According to the fossil record, how long did the transition from fully terrestrial to fully aquatic whales take?

The half life of Carbon 14 is 5500 years. How many years will pass for a 30 gram sample to reach 3.75 grams

The newest brain scanning technique which is popularly used is

California's San Andreas earthquake fault is what kind of plate tectonic boundary? A magma fault boundary Convergent plate boundary Transform fault boundary Divergent plate boundary

A woman with type O blood has children with her husband who is type AB. What percent of their children would you expect to have type O blood

Scientists use several processes to determine the age of rock layers and fossils in Earth. Which be used for absolute dating of fossils? 1Relative dating 2Radioactive dating 000 3The law of superposition 4Earthquake location

Transport of materials into a cell against a concentration gradient, from low to high, requires A) water. B) energy. Eliminate C) osmosis. D) a passageway.

As ocean water in a tide pool warms and evaporates, the remaining water becomes a. cooler. b. saltier. c. calmer. d. darker.

Drake is comparing time people spend playing games on Xbox versus Playstation. In his study, individuals ages 10 - 15 are given Xbox's and individuals ages 16 - 25 are given Playstations.

How do scientists obtain knowledge about the world? Check all that apply.

What would the temperature of the surface be if the Earth did not have an atmosphere?