Semester 1 Final Physical Science -Leeson

Front

What is density?

Back

Density is the mass of an object divided by its volume, typically expressed in grams per cubic centimeter (g/cm³). It determines whether an object will float or sink in a fluid.

Front

Which materials will float in water?

Back

Materials with a density less than 1 g/cm³ will float in water. Examples include gasoline (0.7 g/cm³) and paraffin (0.87 g/cm³).

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

How do you calculate the volume of an irregular object?

Back

The volume of an irregular object can be calculated using water displacement. Submerge the object in water and measure the change in water level.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the significance of protons in an atom?

Back

Protons determine the element's identity and its position on the periodic table.

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and help stabilize the nucleus.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume.