9th Grade Midterm - Review

Front

What happens to the temperature of a substance during a change of state?

Back

It fluctuates.

Front

Which element is represented by the symbol 'K'?

Back

Potassium.

Front

What determines the identity of an element?

Back

Number of protons.

Front

When heated, the viscosity of a liquid generally:

Back

Decreases.

Front

A material's ability to return to its original shape after being stretched is called ____________________________.

Back

elasticity.

Front

What is the definition of viscosity?

Back

Viscosity is a measure of a fluid's resistance to flow.

Front

What is buoyancy?

Back

Buoyancy is the ability of an object to float in a fluid.

Front

What is density?

Back

Density is the mass per unit volume of a substance.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus.

Front

What is the difference between an element and a compound?

Back

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