Chemistry Chapter 3 Test Review

Front

What is the SI unit of mass?

Back

gram

Front

The weight of an object _____?

Back

depends on its location.

Front

What does precision mean in measurements?

Back

Precision refers to the consistency of repeated measurements, regardless of their accuracy.

Front

What does accuracy mean in measurements?

Back

Accuracy refers to how close a measurement is to the true value.

Front

What is scientific notation?

Back

A way to express very large or very small numbers using powers of ten.

Front

Convert 0.000 000 000 154 m to scientific notation.

Back

1.54 x 10^-10 m.

Front

What is the temperature of absolute zero in °C?

Back

-273°C.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is the formula for calculating weight?

Back

Weight = mass × gravitational acceleration (W = mg).

Front

What is the significance of the Kelvin scale in temperature measurement?

Back

The Kelvin scale starts at absolute zero and is used in scientific contexts.