11. At student carries out an experiment to find how fast 3cm magnesium ribbon dissolve in 10 cm3 samples of sulfuric acid at different temperatures.
Which piece of apparatus does the student NOT need?
balance
O graduated cylinder
O stop-watch
O thermometer

answer; natural resources;

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

hope i !

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.