Answer:
the vaccine causes the immune system to produce antibodies to the virus that causes the measles
Answer:
Use the vingear and baking soda experiment but change it to lemon and not vingear.
Explanation:
A chemical reaction takes place when vinegar and baking soda are mixed. One of the new substances formed is carbon dioxide gas. If the carbon dioxide gas is contained, the mass of the substances will stay the same according to the Law of Conservation of Mass. If the gas is allowed to escape, the mass will be less
Answer: A semi-permeable membrane is that which only allows certain
substances to pass through.
Answer. They are the “last trophic level” in some hierarchies because they feed on everything (National Geographic). However, according to the strict trophic level definition they would be primary consumers.
Ionic compound means a metal bonds with a nonmetal.
<span>KBr Potassium Bromide, metal and nonmetal. (Ionic) </span>
<span>SO2 Sulphur Di-oxide, nonmetals (covalent) </span>
<span>FeCl3, Metal and nonmetal (Ionic) </span>
