Solve these clues to fill the grid.
- A black colloidal substance consisting wholly or principally of amorphous carbon and used to make
- 4 Across
- Moved or conveyed by or through air
- 6 Across
- Any sensation or change in bodily function that is experienced by a patient and is associated (plural)
- 8 Across
- Gas in the air that we need to breathe
- 12 Across
- An odorless very poisonous gas that is a product of incomplete combustion of ___
- 14 Across
- Substance used in or made by chemistry (plural)
- 16 Across
- A heavy odorless colorless gas formed during respiration and by the decomposition of organic
- 1 Down
- The fine spores that contain male gametes and that are borne by an anther in a flowering plant
- 2 Down
- Gases ejected from an engine as waste products
- 3 Down
- A mixture of gases required for breathing
- 5 Down
- Undesirable state of the natural environment being contaminated with harmful substances as
- 7 Down
- Either of two saclike respiratory organs in the chest of vertebrates (plural)
- 9 Down
- A colorless gas soluble in alkalis and cold water
- 10 Down
- Layer of air around the Earth
- 11 Down
- How well your body and mind are doing
- 13 Down
- Air pollution by a mixture of smoke and fog
- 15 Down