Explain the energy, temperature, and mass changes that occur when
a- an ice at 0°c, starts to melt (3 marks)
b- a saucepan filled with soup at 15°c is heated on a gas hob (3 marks)
c- boiling water from a kettle at 100°c turns to water vapour

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer