Endothermic Exothermic

What is a physical change?

• A change that affects one or more physical properties but does not change the substance's chemical composition.

• A change that alters the chemical structure of a substance.

• A process that results in the formation of a new substance with different properties.

• A change that only affects the temperature of a substance.

What happens to temperature during an exothermic reaction?

• The temperature decreases.

• The temperature remains constant.

• The temperature increases.

• The temperature fluctuates.

Give an example of an endothermic process.

• Photosynthesis in plants.

• Combustion of fuels.

• Respiration in animals.

• Freezing of water.

In an endothermic reaction, energy is _________.

• released as heat energy.

• absorbed and changed into chemical energy.

• converted into kinetic energy.

• emitted as light energy.

What happens to temperature during an endothermic reaction?

• The temperature increases.

• The temperature remains constant.

• The temperature decreases.

• The temperature fluctuates.

_____ reactions usually feel hot!

• endothermic

• exothermic

• isothermal

• adiabatic

What type of change occurs when a piece of paper is burned?

• Physical Change

• Chemical Change

• Phase Change

• Biological Change

What type of change is iron rusting?

• Physical Change

• Chemical Change

• Biological Change

• Mechanical Change

What is a chemical change?

• A change that results in the formation of new chemical substances.

• A change that only affects the physical properties of a substance.

• A change that can be easily reversed without any new substances formed.

• A change that occurs only at high temperatures.

Is burning wood an endothermic or exothermic process?

• Endothermic

• Exothermic

• Neutral

• Isothermal