Physical Science 4th Quarter Exam

What is a chemical reaction?

• A chemical reaction is a process that does not involve any change in properties of substances.

• A chemical reaction is a process that leads to the transformation of physical substances.

• A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

• A chemical reaction is a process that involves only one chemical substance.

List the four states of matter.

• energy

• plasma

• solid, liquid, gas, plasma

• liquid

• solid

Explain the concept of energy transfer.

• Energy transfer is the conversion of matter into energy.

• Energy transfer is the movement of energy from one system to another.

• Energy transfer is the transfer of mass between systems.

• Energy transfer is the process of storing energy in a system.

What is an exothermic reaction?

• An exothermic reaction absorbs energy from the surroundings

• An exothermic reaction has no change in energy

• An exothermic reaction releases energy in the form of heat or light.

• An exothermic reaction only occurs in living organisms

Describe the process of sublimation.

• Sublimation is the process of a substance transitioning from a gas phase to a solid phase.

• Sublimation is the process of a substance transitioning from a solid phase to a liquid phase.

• Sublimation is the process of a substance transitioning from a liquid phase to a gas phase.

• Sublimation is the process of a substance transitioning directly from a solid phase to a gas phase without passing through the liquid phase.

How does energy transfer occur in conduction?

• Energy transfer in conduction occurs through direct contact between particles.

• Energy transfer in conduction occurs through electromagnetic waves

• Energy transfer in conduction occurs through convection

• Energy transfer in conduction occurs through radiation

What is the Law of Conservation of Energy?

• Energy can be created out of nothing

• Energy cannot be created or destroyed, only transferred or transformed from one form to another.

• Energy can be destroyed completely

• Energy can only be transformed into matter

Define endothermic reaction.

• A reaction that occurs at a low temperature.

• A chemical reaction that absorbs heat from its surroundings.

• A process that does not involve any heat exchange.

• A chemical reaction that releases heat from its surroundings.

Explain the difference between evaporation and boiling.

• Evaporation happens below the boiling point of a liquid, while boiling occurs at the boiling point.

• Evaporation involves a change in state, while boiling does not.

• Evaporation occurs in solids, while boiling occurs in liquids.

• Evaporation is a rapid process, while boiling is slow.

How does energy transfer happen in radiation?

• Through the transmission of neutrons

• Through the absorption of electrons

• Through the emission of photons

• Through the reflection of protons