Carbon

Carbon means in Polish:

• magnez

• węgiel

• siarka

• wodór

Carbon occurs in the free state as graphite or diamonds.

• True

• False

The atmosphere contains 0.09% of carbon dioxide.

• True

• False

Carbon becomes more active in lower temperatures.

• True

• False

Marl is a naturally occuring mixture of calcium carbonate with:

• water

• clay or sand

• dust or rocks

Pure diamonds aren't colourless and transparent.

• True

• False

At higher temperatures carbon becomes more active.

• True

• False

Transparent diamonds are valuable jewels.

• True

• False

Carbon occurs naturally chiefly in the form of carbonates of various metals.

• True

• False

Graphite is lighterr than diamond.

• True

• False