Matter and Energy - Semester Test

Front

What is scientific notation?

Back

A method of expressing numbers as a product of a coefficient and a power of 10, making it easier to handle very large or very small numbers.

Front

How do you convert a number to scientific notation?

Back

Move the decimal point in the number until only one non-zero digit remains to its left, then multiply by 10 raised to the number of places the decimal was moved.

Front

What is a dependent variable?

Back

The variable that is measured in an experiment; it responds to changes in the independent variable.

Front

What is an independent variable?

Back

The variable that is changed or controlled in an experiment to test its effects on the dependent variable.

Front

What is a control variable?

Back

Factors that are kept constant throughout an experiment to ensure that the results are due to the independent variable.

Front

What is acceleration?

Back

The rate of change of velocity of an object, calculated as the change in velocity divided by the time taken.

Front

How do you calculate acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time.

Front

What is accuracy in measurement?

Back

The closeness of a measured value to the actual (true) value.

Front

What is precision in measurement?

Back

The degree to which repeated measurements under unchanged conditions show the same results.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.