Unit 1 - Part 2: Lesson 3 - Energy Changes in Chemical Reactions

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases thermal energy to the surroundings, resulting in an increase in temperature.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs thermal energy from the surroundings, resulting in a decrease in temperature.

Front

What happens to energy in an exothermic reaction?

Back

In an exothermic reaction, the reactants have higher energy than the products, and energy is released.

Front

What happens to energy in an endothermic reaction?

Back

In an endothermic reaction, energy is absorbed from the surroundings.

Front

What is a cold pack and how does it work?

Back

A cold pack is a device that absorbs heat from its surroundings through an endothermic reaction, providing a cooling effect.

Front

What occurs during cellular respiration?

Back

During cellular respiration, the bonds in glucose break, releasing energy for cellular activities.

Front

What is the primary energy source for photosynthesis?

Back

The primary energy source for photosynthesis is sunlight.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter, which is the total kinetic energy of particles.

Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that involves the rearrangement of the molecular or ionic structure of a substance.