Biotechnology and Environmental Science Questions

Which of the following is a chemical property of a substance?

• Color

• Boiling point

• Malleability

• Melting point

If two objects have the same mass but different volumes, which of the following must also be different?

• Density

• Weight

• Temperature

• Chemical composition

Which one of the following substances has the highest density at standard temperature and pressure (STP)?

• Oxygen gas (O2)

• Liquid water (H2O)

• Iron (Fe)

• Helium gas (He)

A substance has a mass of 250 g and a volume of 25 cm³. What is its density?

• 5 g/cm³

• 10 g/cm³

• 15 g/cm³

• 2 g/cm³

Which of the following best describes a physical change?

• Rust forming on iron

• Burning of paper

• Ice melting into water

• Vinegar reacting with baking soda

Which state of matter has a fixed shape and a fixed volume?

• Solid

• Liquid

• Gas

• Plasma

Which of the following phase changes is endothermic?

• Freezing

• Condensation

• Deposition

• Evaporation

Tags

NGSS.MS-PS1-4

Compared to gases and liquids, solids have:

• A) The most kinetic energy

• B) The least molecular attraction

• C) A fixed shape and volume

A supercritical fluid is a state of matter that:

• Exists only at extremely cold temperatures

• Behaves as both a liquid and gas

• Has a definite shape but no definite volume

• Can only be found in the Earth's mantle

Tags

NGSS.MS-PS1-4

If the volume of a gas is halved while the temperature remains constant, what happens to the pressure?

• It is halved

• It doubles

• It remains the same

• It decreases exponentially