A substance is pulverized (smashed) into a powder and then mixed with a liquid which begins to bubble. (Hint - Explain the change(s) that occurred.)
What is physical change and chemical change?
500
Digestive enzymes in saliva and the stomach cause food to break down into simpler compounds like sugars, fats, protein and carbohydrates. This type of digestion is...
What is chemical digestion?
500
C-H-O-N-P-S
What is carbon, hydrogen, oxygen, nitrogen, phosphorus and sulpher?
500
The cell wall protects and provides the shape of the cell, this is similar to...