GRADE 7 DESCARTES & HOBBES PRACTICE TEST

what form of wave is sound?

• Transversal

• Mechanical

•     Electromagnetic

• Ultrasonic

Which materials do sound cannot travel through?

• Rock

• Vacuum

• Medium

• Water

Which of the following intensity would you hear as loud?

• 30 db

• 111 db

• 71-90 db

• 31-50 db

What is a measurement of the intensity of the sound?

• Tone

• Decibel Scale

• Frequency

• Pitch

Which color has the highest frequency?

• Violet

• Red

• Yellow

• Blue

What is light?

• Electromagnetic wave

• Mechanical Wave

• Sound Wave

• Light wave

Which object can emit light?

• Oblique

• Luminos

• Nonluminous

• Opaque

What do you call the cycle of hot and cold fluid?

• Conduction

• Convection

• Insulation

• Radiation

What happens in a heat transfer?

• High energy particle collides to low energy particle

• High energy particle collides to high energy particle

• Low energy particle collides to low energy particle

• Low energy particle collides to high energy particle

“Heat energy comes from the sun”. What does this statement refer to?

• Radiation

• Convection

• Insulation

• Conduction