5th Grade Matter Review

Front

What is evaporation?

Back

Evaporation is the process by which liquid water turns into water vapor, usually due to heat from the sun. It is a key part of the water cycle.

Front

What factors affect the rate of evaporation?

Back

Temperature, wind speed, and humidity are the main factors that affect evaporation. Higher temperatures and wind speeds increase evaporation, while higher humidity decreases it.

Front

What is a saline solution?

Back

A saline solution is a mixture of salt (sodium chloride) and water, often used in medical and aquarium settings to maintain proper salinity.

Front

How do you calculate the concentration of a solution?

Back

Concentration is calculated by dividing the mass of the solute (salt) by the total mass of the solution (solute + solvent) and multiplying by 100 to get a percentage.

Front

What is a chemical change?

Back

A chemical change occurs when substances combine or break apart to form new substances, indicated by changes such as color, temperature, or the formation of gas.

Front

What is a physical change?

Back

A physical change is a change in the state or appearance of a substance without altering its chemical composition, such as melting ice or boiling water.

Front

What is the principle of mass conservation?

Back

The principle of mass conservation states that mass cannot be created or destroyed in a closed system; the total mass remains constant before and after a change.

Front

What happens to the mass of ice when it melts?

Back

The mass of the ice remains the same when it melts into water, as no mass is lost in the process.

Front

What is thermal expansion?

Back

Thermal expansion is the tendency of matter to change in volume in response to a change in temperature, causing materials to expand when heated.

Front

What is the difference between a physical and chemical change?

Back

A physical change alters the form or appearance of a substance without changing its identity, while a chemical change results in the formation of new substances.