Solve these clues to fill the grid.
- Physical activity that keeps you fit
- 6 Across
- An essential structural component of living cells and source of energy for animals (plural)
- 7 Across
- A fertilizer that is derived from animal or vegetable matter
- 8 Across
- Nutrient in meat and beans that builds muscle
- 10 Across
- Depending on free oxygen or air
- 11 Across
- The act of physically reaching or thrusting out
- 13 Across
- Solid homogeneous inorganic substances occurring in nature having a definite chemical composition (plural)
- 14 Across
- A physician who specializes in ___
- 15 Across
- A polyhedron having a polygonal base and triangular sides with a common vertex
- 1 Down
- Clear liquid we drink that falls as rain
- 2 Down
- Tiny single-celled living things, some of which cause illness
- 3 Down
- A chemical compound that is added to protect against decay or decomposition (plural)
- 4 Down
- A component of a mixture or compound
- 5 Down
- Greasy substance in food and body tissue
- 9 Down
- A unit of heat equal to the amount of heat required to raise the temperature of one kilogram
- 12 Down
- A silvery soft waxy metallic element of the alkali metal group
- 15 Down
