WorksheetsChemical change, temperature, law of conservation of mass
Total questions: 6
Worksheet time: 3mins
Which of the following is an example of a chemical change
boiling water
tearing paper
digesting food
squishing a banana
Which of the following is a physical change?
freezing a popsicle
cooking an egg
a rotting apple
baking soda mixing with vinegar
Hot water will make sugar dissolve faster than cold water because
you stir hot water faster than cold
there is more sugar in hot water
the molecules are moving faster in hot water
the molecules are moving slower in hot water
Vinegar is being mixed with baking soda and it is producing a gas. What will make this reaction happen the SLOWEST?
use more baking soda
stir them together quickly
heat the vinegar first
Use vinegar from the refrigerator
Which of the following is NOT true?
burning does not destroy the matter in wood, it changes it to a new kind of matter
burning destroys the matter in wood but creates new ashes and smoke
burning changes wood into ashes and smoke
you cannot reverse the burning of wood
According to the law of conservation of mass:
2H + 2H = 4H
2O + 2H = OH
3C + 3O = 9CO
2C + 2O = 4CO2
