PSSA Review 8th grade Science

Front

What is the state of matter for Element A and Element B if both are solids?

Back

Both Element A and Element B are solids.

Front

What is the chemical formula for sugar?

Back

C6H12O6

Front

What is necessary for the chemical reaction involving sugar to occur, other than sugar itself?

Back

O2 (oxygen) is necessary for the reaction.

Front

What type of system is a food web?

Back

An open system.

Front

What is an example of a system in nature?

Back

A bunch of bees working together to make a hive.

Front

Which substances would sink in water?

Back

Substances B and D would sink in water.

Front

What is the definition of an open system?

Back

An open system is one that can exchange both matter and energy with its surroundings.

Front

What is the definition of a closed system?

Back

A closed system can exchange energy but not matter with its surroundings.

Front

What is the role of oxygen in cellular respiration?

Back

Oxygen is required to help convert glucose into energy.

Front

What is a food web?

Back

A food web is a complex network of feeding relationships among organisms in an ecosystem.