Based on the graph, determine the amount of U-238 that would remain after 4.5 billion years, if the original sample contained 6 grams of pure U-238.

A) 0.75 grams

B) 3 grams

C) 6 grams

D) 12 grams

is the thermal energy that flows from one substance to another when the substances differ in temperature.

Why does Earth have a liquid water supply and the moon does not? A. The moon does not have a magnetic field B. Earth is much colder than the moon C. Earth was bombarded with comets D. The moon does not have strong enough gravity

Referring to lab 4.04 part one what percent of the offspring will be heterozygous for pink flowers

Which of the following best describes a process of erosion? A. Rocks along the coast are broken up by waves crashing into the shore. B. The wind lays down sediment to form small hills called dunes. C.

This is a regulation of the internal environment of an organism definition

What cell structure would a leaf or a tree have that a fingernail wouldn't A. mitochondria B. Cilia C. chloroplasts D. ribosomes

Which phrase defines a law? a possible explanation or answer to a scientific question that is based on prior knowledge or research and is testable A statement of fact that is generally accepted to be true and universal because it has always been

Which vessels allows for oxygen movement into the tissues

What is the difference between a physical and a chemical change

What is described by binary fission? A) The way prokaryotes move. B) The way prokaryotes produce energy. C) The way prokaryotes reproduce. D) The way prokaryotes digest nutrients.