In early civilizations, the ____________________ and ____________________ were people who had to travel to get food
Fill in the blank(s) with correct word
hunters, gatherers
gatherers, hunters
You might also like to view...
Spark ignition is important for roof top or package units located outdoors because of ____________________ problems.
Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT true?
A reaction A+B?C occurs in the liquid phase. A vessel contains a liquid at P = 1 MPa and T = 298.15 K. The vessel initially contains 10 moles of A and 10 moles of B, but the reaction is allowed to reach equilibrium at P = 1 MPa and T = 298.15 K. After the reaction reaches equilibrium, the pressure is reduced isothermally until it reaches 0.13 MPa, at which point the first bubble of vapor forms. The liquid at this point is 39 mol% A, 39 mol% B and 22 mol% C. The first bubble of vapor is 52 mol% A, 40 mol% B and 8 mol% C.
Vegetation in a pond or lake is important, but there can be too much of a good thing. How much of the pond surface
can be covered by vegetation before problems begin to occur?
What will be an ideal response?Chemicals are ______________________ according to how severe a hazard they present
Fill in the blank(s) with correct word