GED Science Practice Questions and Correct Answers Updated.

An alpha particle is composed of two protons and _______ neutrons. - Answer two (An alpha particle is also a helium nucleus.) 10 inches is equivalent to _____ cm. - Answer 25.4 (1 inch is 2.54 cm) When a moving charged particle is placed in a magnetic field, its direction will _____. - Answer change (The charge will feel a force, known as the Lorentz force, which will cause the particle to deviate.) A _______ bond is formed when atoms share electron pairs. - Answer covalent Microtubules are found in a cell's _____. - Answer cytoskeleton (Microtubules help maintain the cell's structure and are involved in many cellular processes.) Organic compounds always contain ____. - Answer Carbon Vitamins B and C are ____ soluble vitamins. - Answer water (These vitamins can be easily excreted through the urinary system.) The invisible, hypothetical matter that makes up most of the universe is known as ____ matter. - Answer dark The Milky Way is classed as a ____ galaxy. - Answer spiral 21% of the Earth's atmosphere is ____. - Answer oxygen The transfer of heat from objects that are in direct contact with one another is called ____. - Answer conduction The water cycle involves evaporation, condensation and ____. - Answer precipitation