16. Conservation of Mass

Poll

Which of the following do you think best describes the conservation of mass?

• Mass can be created or destroyed during a chemical reaction.

• Mass remains constant during physical and chemical changes.

• Mass always increases in a chemical reaction.

• Mass is only conserved in physical changes.

Multiple Choice

Which tool would you use to measure the mass of an object?

• Thermometer

• Balance scale

• Ruler

• Graduated cylinder

Multiple Select

Which of the following examples demonstrate the conservation of mass?

• Melting ice cube into water

• Burning paper into ash

• Evaporating water into vapor

• Dissolving sugar in water

Multiple Choice

What does the conservation of mass tell us about the mass of a substance when it changes form?

• The mass will increase

• The mass will decrease

• The mass will not change

• The mass will double

Multiple Choice

If a book has a mass of 34 grams and with a bookmark it has a mass of 39 grams, what is the mass of the bookmark?

• 5 grams

• 34 grams

• 39 grams

• 73 grams

Multiple Choice

I am making cucumber water. When I am done making it, my drink weighs 174 grams. If I added 23 grams of cucumbers to the water, what was the mass of the water?

• 151 grams

• 197 grams

• 23 grams

• 174 grams

Multiple Choice

If you combine 80 grams of oil and 80 grams of vinegar to make a salad dressing, what will be the mass of the salad dressing?

• 160 grams

• 80 grams

• 100 grams

• 120 grams

Multiple Choice

Which of the following examples best illustrates the conservation of mass in everyday life?

• Mixing ice cream and cone to make an ice cream cone

• Melting ice into water

• Evaporating water

• Burning paper

Multiple Choice

What is the mass of the unknown paper piece if the whole paper is 50 grams and one piece is 20 grams?

• 30 grams

• 20 grams

• 50 grams

• 10 grams

Multiple Choice

Which statement best describes the conservation of mass?

• Mass is lost during chemical changes.

• Mass is created during physical changes.

• Mass remains the same regardless of the changes to matter.

• Mass increases when matter changes state.

Open Ended

How does the law of conservation of mass apply to physical and chemical changes in matter?