conservation of matter

Front

What is the law of conservation of matter?

Back

The law of conservation of matter states that matter cannot be created or destroyed in a closed system; it can only change forms.

Front

If 15 grams of sugar are dissolved in 300 grams of water, what is the total mass of the mixture?

Back

315 grams.

Front

What happens to the mass of a mixture when substances are combined?

Back

The total mass of the mixture is equal to the sum of the masses of the individual substances.

Front

How is the mass of a solid compared to its shape?

Back

The mass of a solid does not change based on its shape; it remains constant.

Front

What is the mass of iron if 250 grams of iron and sand are separated and the mass of sand is 150 grams?

Back

100 grams.

Front

How are particles in a liquid arranged?

Back

Particles in a liquid are loosely packed together.

Front

How are particles in a solid arranged?

Back

Particles in a solid are tightly packed together.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change where the state of matter changes but the mass remains the same.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change where new substances are formed and mass is conserved.

Front

What happens to the mass of clay when it is shaped into different forms?

Back

The mass of the clay remains the same regardless of its shape.