The half-life of carbon-14 is 5,730. What fraction of carbon-14 would remain after 11, 460 years?

Describe two changes of state that releases energy

True or false nonnative species can harm some populations in an ecosystem?

A ski lift carries people along a 220 meter

Describe how astronomers determine the composition of a star.

Suppose a log's mass is 5 kg. After burning, the mass of the ash is 1 kg. What can you predict has happened to the other 4 kg?

A car is traveling 80 km/h if the car's speed remains constant how far will it have traveled in 3 hours a. 3km b. 26.7km c. 80 km d. 240 km

True or False? Gases such as water vapor condense when they are * heated*.

If a chromosome on unfolds itself how is transcription enhanced

Two friends, barbara and neil, are out rollerblading. with respect to the ground, barbara is skating due south at a speed of 5.9 m/s. neil is in front of her. with respect to the ground, neil is skating due west at a speed of 1.4 m/s.

What process is used when the sun transfers light to plants A. conduction B. radiation C. convection D. all of these