Waves and Radiations Revision

What type of waves are these?

• Electromagnetic

• Transverse

• Longitudinal

• Sound

Tags

NGSS.HS-PS4-1

Which of the following is the correct definition of frequency?

• The number of waves in one minute.

• The number of waves in one second.

• The time between 2 waves arriving.

• The number of waves in a certain amount of time.

Tags

NGSS.HS-PS4-1

Which one of the following statements about sound waves is true?

• Louder sounds have a larger amplitude.

• Louder sounds have a higher frequency.

• Quieter sounds have a higher frequency.

• Increasing the volume changes the pitch.

Which of the following is a use of X-rays in medicine?

• Imaging unborn babies.

• Finding cracks in weld.

• Monitoring kidney function.

• Detecting broken bones.

Tags

NGSS.HS-PS4-5

Which of the following is NOT a hazard of exposure to Ultraviolet (UV) radiation?

• Radiation burns.

• Cataracts in your eyes.

• Increased risk of skin cancer.

• Radiation poisoning.

Which of the following is a NATURAL source of nuclear radiation?

• Radon gas

• Weapons testing

• Medical procedures

• Chernobyl

Which of the following is an ARTIFICIAL source of nuclear radiation?

• Rocks

• Fall-out from nuclear accidents

• Cosmic rays

• People

Calculate the wavelength of an ultrasound wave if its frequency is 24,000 Hz and its speed is 340 m/s.

• 0.014 s

• 70.6 m

• 0.014 m

• 70.6 Hz

Tags

NGSS.HS-PS4-1

In an experiment to find the speed of sound in air, a pupil uses a fast timer and finds that sound takes 0.0146 seconds to travel 5.0 metres. What value will they get for the speed of sound in air?

• 342 m/s

• 340 m/s

• 3425 m/s

• 3425 m

Which of the following is NOT a way to reduce harm from over-exposure to the Sun?

• Use a tanning bed instead of sun-bathing

• Wear sun glasses

• Use sun block

• Stay out of the Sun in the middle of the day