True or False Quiz

The speed of sound varies with the type of medium and the state of the medium.

• True

• False

Below 100°C, the method of heat transfer is mainly conduction and convection.

• True

• False

Sodium hydroxide will turn blue litmus paper red.

• True

• False

Acid etching involves interaction between acid and metal.

• True

• False

Sulfur dioxide dissolves in rainwater to form acid that can corrode buildings.

• True

• False

Combustion occurs without oxygen.

• True

• False

A thick glass bottle cracks when hot water is poured into it because the water expands faster than glass.

• True

• False

The audible range of frequencies for an average human ear is 20 Hz to 2000 Hz.

• True

• False

Ultrasounds are sounds with frequencies too low for humans to hear.

• True

• False

The total amount of energy increases continuously along the food chain.

• True

• False