Midpoint A1 Practice Test

Front

What is density?

Back

Density is the mass of a substance divided by its volume, typically expressed in grams per cubic centimeter (g/cm³). It determines how heavy a substance is for a given volume.

Front

How can you determine the order of density of liquids?

Back

By observing which liquids float on top of others. The liquid that floats is less dense than the liquid below it.

Front

What happens when a less dense liquid is mixed with a denser liquid?

Back

The less dense liquid will float on top of the denser liquid.

Front

What is a solution?

Back

A solution is a homogeneous mixture where one substance (solute) is dissolved in another (solvent), such as sugar in water.

Front

Which of the following substances would form a solution when added to water: sand, sugar, rocks, or iron filings?

Back

Sugar would form a solution when added to water.

Front

What is thermal conductivity?

Back

Thermal conductivity is the ability of a material to conduct heat. Materials with high thermal conductivity transfer heat quickly.

Front

Which materials are typically good thermal conductors?

Back

Metals like silver and stainless steel are good thermal conductors, while materials like plastic are poor conductors.

Front

What is the significance of using a magnet in identifying substances?

Back

Using a magnet can help identify substances that are magnetic, such as iron, which can narrow down the identity of an unknown substance.

Front

What is the relationship between mass, volume, and density?

Back

Density = Mass / Volume. This formula shows how mass and volume are related to determine the density of a substance.

Front

What is the effect of temperature on the density of liquids?

Back

Generally, as temperature increases, the density of liquids decreases because the liquid expands.