Introduction to Physical Science

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What is matter?

Matter is anything that has mass and takes up space.

How are elements different from compounds?

Elements are pure substances with one type of atom, while compounds consist of two or more elements chemically combined.

What is the atomic number of an element?

The atomic number is the number of protons in an atom's nucleus.

What is the law of conservation of mass?

It states that mass is neither created nor destroyed in a chemical reaction.

What are the three main states of matter?

The three main states of matter are solid, liquid, and gas.

What is a chemical reaction?

A chemical reaction is a process where substances transform into new substances with different properties.

Why is water considered a universal solvent?

Water can dissolve more substances than any other liquid due to its polar nature.

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

A physical change alters form, not identity, while a chemical change alters the substance's chemical structure.

How does temperature affect the state of matter?

Temperature changes can cause matter to change states, such as melting or freezing.

What is a mixture?

A mixture contains two or more substances physically combined but not chemically bonded.

How is density calculated?

Density is calculated by dividing mass by volume (Density = mass/volume).

What is the boiling point of water at sea level?

The boiling point of water at sea level is 100°C (212°F).

What does pH measure?

pH measures the acidity or basicity of a solution.

What is an atom?

An atom is the smallest unit of an element that retains its chemical properties.

What is energy?

Energy is the capacity to do work or produce heat.