Science Experiments

Posts Tagged ‘lab experiments’

Question: Can anyone recommend a good lab book for middle school science?

Something very hands on, but easy prep and chemicals (etc).
This would be for a7th grade life science class. Don’t mind spending a little money if it’s good with lot’s of experiments.

Answer: i know this is for 6th grade but it is advanced and it is really really good!!!!!!!!!!!!!

Middle School Science Fair Projects Made Fun

Question: What happens to the rats after scientist are done using them for lab experiments?

Do the scientist release the rats in the sewers? Do they give the rats to the snakes? Do they dump the rats in the lake? Do they buried the rats and offer it a safe trip to heaven?

Answer: As far as i know those animals used for testing must be put down after the experiment.

After the experiment is done they are put to sleep in a quick humane way. This is good because if these animals did suffer during the experiment than they are not made to suffer for the rest of their lives. Also those scientific experiment that make animals suffer must go through a rigorous testing of their methods before the government allows them to take real animals.

So the answer to your question…they’re put down.

Lab experiments

Question: My Physics Lab?

Sorry to bother you all…
I need help figuring out how to go about producing an experiment that answers this question.

“How much heat/watt does an incandescent bulb produced? How does the heat /watt vary with the wattage of the bulb?”

Does anyone have any ideas? I’m confused on what this stuff means because we never covered this during the school year. This serves as a substitute for a final exam and every kid gets a different question so all of the questions are kind of outside the curriculum…

Answer: Well the problem is the experimental setup!

Here it goes……
You’ll will need a box/container wuth ahole at the bottom big enough to accomodate the wires, to keep the incandescent bulb.

Keep the bulb in the lower portion. Divide the box into 2 compartment by a metal plate (it would be excellent if its copper)

Fix the plate touching the bulb from above and seal it so that water poured from above wont leak.

Also seal the bottomside of the box by cotton, felt etc.

The box acts as an insulated chamber.
Take a measured quantity of water at room temperature and pour it in the top chamber.

Put the bulb on. Wait for some time to let the system reach a steady state, keeping the voltage constant.

Since you know the initial temperature, quantity of water , you’ll find the temperature of the water now and calculate the heat gaind by water (Q) as:
Q = m*s*dT
m=mass
s = specific heat capacity of water
dT = temperature change.

Keep on varying voltage, and calculate Q every time.

You will get the answers required!

Kids Marshmallow Experiment