1. The four properties of acids are that they are sour tasting, conduct electricity, they react to a base to neutralize its properties, and acts reacts with active metals to liberate hydrogen gas.
2. The four properties of bases are that they are bitter tasting, conduct electricity, they react to acids to neutralized its properties, and feels slippery to the skin
3. You can use the litmus paper by pouring the acid or base onto it, and you can see wether it is an acid or a base by what color the paper turns. If it turns red, it is an acid, and if the paper turns blue, it is a base.
4. You can tell if a food contains acid because it will taste sour (like I said in number one.) An example of a drink that contains acid is orange juice, and it can be very sour.
5. It is important to wear gloves when you are spreading fertilizer in the garden because there are chemicals that will burn or irritate your hands. Maybe there are acids in the fertilizer that could burn you.
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