Unit 4 Chemistry Review with Photosynthesis

Front

What is a physical change?

Back

A physical change is a change in physical properties of matter where the matter changes but what it is made of does not.

Front

What are metalloids?

Back

Metalloids are elements found along the staircase on the periodic table that have properties of both metals and nonmetals.

Front

In the equation 2Mg + O2 ---> 2MgO, what are the reactants?

Back

The reactants are Mg (magnesium) and O2 (oxygen).

Front

What is a chemical change?

Back

A chemical change is a change in the chemical properties of matter that occurs when two or more kinds of matter combine to form a new substance with different properties.

Front

What is an example of a physical property?

Back

An example of a physical property is color.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

Front

What is the role of chlorophyll in photosynthesis?

Back

Chlorophyll is the green pigment in plants that absorbs light energy for photosynthesis.

Front

What are the products of photosynthesis?

Back

The products of photosynthesis are glucose (sugar) and oxygen.

Front

What is the chemical equation for photosynthesis?

Back

The chemical equation for photosynthesis is 6CO2 + 6H2O + light energy ---> C6H12O6 + 6O2.

Front

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

Back

A physical change affects the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.