ASVAB Study Guide

ASVAB Study Guide Bone is composed primarily of which inorganic material? a. calcium b. phosphorus c. collagen d. potassium Ans-Calcium Calcium is the most abundant mineral found in bones, as well as in the entire body. Which of these is a biome? a. desert b. cornfield c. hear of bison d. beehive Ans-Desert A biome is a large ecological community that includes specific plants and animals, such as a desert. Which planet orbits closest to Earth? a. Mercury b. Venus c. Jupiter d. Saturn Ans-Venus Venus's orbit is closest to Earth. Venus is the second planet from the sun, and Earth is the third planet from the sun. What is the name of the phenomenon when a star suddenly increases in brightness and then disappears from view? a. aurora b. galaxy c. black hole d. supernova Ans-Supernova Before a star collapses, the star burns brighter for a period of time and then fades before view. This is a supernova. Which organism has cells that contain mitochondria? a. whale b. mushroom c. tulip d. all of the above Ans-All of the above Plant, animal, and fungi cells have mitochondria. Isotopes of an element will have the same number of _______ and different numbers of ________? a. electrons; neutrons b. neutrons; electrons c. protons; neutrons d. protons; electrons Ans-Protons; neutrons Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons. What condition can be diagnosed by an electrocardiogram (EKG)? a. diabetes b. torn ligaments c. cancer d. tachycardia Ans-Tachycardia Tachycardia is an abnormally fast heart rate, and electrocardiogram shows the electrical activity of the heart. What are the negatively charged particles inside an atom? a. protons b. neutrons c. electrons d. ions Ans-Electrons Electrons are negatively charged particles in an atom; electrons orbit the nucleus. Which organism regulates its body temperature externally? a. lobster b. dolphin c. whale d. pelican Ans-Lobster The metabolic rate of crustaceans is too low to regulate their temperature. Crustaceans use behavioral techniques, such as moving to shallow water, to maintain body temperature. A box sliding down a ramp experiences all of the following forces EXCEPT? a. tension b. friction c. gravity d. normal Ans-Tension Tension is the force that results from objects being pulled or hung. Which organism is a decomposer? a. apple trees b. mushrooms c. goats d. lions Ans-Mushrooms Mushrooms are fungi. Fungi break down organic material left by dead animals and plants making them decomposers Which pH level is classified as a base? a. 1 b. 4 c. 6 d. 8 Ans-8 Bases have a pH between 7 and 14. Which body system is responsible for the release of growth hormones? a. digestive system b. endocrine system c. nervous system d. circulatory system Ans-Endocrine system The endocrine system releases hormones, including growth hormone. What is the term for the top layer of the earth's surface? a. exosphere b. lithosphere c. atmosphere d. biosphere Ans-Lithosphere The lithosphere is the top layer of the earth's surface. Which of the following describes a physical change? a. water becomes ice b. batter is baked into a cake c. an iron fence rusts d. a firecracker explodes Ans-Water becomes ice When water changes form, it does not change the chemical composition of the substance. Once water becomes ice, the ice can easily turn back into water. Which energy source is nonrenewable? a. water b. wind c. coal d. sunlight Ans-Coal Coal is nonrenewable because once coal is burned, it cannot b