Science Experiments

diagram

the variable that is purposely changed by the experimenter.

Its existence is the only independent variable. Anything else depends on the context of the study.

dependent variable

In most real life cases, limiting an experiment to only one independent variable makes the whole experiment a waste of time. More often than not there are several independent variables.

So no other variables influence your results.

It can be. If you are looking at the germination time under different conditions of temperature and humidity etc.

For discrete data, a bar chart. For continuous data a grouped frequency chart (histogram).

it is the thing in the expierement that you dont change

Sadly not because the average weight of a banana is 118 grams and the average amount of potassium in a banana is 422 mg and that is not enough potassium for the banana to burn purple due to all of the chemicals that make up a banana

Van Helmont's experiment aimed to demonstrate that plants gain mass primarily from water. However, he failed to account for other factors contributing to plant growth, such as soil nutrients and carbon dioxide from the air. Additionally, his methodology lacked controls and precise measurements, which limited the validity of his conclusions. Consequently, while he made significant observations, his experiment did not definitively prove his hypothesis.

Oh, what a wonderful project you have there, friend! How about a title like "Salt and the Egg: A Delicate Balance"? Or maybe "Finding the Perfect Salty Solution for Floating Eggs"? Remember, the most important thing is to have fun and enjoy the process of discovery!

Fewer trees grow at the top of a mountain due to the harsh environmental conditions found at higher elevations. Factors such as lower temperatures, reduced oxygen levels, stronger winds, and thinner soils make it challenging for trees to establish and thrive. Additionally, the shorter growing season and increased exposure to extreme weather events further limit tree growth at higher altitudes.

No, a mixture of pepper and water would not be considered a solution. In chemistry, a solution is a homogeneous mixture where one substance (the solute) is dissolved in another substance (the solvent). In this case, pepper does not dissolve in water, so it would not form a solution. Instead, it would be considered a suspension, where the pepper particles are suspended in the water but do not dissolve.

A red blood cell and sperm cell are similar in that they both carry something to their destinations, for example, red blood cells carry oxygen around the body while sperm cells carry genetic information into the egg.

When scientists share the results of their work with other scientists, this contributes to the development of science, and everybody benefits. Science is about increasing the knowlege that the human race has about the universe in which we live, and that can only happen when scientific findings are publsihed. In addition, scientists benefit by having the accuracy of their work checked by other interested scientists, and by having the further implications and possibilities of their work explored by other scientists. No one scientist can do everything by him or herself. Even Isaac newton, who was probably the greatest scientist of all time, made a point of thanking other people whose earlier work made it possible for him to make that advances that he made (or as he poetically put it, if I have seen farther than others, it is because I am standing on the shoulders of giants).

To find the volume of a steel marble, you can use the formula for the volume of a sphere, which is V = (4/3)πr^3, where r is the radius of the marble. Measure the diameter of the marble using a caliper, then divide it by 2 to get the radius. Plug the radius into the formula and calculate the volume using the value of π. This will give you the volume of the steel marble in cubic units.

Relative humidity is the ratio of the amount of water air is holding to the amount of water it can hold. The warmer air is, the more water it can hold. Therefore, as air temperature drops, relative humidity increases, even when no additional moisture is being added to the air. If the temperature continues to drop after the relative humidity reaches 100%, the excess moisture gets condensed out of the air. That is why dew forms during the night. The cold cup of water cools the air around it by conduction, so that cooler layer of air in contact with the cup loses its ability to hold its moisture, and the excess moisture condenses onto the cup.

To design a controlled experiment to test your friend's claim, you could set up two identical tanks with goldfish. In one tank, play music as the stimulus, while keeping the other tank silent as the control. Measure and record the swimming speeds of the goldfish in both tanks over a specific time period. Repeat the experiment multiple times to ensure reliability and consider variables such as the type of music, volume, and duration of exposure. Analyze the data statistically to determine if there is a significant difference in swimming speeds between the music-stimulated goldfish and the control group.

See what or who can jump higher,an animal or a human. Your hypothesis: "I think a human will jump higher,"or,"I think the animal will jump higher,".You could also test it out if you have a trampoline and an animal that will possibly let you set it on a trampoline ;^).

I don't believe air pressure has any effect on a ball bouncing. Gravity on the other hand greatly effects how a ball bounces. the less gravity the more it bounces.

On the other hand if you are referring to the air pressure inside of a ball that is a different story.

The effect is the inverse, the lower the pressure the less the ball will bounce, where higher pressure will increase proportionatly a higher bounce to the ball.