When doing scientific experiments, how many independent variables should the experiment have?

The independent variable can be described as

The experiments dependent variable is also described as

All good fair experiments should have

After an experiment has been completed, which should be done next?

Students want to test weed control cloth on their garden and section their garden into 4 parts; each gets a different weed cloth. 10 peppers were planted in each section, and all other growing conditions remained the same. What is the ind. variable

Students want to test weed control cloth on their garden and section their garden into 4 parts; each gets a different weed cloth. 10 peppers were planted in each section, and all other growing conditions remained the same. What is the dep. variable

A light bulb manufacturer plans to introduce a new type of energy efficient bulb. Which comparison is most helpful in determining if the new bulb meets the goal of decreased energy usage?

What type of graph is best to use if showing a comparison of data?

A student hypothesized that a mouse would learn to run through a maze faster if food was at the end of the maze. Which tool will best help the student determine if the speed of the mouse improved?

WHich tool would be best to measure the MASS of an object?

Which of these is the best example of a product that results from adaptive engineering?

Students timed how long it took a beetle to travel across surfaces covered with different materials. All the surfaces were the same length. They calculated the average speed of the beetle and recorded the results. What is the independent variable?

An engineer builds a new machine that cuts glass. The machine holds a sharpened mineral that is used to cut the glass. Which test will best determine if the new machine works?

Students need to measure the rate at which water flows through different soil types. The students have a graduated cylinder. Which other tool will best help students perform this investigation?

Students wanted to measure the volume of a small screw. What tool would be best?

A student wanted to measure the volume of a box. What tool would be best?

A student wanted to heat 200 ml of water. What tool would be best?

A student wanted to measure the temperature of boiling water. What tool?

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