helium

«helium» in Mova's school dictionary: A very light gas with no colour or smell that is lighter… — its meaning for a pupil, its sense in the lessons and examples, with 5 sentences of Mova's corpora that use it.

part of speech

noun (helium — uncountable)

meaning for a pupil

1) A very light gas with no colour or smell that is lighter than air; it is used to fill party balloons and airships so they float. tree →

2) A chemical element (symbol He), the second lightest of all. tree →

sense in the lessons

In science, helium is lighter than air, so helium balloons rise; the Sun makes helium from hydrogen. It does not burn, so it is safer than hydrogen in airships. Safety: never breathe in helium from balloons or tanks — it can stop you getting oxygen and make you pass out. Phrases: «helium balloon», «filled with helium».

examples

• The party balloons were filled with helium. tree →
• Helium balloons float up into the sky. tree →
• Helium is lighter than air. tree →
• The Sun turns hydrogen into helium. tree →
• Don't breathe in helium; it can be dangerous. tree →
• A helium balloon goes floppy after a few days. tree →
• Let balloons go only if they won't harm birds and sea animals. tree →

note

Uncountable: «some helium». A gas, not a liquid. The funny squeaky voice trick is not safe. Released balloons come down as litter that can hurt wildlife.

In the corpora

• Breathing helium from a gas tank is dangerous: it can harm the lungs and leaves the body without oxygen.
• Helium atoms are so tiny they slip through the rubber skin of a party balloon, so it shrinks in a few days.
• Jupiter is a gas giant made mostly of hydrogen and helium, like the Sun, and has no solid surface to stand on.
• Like Jupiter, Saturn is made mostly of hydrogen and helium.
• A star is a huge ball of hot gas, mostly hydrogen and helium, that makes its own light.

Trees and pragmatics

Every meaning and example of «helium» parsed by Mova, each sentence with its dependency tree and frames.