Grade 6 Earth Physics

Things _______ to make sound

• charge

• vibrate

• flow

• transform

Which objects REFLECT more light?

• Shiny objects

• Dull objects

The _______ of the sound wave is 343 metres per second

• speed

• frequency

• loudness

• length

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?

• woolen blanket

• soft curtain

• thick carpet

• Glass window

The centre of the earth is called as ____________

• crust

• molten rock

• Inner core

• magma

What is the outermost layer of the earth called?

• mantle

• crust

• outer core

• inner core

What is the term for the bouncing back of a sound wave?

• expansion

• refraction

• transmission

• reflection

Earths crust is made up of large __________

• tectonic plate

• lava

• ice sheet

• magnetic field

Which of the following will produce the loudest echo in a room?

• woolen blanket

• soft curtain

• thick carpet

• Hardwood floor