Reteach and Remediate: Matter/Energy

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy in the form of heat, causing the temperature of the surroundings to increase.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a type of mixture where the components are not uniformly distributed, and different parts can be easily distinguished.

Front

Describe the energy transformation in a circuit with a battery and a light bulb.

Back

The energy transformation in the circuit is: chemical energy (from the battery) → electrical energy (in the wires) → light energy (in the light bulb).

Front

What are pure substances?

Back

Pure substances are materials that have a constant composition and consistent properties throughout. They can be elements or compounds.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, ensure that the number of atoms of each element is the same on both sides of the equation by adjusting coefficients.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed when two or more elements chemically bond together, while a mixture is a combination of two or more substances that retain their individual properties.

Front

What is the formula for calculating density?

Back

Front

What happens to temperature in an endothermic reaction?

Back

In an endothermic reaction, the temperature of the surroundings decreases because the reaction absorbs heat from the environment.

Front

What is the significance of the coefficients in a balanced chemical equation?

Back

Coefficients indicate the number of molecules or moles of each reactant and product involved in the reaction.