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There are 347 clues with the answer 'OXYGEN'
# CLUE
1.
Essential gas for animals; the process of photosynthesis adds it to the atmosphere. (6)
2.
39-Across
3.
Most abundant element in the earth's crust
4.
Atmosphere part
5.
Gas in the
6.
Part of H2O
7.
Human need
8.
Orthodoxy generally includes a common element (6)
9.
Passenger in Airport?
10.
Respiratory element (6)
11.
Breathable gas (6)
12.
Most abundant element in Earth's crust
13.
Two hydrogens and one ______.
14.
Onyx eg produced gas (6)
15.
Gas that forms about 20 per cent of the atmosphere (6)
16.
Axes old information about gas (6)
17.
____ tent, an enclosure put around a hospital patient to aid breathing (6)
18.
In photosynthesis: carbon dioxide + water a†’ sugar + ?
19.
Two hydrogens and one ___.
20.
This element is the most plentiful element in Earth's crust, and it makes up about 21 percent of the atmosphere. Its gaseous form is a critical part of aerobic respiration.
21.
What element has the symbol O?
22.
Element essential to life, it was first discovered as existing in air by the scientist Joseph Priestley
23.
O, elementally speaking
24.
Photosynthesis element
25.
What was discovered by both Joseph Priestley and Carl Wilhelm Scheele in 1774? (6)
26.
Gas to breathe (6)
27.
TV channel named after a chemical element
28.
Gas needed for combustion (6)
29.
Essential gas
30.
Gas produced during photosynthesis (6)