They respond to danger by diving rather than flying, and are in any case much less wary than ducks. Extant species range in size from the least grebe, at 120 grams (4.3 oz) and 23.5 cm (9.3 inches), to the great grebe, at 1.7 kg (3.8 lbs) and 71 cm (28 inches).hey respond to danger by diving rather than flying, and are in any case much less wary than ducks. Extant species range in size from the least grebe, at 120 grams (4.3 oz) and 23.5 cm (9.3 inches), to the great grebe, at 1.7 kg (3.8 lbs) and 71 cm (28 inches).
Noun. 1. productivity-the quality of being productive or having the power to produce. productiveness. fruitfulness, fecundity-the quality of something that causes or assists healthy growth.
1 70-72ÂºF (21-22ÂºC) is the temperature range that will make you the most productive. 2  Any temperature above 73Âº decreases your productivity. 3  At 86Âº and above, your productivity drops to about 90% of what it was before, a 10% decrease. 4  Any temperature below 68Âº also decreases your productivity.ereâs what the research shows: 1  70-72ÂºF (21-22ÂºC) is the temperature range that will make you the most productive. 2  Any temperature above 73Âº decreases your productivity. 3  At 86Âº and above, your productivity drops to about 90% of what it was before, a 10% decrease.