When an atom loses an electron, it becomes a

a. positive ion.

b. negative ion.

c. neutral ion.

d. neutral atom.

Which statements describe the moment magnitude scale? Select three options. It measures only small earthquakes. It collects data using a seismograph. It shows the types of seismic waves that were produced.

A hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. She hears the echo 2.0 after shouting. Estimate the length of the lake in meters

Which of the fallowing is a chemical change? A. Rocks being smoothed by rapid water movement. B. The pink color of a rose. C. Iron's attraction to a magnet. D. Decomposition of stone due to acid rain.

A 5.00 l tank contains helium gas at 1.50 atm. what is the pressure of the gas in mmhg? a. 1.50 mmhg b. 760 mmhg c. 3800 mmhg d. 1140 mmhg e. 507 mmhg review

The space program has had no fatalities. a. True b. False John Glenn was the first American to orbit the earth. a. True b. False In 1964 Martin Luther King, Jr., was awarded: the Pulitzer Prize the Nobel Peace Prize the Distinguished American Medal

A long distance runner has an average speed of 4m/s during a race. How far does the runner travel in 20 minutes?

Density is calculated by dividing

The one island species evolved into three different species. This is called?

Find the components of vector M shown in figure 5-7

Electrical current is actually made of a. static charges. b. moving electrons. c. high or low voltage. d. resistance within a circuit.