8 NC Check-In Review Physical Science

Front

Is bending copper wire a physical or chemical change?

Back

Physical change: A change that does not alter the chemical composition of a substance.

Front

How many atoms of carbon (C) are in C6H12O6?

Back

6 atoms of carbon (C): The molecular formula indicates there are 6 carbon atoms.

Front

Which pair of elements has the most similar properties?

Back

N and P: Nitrogen and phosphorus are in the same group of the periodic table, sharing similar properties.

Front

What is a possible disadvantage of using flowing water to produce electricity?

Back

Ecosystem damage and loss of land: Hydroelectric power can disrupt local ecosystems and displace communities.

Front

If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products?

Back

6 atoms of carbon (C): The law of conservation of mass states that matter cannot be created or destroyed.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without changing its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is photosynthesis?

Back

A process used by plants to convert light energy into chemical energy, producing glucose and oxygen from carbon dioxide and water.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction; it remains constant.

Front

What are the main components of an atom?

Back

Protons, neutrons, and electrons: Protons and neutrons are in the nucleus, while electrons orbit around it.