Science Questions

Which of the following best describes the differences between solids, liquids, and gases?

• Solids have a fixed shape and volume, liquids have a fixed volume but take the shape of their container, and gases have neither a fixed shape nor volume.

• Solids and liquids have a fixed shape, but gases do not.

• Liquids and gases have a fixed volume, but solids do not.

• Gases have a fixed shape and volume, while solids and liquids do not.

Which of the following is an example of an extensive property?

• Density

• Temperature

• Volume

• Color

Which of the following is a key difference between a physical change and a chemical change?

• A physical change alters the chemical composition of a substance, while a chemical change does not.

• A chemical change alters the chemical composition of a substance, while a physical change does not.

• Both physical and chemical changes alter the chemical composition of a substance.

• Neither physical nor chemical changes alter the chemical composition of a substance.

What is the difference between a mixture and a pure substance?

• A mixture contains two or more substances physically combined, while a pure substance has a uniform composition.

• A mixture has a uniform composition, while a pure substance contains two or more substances physically combined.

• A mixture is always a compound, while a pure substance is always an element.

• A mixture and a pure substance are the same.

What apparatus and procedure would you use to separate a mixture of sand, salt, water, and iron shavings?

• Filtration, evaporation, and magnetic separation

• Distillation and chromatography

• Centrifugation and decantation

• Sublimation and crystallization

Which scientist's experiment involved the use of special equipment and led to key conclusions?

• Scientist A

• Scientist B

• Scientist C

• Scientist D

Use the table to determine which two atoms are isotopes of the same element.

• Atom A and Atom B

• Atom B and Atom C

• Atom A and Atom C

• Atom C and Atom D

What is the density of a rectangular piece of metal with a mass of 48.5 g and dimensions 2.0 cm by 3.0 cm by 7.0 cm?

• 1.15 g/cm³

• 1.20 g/cm³

• 1.25 g/cm³

• 1.30 g/cm³

What is the volume of a substance with a density of 1.79 g/mL and a mass of 34.5 g?

• 19.28 mL

• 20.67 mL

• 18.50 mL

• 17.00 mL

What is the mass of a coin with a volume of 0.75 cm³ and a density of 2.73 g/cm³?

• 1.50 g

• 2.05 g

• 2.73 g

• 3.00 g