Mid-Year Skills Check Review

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³). It determines whether an object will float or sink in a fluid.

Front

What is a hypothesis in scientific experiments?

Back

A hypothesis is a testable statement or prediction about the relationship between variables in an experiment.

Front

What are independent and dependent variables?

Back

Independent variables are the factors that are changed or controlled in an experiment, while dependent variables are the factors that are measured or observed.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas, each defined by the arrangement and behavior of their particles.

Front

What is a solid?

Back

A solid is a state of matter that has a definite shape and volume, with particles that are closely packed together.

Front

What is a liquid?

Back

A liquid is a state of matter that has a definite volume but takes the shape of its container, with particles that are close together but can move past one another.

Front

What is a gas?

Back

A gas is a state of matter that has no definite shape or volume, with particles that are far apart and move freely.

Front

What is an ion?

Back

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net electrical charge.

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.