II. VARIABLES: The independent variable is the different amounts salt that will be added to the water (what is done by the scientist). The dependent variable is the boiling temperature
Is salt a dependent variable?
Independent variables include type of salt (i.e. rock salt, table salt) and amount of salt (i.e. no salt, 1/2 tsp., 1 tsp., 1 tbls.). Time (in seconds) for ice to melt was used as the dependent variable.
What is the independent variable in salt water freezing experiment?
The independent variable (also known as manipulated variable) is the amount of salt in water . The amount of salt in water may be reported as the percent of salt in water or as grams of salt per liter of water. The dependent variable (also known as responding variable) is the freezing point of water.
What is the dependent variable in her experiment?
The dependent variable is the variable that is being measured or tested in an experiment .1 For example, in a study looking at how tutoring impacts test scores, the dependent variable would be the participants' test scores, since that is what is being measured.
What is the dependent variable in the floating egg experiment?
The dependent variable was the egg floating in the water . The control group was the beaker with just water. The experimental group was the group with salt water.
Is water a dependent variable?
The dependent variable is usually what scientists measure in an experiment. ... In this case, the amount of water is the independent variable because that is what you're changing in the experiment: one seed gets a lot of water and the other seed only gets a little water.
What are the 3 types of variables?
A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled .
How many times should an experiment be repeated to make sure the results are valid?
Most teachers want you to repeat your experiment a minimum of three times . Repeating your experiment more than three times is even better, and doing so may even be required to measure very small changes in some experiments. In some experiments, you can run the trials all at once.
How does adding salt to water affect its freezing point experiment?
Hypothesis: The more salt added into the water, the density of the water will be increased because salt weighs more than water . Therefore, the water will have a lower freezing point. Independent: the difference in each cup is the amount of salt added to the water.
How does adding salt to water affect the time it takes to freeze?
When you add salt ions to water, it stabilizes the liquid water. ... Because the solution is more stable than the pure liquid, it is harder to turn it into a had or into a solid. For this reason, the boiling point increases and the melting point (freezing point) decreases .
What is an example of an independent variable?
It is a variable that stands alone and isn't changed by the other variables you are trying to measure. For example, someone's age might be an independent variable. Other factors (such as what they eat, how much they go to school, how much television they watch) aren't going to change a person's age.
What is the difference between dependent and independent variable?
The independent variable is the variable the experimenter manipulates or changes, and is assumed to have a direct effect on the dependent variable. ... The dependent variable is the variable being tested and measured in an experiment, and is ‘dependent' on the independent variable.
How do you find the dependent variable?
The dependent variable is the one that depends on the value of some other number . If, say, y = x+3, then the value y can have depends on what the value of x is. Another way to put it is the dependent variable is the output value and the independent variable is the input value.
What will happen to the egg in the glass of water if you add salt on it dependent variable?
Because the density of the egg is higher than the density of tap water, so it sinks. ... When enough salt is added to the water, the saltwater solution's density becomes higher than the egg's , so the egg will then float! The ability of something, like the egg, to float in water or some other liquid is known as buoyancy.
Do boiled eggs float or sink in water?
You can drop your hard-boiled egg in and it will sink to the bottom of the first layer, but float on top of the salt water ! The egg is denser than tap water, so it sinks. Adding salt water to the water makes the water denser than the egg. This causes the egg to float!
Are Floating eggs bad?
Simply fill a bowl with cold tap water and place your eggs in it. If they sink to the bottom and lay flat on one side, they are fresh and good to eat. A bad egg will float because of the large air cell that forms at its base . Any floating eggs should be thrown out.
