LBSS 8th grade Final Exam 2025

Front

What property of matter is most responsible for the fact that sound travels at different speeds through different materials?

Back

Density

Front

When sound waves with large amplitude are compared with sound waves of small amplitude, which of the following is true?

Back

more energy and sound louder

Front

Sound is transmitted by ---

Back

compression waves

Front

Why can't astronauts on the Moon hear a landslide?

Back

Air molecules on the Moon are too far apart to carry sound.

Front

How do the particles in a sound wave move in relation to the path of the wave that carries them?

Back

They vibrate back and forth along the path the wave travels.

Front

Why did the aluminum foil spiral twirl when held over a warm toaster?

Back

formation of convection currents

Front

The energy transfer taking place at different points in a pan on a stove is shown below. Which choice correctly shows the process of energy transfer at points 1 and 2?

Back

1: convection, 2: conduction

Front

A metal spoon was placed in a dish of ice cream and became cool. Which correctly describes the heat transfer process that resulted in the cooling of the spoon?

Back

Conduction, because the spoon was in contact with the cold ice cream

Front

Absolute zero on the Kelvin temperature scale is defined as the point where -

Back

all matter should stop motion

Front

The molecules in a 5 kg block of ice -

Back

move constantly at a slow rate