Angelique investigates four sounds A, B, C and D using an oscilloscope. Look at her oscilloscope traces. a. Circle the loudest sound. A B C D (1 mark) b. Which of these will make the sound louder? Tick (✓) the correct answer. (1 mark) c. Circle the sound with the highest pitch. A B C D (1 mark) LS SCIENCE YEAR 9 ASSIGNMENT 09 © 2022, Wolsey Hall Oxford. All Rights Reserved. 2 d. Which of these increases the pitch of the sound? Tick (✓) the correct answer. (1 mark) e. Are these digital or analogue waves? ___________because____________________________________________________ _________________________________________________________________________ (1 mark)