How do whales bats and dolphins use echolocation? to scare away predators, to orient themselves and to find food, to attract males, or to tell other animals of their species where they are?

From where does the nitrogen in the nitrogen cycle originate? a. root nodules of legumes b. the atmosphere c. decomposers d. nitrifying bacteria

Which of these is an example of climate

A 1.000-g sample of lead shot reacted with oxygen to give 1.077 g of product. Calculate the empirical formula of the lead oxide

A gas is contained in a thick walled balloon. When the pressure change from __ torr to 777 torr, the volume changes from 2.58 L to 1.53 L and the temperature changes from 368 K to 495 K

An airplane model is an example of what type of model

Sunlight produces a spectrum of colors that includes what?

Which of the following is not a common use of gypsum? a. wallboard/drywall for homes b. a primary ingredient for toothpaste c. surgical splints and casts d. pH reducing agent for acidic soils

In which of the following are the symbol and name for the ion given correctly A. NH4+: ammonia; H+: hydride B. C2H3O2-: acetate; C2O4-: oxalite C. OH-: hydroxide; O2-: oxide D. PO3 3-: phosphate; PO4 3-: phosphite

If you add a large piece of zinc to a beaker of acid and, in a separate beaker, zinc shavings to a beaker of acid (of equal concentration/volume), the sample with the zinc shavings will react faster than the sample with the large piece.

How many atoms of oxygen are in 0.100 miles of silicon dioxide, SiO^2