5th Science Test Prep2

Front

What is density?

Back

Density is the mass of an object divided by its volume. It determines how heavy an object is for its size.

Front

What is a chemical change?

Back

A chemical change occurs when substances combine or break apart to form new substances, which cannot be easily reversed.

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same.

Front

What is a solution?

Back

A solution is a mixture where one substance (the solute) is dissolved in another (the solvent), creating a homogeneous mixture.

Front

What is the process of filtration?

Back

Filtration is a method used to separate solids from liquids or gases using a filter that allows only the fluid to pass through.

Front

What is the role of oxygen in burning?

Back

Oxygen is a reactant in combustion, allowing substances like wood to burn and produce heat, light, carbon dioxide, and water.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each retains its own properties and can be separated by physical means.

Front

What is the purpose of using a magnet in separation?

Back

A magnet can attract magnetic materials, such as iron filings, allowing for easy separation from non-magnetic substances.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is concentration in a solution?

Back

Concentration refers to the amount of solute present in a given volume of solvent, indicating how strong or weak the solution is.