Chemical Changes and Properties of Matter

How do we define mass and volume?

• Mass is the amount of space an object takes up; volume is how heavy it is.

• Mass is how heavy something is; volume is how much space it takes up.

• Mass is the amount of matter in an object; volume is the weight of the object.

• Mass is how much space an object takes up; volume is the density of the object.

What is the difference between accuracy and precision?

• Accuracy is how often measurements are correct; precision is how close they are to each other.

• Accuracy is how close measurements are to the true value; precision is how often they are correct.

• Accuracy is how close measurements are to the true value; precision is how close they are to each other.

• Accuracy is how often measurements are correct; precision is how close they are to the true value.

What is the density of a piece of wood with a mass of 25.0 grams and a volume of 29.4 cm³?

• 0.75 g/cm³

• 0.85 g/cm³

• 1.00 g/cm³

• 1.15 g/cm³

Would a piece of wood with a density of 0.85 g/cm³ float in water?

• Yes, because its density is less than water's density.

• No, because its density is more than water's density.

• Yes, because it is heavier than water.

• No, because it is lighter than water.

What does the kinetic molecular theory of matter describe?

• How particles are stationary and do not move.

• How particles are made of energy and do not exist.

• How all matter is made of tiny particles that are always moving.

• How particles are large and move slowly.

How are temperature and heat related?

• Temperature measures how heavy particles are; heat is the energy of light.

• Temperature measures how fast particles are moving; heat is the energy that moves from warmer to cooler.

• Temperature measures the size of particles; heat is the energy of sound.

• Temperature measures the color of particles; heat is the energy of motion.

How would matter be different if atoms had no electrons?

• Atoms would be able to make chemical bonds easily.

• Atoms would not be able to make chemical bonds.

• Atoms would be heavier and more stable.

• Atoms would be lighter and more reactive.

Why is mass conserved in a chemical reaction, even when gases are produced?

• Atoms are created and destroyed during reactions.

• Atoms disappear and reappear in different forms.

• Atoms are not created or destroyed; they just move around.

• Atoms are lost to the environment during reactions.

How would you measure the volume of an object in space, where liquids float?

• Use a ruler to measure the object's length.

• Use a mathematical formula or a 3D scanner.

• Use a scale to weigh the object.

• Use a thermometer to measure the object's temperature.

Why do some objects with greater mass float while others with less mass sink?

• Because of the object's color.

• Because of the object's density.

• Because of the object's shape.

• Because of the object's temperature.