# Final Test - Physical Science

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Holt Physical Science Chapter 8: Work and Machines Chapter Exam Question 1 How much power is required to do 100 J of work in 10 s? 100 W 1W 5W 10 W 20 W Question 2 Which one of the formulas best describes ''power''? Work / time Force x distance Force / distance Force / time Work x time

Question 3 Which of the following scenarios will most likely require MORE power? Less work, less time None of the answers are correct. More work, less time Less work, more time More work, more time Question 4 To do twice as much work in the same amount of time, how much power is required? The same amount Four times as much Three times as much Two times as much Half as much

Question 5 How is it possible to have less input force but more output force? The input distance is decreased The output distance is increased The input distance is increased The input work is increased The input work is decreased Question 6 What does the law of conservation of energy state? Energy cannot change forms Energy can be created but not destroyed Energy cannot be transferred between objects Energy can be neither created nor destroyed Energy can be destroyed but not created

Holt Physical Science Chapter 9: Energy and Energy Resources Chapter Exam Question 1 Which of the following statements is NOT true? Direct current does not change direction as it flows Alternating current changes direction as it flows Motors produce mechanical energy from electrical energy A generator can be turned into a motor by reversing the movement of the internal components Generators produce electrical energy from mechanical energy Question 2 What color of visible light does chlorophyll reflect? Blue Red Green Violet

Question 3 Why is hydroelectric energy from water considered a renewable resource? New water cannot be created It is impossible to use up all of the Earth's water The water regenerates as it passes through the dam The water is not actually taken out of the system Question 4 All of the following represent challenges to solar energy EXCEPT? The sun is an inconsistent energy source. Solar cells are expensive to install and maintain. Solar energy is difficult to store. Solar energy produces greenhouse gases like carbon dioxide. Adequate sunshine is not available in all areas of the world. Question 5 The _____ is an underground concentration of hot water and steam that can be tapped into for energy production. Geothermal steam pump Geothermal pool Geothermal reservoir Geothermal energy

Question 6 How do renewable and non-renewable energy resources differ? A renewable resource regenerates after a short period of time, while a non-renewable resource cannot be regenerated. A renewable resource is available all year, while a non-renewable resource is available only in certain seasons. A renewable resource may be formulated in a laboratory, while a non-renewable resource is found only in nature. A renewable resource may be used only once, while a non-renewable resource can be recycled multiple times before it is used up. Question 7 Which of the following is characteristic of electrical fields? positive test charges would move away from a positive source all of these are correct the direction of the electric field points in the direction a positive test charge would move within the field electric fields surround charged sources positive test charges would naturally move towards a negative source Question 8 Select the set that contains the three major types of fossil fuels. Peat, coal, and oil Coal, firewood, and oil Coal, oil, and natural gas Firewood, coal, and natural gas

Holt Physical Science Chapter 12: The Periodic Table Chapter Exam Question 1 As you move from top to bottom on the periodic table, what generally happens to the ionization energy? it remains constant it decreases it increases it cannot be determined

Question 2 Which of the elements below has the highest ionization energy? barium (Ba) calcium (Ca) fluorine (F) carbon (C)

Holt Physical Science Chapter 13: Chemical Bonding Chapter Exam Question 1 If a carbon atom has four valence electrons, which of the following statements are TRUE? I. Carbon can form a triple covalent bond with another carbon atom. II. A carbon atom CANNOT form two double bonds simultaneously. III. A carbon atom can form four single covalent bonds simultaneously. III I I and II I and III II

Question 2 Which of the following statements are true? I. Noble gases complete their valence level by sharing electrons. II. Covalent bonds are weak and easily broken. III. Covalent bonds allow us to make predictions on how the molecule will look. II I II and III III I and III Question 3 When is it possible to form multiple bonds with the same partner atom? If the first bond is unstable If the atom has enough valence electrons It is not possible to form multiple bonds with the same partner atom If the atom does not have enough valence electrons