Exploring Matter and Its Changes

What is the smallest unit of matter that retains the properties of an element?

• Molecule

• Atom

• Compound

• Mixture

Which state of matter has a definite volume but no definite shape?

• Solid

• Liquid

• Gas

• Plasma

What type of change occurs when water freezes into ice?

• Chemical Change

• Physical Change

• Nuclear Change

• Biological Change

Which of the following is an example of a chemical change?

• Melting of ice

• Dissolving sugar in water

• Rusting of iron

• Breaking a glass

What is a mixture where the components are not uniformly distributed called?

• Homogeneous mixture

• Heterogeneous mixture

• Solution

• Compound

Which of the following is a solution?

• Sand and water

• Oil and water

• Salt dissolved in water

• Iron filings and sulfur

What is the formula for density?

• Density = Mass + Volume

• Density = Mass - Volume

• Density = Mass \times Volume

• Density = \frac{Mass}{Volume}

If an object has a density less than that of water, what will happen when it is placed in water?

• It will sink

• It will float

• It will dissolve

• It will remain suspended

Which of the following is NOT a property of matter?

• Mass

• Volume

• Color

• Temperature

What happens to the particles of a substance as it changes from a solid to a liquid?

• They move closer together

• They move farther apart

• They stop moving

• They become charged