Question

1. match the descriptions with the elements.

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 Earth and is crucial for air and water, being very reactive.
2. Helium is a rare inert - gas on Earth but abundant on the Sun.
3. Silicon is the most abundant element in Earth's rocks and is an important ingredient in concrete.
4. Aluminum is a light, silver metal that resists rusting and is used in airplane manufacturing and liquid containers.
5. Iron is important in steel production and helps blood vessels transfer oxygen to body tissues.
6. Calcium is a silvery - metal that has a chalky texture in compounds and is important for bones in humans and animals.

Answer:

1. Oxygen
2. Helium
3. Silicon
4. Aluminum
5. Iron
6. Calcium