Grade 6 - Unit 6 - Earth Physics Pop Quiz

Things _______ to make sound

• charge

• flow

• vibrate

• transform

Sound can vary in _____ and ____.

• vibrations and quality

• quality and quantity

• depth and melody

• amiplitude and pitch

The _______ of the sound wave is 343 metres per second

• speed

• length

• frequency

• loudness

The _________ of a sound wave is called as an echo

• expansion

• reflection

• transmission

• production

Which of the following will give the best echo in a room?

• Soft curtains

• Glass window

• Thick carpet

• Woolen blanket

The centre of the earth is called as ____________

• Inner core

• Magma

• Molten Rocks

• Crust

Earths crust is made up of large __________

• lava

• ice sheets

• tectonic plates

• magnetic field

This picture shows __________

• Lunar eclipse

• Tidal Waves

• Graviatational pull of Earth

• Solar eclipse