Science on the Main Stage Lesson 1 Flashcard

Front

What is density?

Back

Density is a measure of how much mass is contained in a given volume. It is usually expressed in grams per milliliter (g/mL) or kilograms per cubic meter (kg/m³).

Front

What is the formula to calculate density?

Back

Density = Mass / Volume

Front

Which substance is likely to have the highest density: Air, Iron, Wood, or Water?

Back

Iron has the highest density among these substances.

Front

How do you calculate the density of a substance if you know its mass and volume?

Back

To calculate density, divide the mass of the substance by its volume.

Front

What is the density of a sample of mineral oil if 250 mL has a mass of 230 g?

Back

The density is 0.92 g/mL.

Front

What is a pH indicator?

Back

A pH indicator is a substance that changes color in response to changes in pH, helping to determine the acidity or alkalinity of a solution.

Front

What is the primary use of cabbage juice in a laboratory setting?

Back

Cabbage juice is primarily used as a pH indicator.

Front

What substance reacts with glycerol according to the table?

Back

Potassium permanganate reacts with glycerol.

Front

What is the density of water?

Back

The density of water is approximately 1.00 g/mL at 4°C.

Front

What happens to the density of most substances when they are heated?

Back

Most substances expand when heated, which decreases their density.