When does a cold front develop?

when a cold air mass invades a warm air mass

when two masses of warm air meet

when two masses of cold air meet

when a warm air mass invades a cold air mass

Which of the following is a behavioral adaptation of the Venus fly trap? A. leaves that close when touched B. leaves that perform photosynthesis C. roots that the plant uses to obtain water D. flowers to attract pollinators

A rock that forms from cemented pieces of rock is described as which of the following? mafic felsic clastic non-clastic

What is a similarity between an atom and a cell?

The maximum allowable concentration of pb2 + ions in drinking water is 0.05 ppm (i. e., 0.05 g of pb2 + in 1 million grams of water).

A 2-kg box is pushed from rest to a speed of 29.7 m/s in 21 seconds. What is the power require to accelerate the box.

Drinking water may contain a low concentration of lead ion (Pb2) due to corrosion of old lead pipes. The EPA has determined that the maximum safe level of lead ion in water is 15 ppb.

A student examines the temperature and precipitation on a given day using a thermometer and a rain gauge. The student is measuring- A. temperature only B. climate only C. wind speed only D. specific weather conditions

Atoms - 1 2 3 4 Protons - 8 10 9 8 Neutrons - 10 9 9 11 Electrons - 8 10 9 8 Which two are isotopes of one another?

A radioactive isotope has the same number of protons as its stable parent atom, but differs in its number of what?

A student experimentally obtained the density of osmium the densest element as 22.57g/cm3 the density of osmium is reported to be 22.48 g/cm3 determine the student percent error