How Science Works Terms

1. What is an independant variable?

The variable that the scientist changes

The variable which the scientist calculates

The variable which the scientist measures

The correct answer is "The variable that the scientist changes." An independent variable is the variable that is deliberately manipulated or changed by the scientist in an experiment to observe its effect on the dependent variable. By altering the independent variable, the scientist can determine if there is a cause-and-effect relationship between it and the dependent variable.

Explanation

The correct answer is "The variable that the scientist changes." An independent variable is the variable that is deliberately manipulated or changed by the scientist in an experiment to observe its effect on the dependent variable. By altering the independent variable, the scientist can determine if there is a cause-and-effect relationship between it and the dependent variable.

2. A fair test should have only .......... variables.

A fair test should have only two variables. This means that there should be two factors or elements that are being tested or observed in the experiment. Having more than two variables can make it difficult to determine the cause and effect relationship between them, and may introduce confounding factors that can affect the validity of the results. Therefore, it is important to keep the number of variables limited to two in order to ensure a fair and reliable test.

Explanation

A fair test should have only two variables. This means that there should be two factors or elements that are being tested or observed in the experiment. Having more than two variables can make it difficult to determine the cause and effect relationship between them, and may introduce confounding factors that can affect the validity of the results. Therefore, it is important to keep the number of variables limited to two in order to ensure a fair and reliable test.

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3. What is a random error?

It is when one thing causes another thing to happen

When the equipment has an error making all the results wrong

Something caused by lack of care.

A random error refers to a mistake or variation in measurement or data that occurs due to factors beyond control or intention. It is not caused by a specific systematic error in the equipment or process, but rather by careless mistakes or lack of attention to detail. This can include errors in recording or reading data, improper calibration, or inconsistent experimental conditions. Random errors are typically unpredictable and can affect the accuracy and precision of measurements.

Explanation

A random error refers to a mistake or variation in measurement or data that occurs due to factors beyond control or intention. It is not caused by a specific systematic error in the equipment or process, but rather by careless mistakes or lack of attention to detail. This can include errors in recording or reading data, improper calibration, or inconsistent experimental conditions. Random errors are typically unpredictable and can affect the accuracy and precision of measurements.

4. Accurate means:

That the experiment would always give the same result

An exact mesurement which is close to the actual mesurement.

A good level of detail in an answer.

The correct answer is "A good level of detail in an answer." This means that when something is accurate, it provides sufficient information and includes all the necessary details. Accuracy in an answer implies that it is thorough, comprehensive, and leaves no room for ambiguity or confusion. It signifies a high level of precision and correctness in conveying information or explaining a concept.

Explanation

The correct answer is "A good level of detail in an answer." This means that when something is accurate, it provides sufficient information and includes all the necessary details. Accuracy in an answer implies that it is thorough, comprehensive, and leaves no room for ambiguity or confusion. It signifies a high level of precision and correctness in conveying information or explaining a concept.