24-25 1st Semester Final Review

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, such as rusting of iron.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H) and oxygen (O).

Front

What two measurements make up density?

Back

Density is defined as mass divided by volume. It is calculated using the formula: Density = Mass/Volume.

Front

What is a nonmetal?

Back

Nonmetals are elements that are typically dull, brittle, and poor conductors of heat and electricity. Examples include carbon and sulfur.

Front

How do you calculate density?

Back

Density is calculated by dividing the mass of an object by its volume. The formula is: Density = Mass (g) / Volume (cm³).

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in grams, while weight is the force exerted by gravity on that mass, measured in newtons.

Front

What is the state of matter for water at room temperature?

Back

At room temperature, water is in a liquid state.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H₂O, which consists of two hydrogen atoms and one oxygen atom.

Front

What is a metalloid?

Back

Metalloids are elements that have properties of both metals and nonmetals. Examples include silicon and germanium.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide (rust).