t be a fair test).

To get more marks (These will really help you to get an A or A*):

Continuous (whole numbers): The number of cleaners.

Descrete (Numbers including decimals): The amount of red wine stain to start with, and the amount left after applting the cleaners.

Catagoric (Word labels): The names of the cleaners.

Ordered (Things you can put in order): The cleaners in a list starting from the worst and ending with the best.

Science Experiment “Using Your Noodle” part 2