Winter Break Review (PreCSA Review)

Front

What is photosynthesis?

Back

Photosynthesis is a chemical reaction where plants convert sunlight, carbon dioxide, and water into glucose and oxygen.

Front

What is a chemical reaction?

Back

A chemical reaction is a change in matter where molecules rearrange to form new substances.

Front

What is the formula for photosynthesis?

Back

The formula for photosynthesis is 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂.

Front

How many atoms of Carbon are in C₅H₄O₄?

Back

There are 5 atoms of Carbon in C₅H₄O₄.

Front

How many atoms of Hydrogen are in 5Cl₂H₅?

Back

There are 25 atoms of Hydrogen in 5Cl₂H₅.

Front

What is a physical change?

Back

A physical change is a change in the form or appearance of a substance without altering its chemical composition.

Front

What is an example of a chemical reaction?

Back

An example of a chemical reaction is the rusting of iron.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change affects the form of a substance, while a chemical change results in the formation of new substances.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What happens to atoms during a chemical reaction?

Back

During a chemical reaction, atoms are rearranged to form new molecules.