Some Chemistry and a few Physics Practice Questions

Some Chemistry and a few Physics Practice Questions for the GHSGT PICK UP A REMOTE… PLEASE DO NOT TURN THEM ON NOR ENTER ANY NUMBERS UNTIL YOU ARE INSTRUCTED TO DO SO!

What is the final step in the scientific method? A. ) identify the problem B. ) restate the hypothesis C. ) draw conclusion D. ) develop a theory

“Be sure to wear eye protection at all times in the lab” is known as a(n) A. ) safety procedure B. ) step in the scientific method C. ) observation D. ) laboratory theory

In science, what steps are followed to solve a problem? A. ) laboratory rules B. ) deductive reasoning C. ) data analysis D. ) the scientific method

Which of the following is not a part of laboratory research? A. ) conduct meaningful research B. ) become aware of surroundings C. ) compile data collected D. ) gather information through observation and experiments

The earth’s crust is composed of about 49% oxygen, 26% silicon, 7% aluminum, 5% iron, 3% calcium, 3% sodium, 3% potassium, and 4% other substances. Which would be the best way to present this information? A. ) line graph B. ) pie graph C. ) dot graph D. ) bar graph

Instant coffee crystals are prepared for breakfast by stirring them into boiling water. Water is the? A. ) solute B. ) solvent C. ) compounding agent D. ) heterogeneous agent

How is a mixture different from a compound? A. ) a mixture can be separated into its parts through physical action, but a compound can only be separated into its parts by chemical reaction B. ) a mixture can contain many elements, but a compound can contain only two elements C. ) a mixture can be always be separated into its parts with a magnet, but heat must be applied before a compound can be separated D. ) a mixture is a man-made substance, while a compound is a naturally occurring substance

You would like to conduct an experiment to test a variety of liquids to see if they are acidic. What supplies will you need? A. ) filter paper, beaker B. ) eudiometer, beaker, clamp C. ) litmus paper, stirring rod D. ) buret, Erlenmeyer flask, clamp

What part of a science textbook lists the page number where a chapter on weather begins? A. ) appendix B. ) glossary C. ) preface D. ) table of contents

10. You have been collecting data to determine average monthly rainfall for a particular year. You have 25 random samples recorded in milliliters for each month. You want to show rainfall trends over the year. What would be the best way to represent your data to illustrate each month’s average rainfall? A. ) On a calendar, with the samples written on the days they were taken. B. ) On a bar graph, with each bar representing the average of 25 samples for a particular month. C. ) In a brief but descriptive paragraph that includes your methods and general findings. D. ) On a data table, with the months labeled along the top and 25 samples written below each, averaged at the last row.

#11. Dr. Chase wants to write an analysis of several pieces of literature she reviewed pertaining to heart disease. What will Dr. Chase be attempting to do in her analysis? A. ) Dr. Chase will make a judgment on the literature based on her own professional opinion. B. ) Dr. Chase will review the literature according to the criteria set forth in the literature itself. C. ) Dr. Chase will record observations of heart disease under carefully controlled conditions. D. ) Dr. Chase will ignore the degree of closeness between the measured values and the true values of statistics in her literature review.

#12. Which of the following is the purpose of an experimental group? A. ) Experimental groups are groups designed with variable conditions to test the hypothesis. B. ) An experimental group is a process designed to yield observations under carefully controlled conditions. C. ) An experimental group is a judgement or decision based on experimentation. D. ) Experimental groups are the results of an investigation or experiment.

#13. How should a meniscus be read in a graduated cylinder filled with water? A. ) The meniscus should be read with a magnifying glass. B. ) The meniscus should be read from the top of the curve. C. ) The meniscus should be read from left to right. D. ) The meniscus should be read from the bottom of the curve.

#14. What is the correct conversion of 5. 32 m to km? A. ) 0. 0532 km B. ) 5320 km C. ) 0. 00532 km D. ) 532 km

#15. A= l x w. A=area, l=length, and w=width. What is the area of a building that is 50 m long and 20 m wide? A. ) 2. 50 m 2 B. ) 1000 m 2 C. ) 70 m 2 D. ) 100 m 2

#16. V= l x w x h. V=volume, l=length, w=width, h=height. 1 cm 3=1 m. L. What is the liquid volume in milliliters of a cube that is 3. 0 cm long, 4. 0 cm wide, and 6. 0 cm high? A. ) 13 m. L B. ) 62 m. L C. ) 72 m. L D. ) 2. 0 m. L

#17. A beaker is filled with 20 m. L of water. A rock is dropped in the beaker, raising the water level to 37 m. L. What is the volume of the rock? A. ) 57 m. L B. ) 1. 85 m. L C. ) 740 m. L D. ) 17 m. L

#18. D= m/v. D=density, m=mass, and v=volume. A piece of coal has a mass of 46 grams and a volume of 28 m. L. What is the density of the coal? A. ) 18 g/m. L B. ) 1300 g/m. L C. ) 1. 6 g/m. L D. ) 0. 61 g/m. L

#19. Air has the same concentration of oxygen throughout a room. This is an example of a(n)_____. A. ) Element. B. ) Pure substance. C. ) Compound D. ) Solution.

#20. Why is chemistry considered a physical science? A. ) Physical science is a study of motion, chemistry is the study of moving galaxies in space B. ) Physical science is the study of matter and energy, chemistry is the study of plant and animal energy C. ) Physical science is study of life, chemistry focuses on the study of living matter D. ) Physical science is the study of matter and energy, chemistry focuses on the study of matter and changes in matter

21. As a car battery is used, the terminals exposed to air start to corrode. Corrosion is an example of a(n) _____ change. A. ) chemical B. ) biological C. ) physical D. ) electrical

22. Nickels, dimes, and quarters are in a piggy bank. This is an example of a _____ mixture. A. ) homogeneous B. ) chemical C. ) saturated D. ) heterogeneous

23. Pewter, an alloy made of 90% tin, 7% antimony, and 3% copper is known as a A. ) liquid solution B. ) heterogeneous mixture C. ) solid solution D. ) liquid mixture

24. The nucleus of an atom contains: A. ) DNA B. ) protons and electrons C. ) neutrons only D. ) protons and neutrons

25. If a 0. 1 M acidic solution of basic solution of 0. 1 M are combined in equal amounts, what will be the action and result of the combination? A. ) Action: neutralization, Outcome: water B. ) Action: chemical reaction, Outcome: O 2 and CO 2 C. ) Action: dissociation, Outcome: stronger acids and bases D. ) Action: titration, Outcome: change in the color of the combined solution

The atomic number for radon is 86, and the atomic mass is 222. How many neutrons does radon have? A. ) 2. 58 B. ) 43 C. ) 136 D. ) 308

27. Which of the following is an element? A. ) water B. ) gold (24 K) C. ) sugar D. ) aluminum oxide

28. How many valence electrons make most atoms stable? A. ) 2 B. ) 8 C. ) 13 D. ) 25

29. In CO 2, the subscript 2 represents the number of A. ) electrons B. ) carbon dioxide molecules C. ) carbon atoms D. ) oxygen atoms

#30. Which qualities correctly distinguish metal from nonmetals? A. ) Nonmetals conduct heat better and a higher luster than metals. B. ) Metals often contain more than four electrons in their outer shell. Nonmetals have one to three electrons in their outer shell. C. ) Metals conduct heat better and have a higher luster than nonmetals. D. ) Nonmetals are all gases while metals are all solids.

31. Why is the atomic mass of an element greater than the atomic number? A. ) The atomic mass includes both protons and neutrons. The atomic number contains the protons only. B. ) The atomic mass includes both neutrons and electrons. atomic number counts only the electrons. C. ) D. ) The atomic number counts the number of photons. The atomic mass counts the number of photons and atoms. The atomic number counts the number of ions. The atomic mass counts the number of ions and isotopes. The

32. Use Ohm’s law V=IR, where V=voltage, I=current and R=resistance, to determine the resistance of the load in the following circuit. V=3 and I =1 A. ) 0. 3 ohms B. ) 0. 8 ohms C. ) 3 ohms D. ) 3 R

33. In electric circuits, what type is present in most homes? A. ) Parallel B. ) Series C. ) DC D. ) Static

35. A good way to generate static electricity is to: A. ) rub a rubber rod with wool B. ) rub a wire on a magnet C. ) turn a magnet in a coil of wire D. ) rub two pieces of wool together

35. Technically, noise is defined as: A. ) any loud sound B. ) irregular vibrations at irregular intervals C. ) a compressional wavelength with a large amplitude D. ) any sound that falls between the range of 100 to 1, 000 decibels

36. Which characteristic is associated with alpha radiation? A. ) the ability to gain or lose an electron B. ) the capability of penetrating 5 inches of lead shielding C. ) low energy helium nuclei D. ) the ability to produce X-rays

37. Radioactive materials (such as uranium and plutonium) have been linked with cancer and genetic defects, both of which are known to be caused by changes within the cell. How does radioactivity affect living cells? A. ) Radio-length waves emitted from radioactive elements constantly bombard the cell, causing changes B. ) Uranium and plutonium replace normal elements in certain proteins, either causing birth defects or initiating cancer C. ) Alpha, beta, or gamma radiation can change the molecular composition of a chromosome or other cell structure, thus causing the cell to change

38. Which would be the best example of kinetic energy? A. ) batteries on a shelf B. ) batteries in a flashlight that is turned off C. ) batteries rolling off of a desk D. ) batteries in a flashlight that is turned on

39. Bob picked up two eggs from the table. One slipped out of his hand as he picked it up and hit the table but did not break. The egg then rolled off the table and fell on the floor, where it broke. Which principle of physical science best explains why the egg broke on the floor but not on the table? A. ) The floor was harder than the table. B. ) The first fall cracked the egg so that it would break the next time it hit something C. ) As the egg fell to the floor, it encountered friction with the air which made it easier to break D. ) The egg that hit the floor had more kinetic energy available to do work on the egg.

40. Convection is defined as a type of heat transfer in which A. ) heat is transferred by the movement of a fluid. B. ) a liquid acquires enough heat to change to a gas. C. ) temperature changes are measured only in Kelvin degrees. D. ) thermal energy is transferred by the direct contact of one molecule to another.