Ingredients of rocket fuel are:

• Hydrogen

• Carbon Dioxide

• Oxygen

• Nitrogen

Smoke from the dry ice is an effect of ....... of dry ice.

Liquid oxygen is:

• Pink

• Green

• Celadon

• Blue

Ingredients of substance in breathing apparatuses are oxygen and hydrogen.

• True

• False

Welder is a man who combines metals.

• True

• False

Oxygen refines:

Wich element has got the lowest density?

• Carbon Dioxide

• Hydrogen

• Oxygen

• They have got the same density

The name of prototype of bus powered by hydrogenous fuel is Solaris Urbino 12 hydrogen.

• True

• False

The effect of cryotherapy isn't:

• Faster action of the organism

• Bleach of teeth

• Quicker Metabolic Rate

• Faster recovery of damage tissues

The symbol of Hydrogen is:

• Hy

• He

• H

• Ho