Question

1. match the descriptions with the elements. iron silicon calcium oxygen aluminum helium the most abundant element on the earth is very reactive and is vital for air and water. rare on the earth, this inert gas is found in large amounts on the sun. the most abundant element found in the earths rocks is an important ingredient in concrete. this light, silver metal resists rusting and is used to make airplanes and containers for liquids. this metal is important in the production of steel and also in helping blood vessels transfer oxygen to body tissues. this silvery metal has a chalky texture in compounds and is an important element in bones of humans and animals.

Explanation:

1. Oxygen is the most abundant element on the earth and is vital for air and water.
2. Silicon is the most abundant element found in the earth's rocks and is an important ingredient in concrete.
3. Helium is a rare inert gas on the earth and is found in large amounts on the sun.
4. Aluminum is a light, silver - metal that resists rusting and is used to make airplanes and containers for liquids.
5. Iron is a metal important in the production of steel and also helps blood vessels transfer oxygen to body tissues.
6. Calcium is a silvery metal with a chalky texture in compounds and is important in bones of humans and animals.

Answer:

• The most abundant element on the earth is very reactive and is vital for air and water: Oxygen.
• The most abundant element found in the earth's rocks is an important ingredient in concrete: Silicon.
• Rare on the earth, this inert gas is found in large amounts on the sun: Helium.
• This light, silver metal resists rusting and is used to make airplanes and containers for liquids: Aluminum.
• This metal is important in the production of steel and also in helping blood vessels transfer oxygen to body tissues: Iron.
• This silvery metal has a chalky texture in compounds and is an important element in bones of humans and animals: Calcium.