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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
State were each mangroves are found in reference to the water?
state were each mangroves are found in reference to the water
A perfect positive correlation would be exactly 1; 1.00 means "0.995 or higher", which is quite strong indeed.
What makes a controlled experiment different from others?
A controlled experiment is different from others since it has the same amount of things except for only one variable. For example of a controlled experiment, If you have two plants and you want to see if it will grown better in sunlight or in darkness. So you put on in the closet and put the other one in a open window. You water and give both of them the same amount of soil, water, ferterizer. Except for the one variable which in this case is sunlight.
What is the procedure for mold growing on bread and cheese?
Step 2: Spray both slices very lightly with water
Step 3: Seal the slices in separate pieces of cling wrap or separate sandwich bags.
Step 4: Place the wrapped bread slices somewhere warm and wait for the mold to grow. Once the difference between the two slices is significant enough, remove them and inspect the results.
Step 5: Examine the mold colonies with a magnifying glass. Note that caution must be taken not to breathe in the dust from the mold colonies as it can cause medical complications.
What is Happening?
The mold colonies have ended up on the bread either from landing on the bread from the air, or as a result of being collected from the bench in the process of wiping. The difference in the quantity and types of mold present show that wiping the bread on the bench results in far greater mold growth as well as diversity.
Possible Extension: School Activity to Test Disinfectants
This bread mold experiment can be extended to test different brands of disinfectants. Student work benches such as those found in secondary school science laboratories are easily as dirty as a standard kitchen bench.
To test different brands of disinfectants, divide a standard school bench into sections, one for each brand of disinfectant. Clean the bench section in accordance with the instructions on the bottle of disinfectant. Then wipe the treated area with a slice of bread and keep the bread as previously described. Repeat this process for as many different brands of disinfectant as are available.
What type of light source produce descrete spectrum?
Any thin (low-pressure) sample of a gas with electric current flowing through it.
A good control would be ten mice given food with no vitamins added.
Why do you think Curd sets faster in summer than in winter?
The bacteria (Lactobacillus) needs warmth to convert milk to curd. So the setting of curd is faster in summer.
Northern British name for an inedible paste made from flour and water, used to seal a casserole dish or similar pot whilst baking. Place 8oz (225g) plain flour in a bowl and add 5 fl oz (150 ml) of cold water - it should be enough to make a soft but not sticky dough. Divide the dough into 4 and roll each piece into a cylinder about 9 inches (23 cm) long on a lightly floured surface. Now position these all around the rim of the casserole dish you want to seal - it doesn't matter what they look like. Place the casserole lid carefully on top, pressing down gently and making sure there are no gaps. You dish is now sealed and ready for the oven.
What was can you separate sugar from water?
You can separate sugar from water by evaporation of the water.
What keeps the proper conditions inside of a living thing?
Actually I can tell you are doing a school work sheet so the correct answer for the work sheet is ORGAN
Actually, before you lead another 7th grader astray, the answer is homeostasis.
Whoever made the second comment, you are correct! And this was not my question, but I am also doing a school worksheet and needed help. By the way, second comment, how did you know that the person who asked this is a 7th grader? Because I am too!
What conversion factor would convert between liters and milliliters?
one liter is 1000 milliliters so to get from liters to milliliters just multiply with 1000 and to get from milliliters to liters just divide by 1000 (or multiply by 0.001).
The whole system is in fact fairly easy:
you just need to know the meaning of the following prefixes:
dezi: 1/10
centi: 1/100
milli: 1/1000
No. It expands to fill any container it's in. If you pump it out of one container
and into a different one, it changes its shape to match the new container.
How do you build a transformer using a battery charger?
Ni-Cd , Ni-HM and other rechargeable batteries are in massive use now a days.
Let me not describe the use , importance and bla bla of the rechargeable batteries.
What we are going to talk about here is how to make simple battery charger circuit to recharge your rechargeable batteries.
Making a battery charger circuit is very simple , Simply step down the mains voltage using a step down transformer and convert the current into DC and stabilize it using a bridge rectifier circuit.
But you might not want to use a transformer in your circuit to maker your battery charger circuit small and handy.
If you don't want to use a a transformer to step down the mains voltage then you can also use a resistor and a capacitor to step down the voltage and stabilize it.
And you can see the circuit diagram of a battery charger below which is not using any transformer. Battery charger circuit diagram:So here is a simple battery charger circuit diagram:
Click on the image to enlarge it:
Battery charger circuit diagram
You can see the values of the components used below:
R1: 56 giga ohms resistor
R2: 220 Mega ohms resistor
C1: 105 Kilo pico farad , 250 voltage capacitor
D1: IN 4007 Diode
D2: Light emitting diode indicator
D3 : IN 4007 Diode
If you use the values of the components stated above the circuit can recharge a 3 voltage rechargeable battery , You can change the value of R1 and C1 to get recharge battery of more voltage.
What do v shaped contour lines mean when going uphill?
A gully or canyon. Since the lines follow a specific elevation above sea level, the closer lines are together the steeper the slope. And a 'V' formation on the lines indicates a narrow deep area surrounded on both sides by higher elevations, or a narrow ridge with dropoffs on both sides could have a similar shape on the map.
NOT REALLY
It indicates a valley!
