0
Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
What happens when you put a cell in salt water and why?
The inside of a cell and the outside of the cell are usually in equilibrium as far as salt is concerned. Water always follows salt.
If the outside has more salt, then water will follow it outwards. The cell will lose water and become shriveled.
Why do lemons float and limes dont?
Scientist think that lemons float because they have less density than limes. This is just observations that scientist have conducted, but they are still unsure.
Does krypton have economic value?
Yeah. It's worth $30 for 1 gram. That's a lot of money for a little bit of krypton. Yeah. It's worth $30 for 1 gram. That's a lot of money for a little bit of krypton. Yeah. It's worth $30 for 1 gram. That's a lot of money for a little bit of krypton.
What is the difference between an exact number and a measured number?
An exact number is something that cannot be simplified any further or expressed in any other way besides one. examples: 6 candles on the cake, 2 cups in the sink, 5280 feet in a mile. A measured number is something that you measure with a measuring device and record, and can be expressed in different ways. examples: someone is 5.76 feet tall, a pen is 3.10 inches long.
Explains locations of mountains, trenches, and volcanoes?
Mountains are formed by tectonic plate movements pushing crustal rocks together. Trenches are formed when one tectonic plate is forced beneath another, creating a deep depression in the ocean floor. Volcanoes are typically found at convergent plate boundaries or above hotspots in the Earth's mantle where magma rises to the surface.
The world supply of natural gas is not inexhaustible. It is not renewable and will eventually run out. Some estimates state that it will last less than 100 years at present usage.
No. It just means that what you hypothesized would happen didn't. You shouldn't change anything. A hypothesis is simply a guess on what will happen, so if your guess isn't true that's okay.
Qualitative Data
then clean it out and repeat but cap it this time quickly and tightly. ^^2nd part of experiment.
1. which of the 2 activitie models a more explosive eruption?
2. was the preassure greater inside the canister during the first or second activty? why?
3. what do the bubbles have to do with the explosion? how are they influenced by preassure?
4. If the vinegar were a more viscous substance, how would the eruption n=be affected?
What is the dependent variable in a temperature experiment?
The Temperature is the Independent Variable (50 degrees, 100 Degrees etc.)
Whatever happens as a result of the temperature change is the dependent variable.
The metal one - it is the best conductor of heat
Example of gravitational potential energy?
Any object that is above the chosen reference level (often this is the ground level) will have positive potential energy. Any object below the chosen reference level will have negative potential energy.
If the lithosphere moved less how would the surface of the earth be affected?
the pushed and pull of tectonic forces would decrease.
Yes. They have done cloning experiments on both people and animals (which we turn into food). It is possible. Whether it is ethical or not remains a question, and the cloning that has been done isn't like the Science Fiction movies where you can quickly clone an adult as an exact copy. The cloning technology that we have only clones small cells that grow into adults... and in the case of humans, if they perfect the process, the new human would be more like a twin... genetically identical, but with a separate personality and completely separate memories, etc.
Why do solids heat up faster than liquids?
Solids are more compact than liquids. The particles of a solid are closer together. Since heat is the kinetic force between particles, the closer those particles are the easier it is to excite them.
What are the steps for testing a hypothesis?
1)Ask a question
2)Make a hypothesis (predict what will happen with your experiment)
3)Research your hypothesis
4)Test your hypothesis
5)Collect/organized your data
6)Results
7)Draw a conclusion
Why do they call a snow storm a blizzard?
A blizzard is defined as having winds of more than 35mph, and enough snow to limit the visibility to 500 feet or less. A severe blizzard has winds of over 45 mph, visibility near zero and temperatures of -12C. The origin of the word is obscure, but came into general use in the US after the hard winter of 1880/1881. American/English linked the word to a 'violent blow' or a 'violent snow or rain storm'
How do you separate Glucose C6H12O6 from water?
Heat it to 100oC and boil the water. it should leave the glucose.
responding variable
The enzyme renin is responsible for the activation of what?
Renin is responsible for the activation of angiotensinogen into angiotensin I in the renin-angiotensin-aldosterone system, which plays a key role in regulating blood pressure and fluid balance in the body.
The volume of gas
How do you account the shortage of feldspar in the soil?
It is easily chemically weather, so it gone by the time a rock becomes a soil.
