December Benchmark Review 2024

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products involved.

Front

What element is living matter mostly made of?

Back

Oxygen is the element that living matter is mostly made of.

Front

What type of weathering causes cracks in rocks?

Back

Physical weathering causes cracks in rocks.

Front

What is water known as due to its ability to dissolve many substances?

Back

Water is known as the universal solvent.

Front

What type of change is represented by a chemical reaction?

Back

A chemical change is represented by a chemical reaction.

Front

Define physical weathering.

Back

Physical weathering is the process of breaking down rocks and minerals through physical forces without changing their chemical composition.

Front

What is the role of oxygen in living organisms?

Back

Oxygen is essential for respiration in living organisms, allowing them to convert food into energy.

Front

Give an example of a chemical change.

Back

An example of a chemical change is rust forming on iron when it reacts with oxygen and moisture.

Front

What is the significance of the universal solvent in biological systems?

Back

The universal solvent, water, is crucial for transporting nutrients and waste in biological systems.

Front

What are reactants in a chemical equation?

Back

Reactants are the starting substances that undergo a chemical change in a reaction.