Q1 (H.Chem) Midterm Review (Due day of Final)

Front

What is a physical change?

Back

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

Front

What is a chemical change?

Back

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

Front

How do you calculate density?

Back

Density is calculated using the formula: Density = Mass / Volume.

Front

What is the density of an object with a mass of 4g and a volume of 2cm³?

Back

2 g/cm³.

Front

What does it mean to read an instrument to the nearest tenth?

Back

It means to estimate the measurement to one decimal place.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a physical combination of substances that looks the same all the way through.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a physical combination of substances in which you can see the different parts.

Front

What is the particle model of matter?

Back

The particle model of matter states that all matter is made up of tiny particles that are in constant motion.

Front

What happens to particles in a solid?

Back

In a solid, particles are closely packed and can only vibrate in place.

Front

What happens to particles in a liquid?

Back

In a liquid, particles are close together but can move around each other.