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CST Review 2 10 10 10 10 10 20 20 20 20 20 30 30 30 30 30 40 40 40 40 40 50 50 50 50 50 Chemistry of Living Systems 10 Points • An organic compound is a compound that contains this element. • What is carbon? Chemistry of Living Systems 20 points • The building blocks of proteins are A. lipids B. simple sugars C. nucleotides D. amino acids. • What is D. amino acids? Chemistry of Living Systems 30 points • This organic molecule is used to build and repair body parts and regulate cell activities.. • What are proteins? Chemistry of Living Systems 40 points • The building blocks of nucleic acids are A. nucleotides B. amino acids C. simple sugars D. fatty acids • What is A. nucleotides? Chemistry of Living Systems 50 points • The number of electrons a carbon atom has available to form chemical bonds. •• .What are four? Density 10 points • A student has measured the temperature, volume, weight, mass and viscosity of a sample of corn oil. Which of these measurements does the student need to find the density of the corn oil? • What is mass and volume? Density 20 points • A student measured a metal cube to find that the cube has a volume of 27 cm3. and a mass of 240.3 g. What is the density of this metal cube? • What is 8.9 g/cm3? Density 30 points • A 40-cm square piece of aluminum foil has a density of 2.6 g/cm3. A student cuts this piece of aluminum foil into four equal squares. What is the density of each piece? • What is 2.6 g/cm3? Density 40 points • Water has a density of 1.0 g/cm3. Which of the following substances will NOT float in water? A. ice (0.92g/cm3) B. pine wood (0.5 g/cm3) C. corn syrup (1.38 g/cm3) D. plastic (0.93 g/cm3) • What is C. corn syrup? Density 50 points • Water has a density of 1g/mL. Mercury has a density of 13.6 g/mL. Ethyl alcohol has a density of 0.802 g/mL. Mineral oil has a density of 0.914 g/mL. Predict the order if they were poured into the same container, starting with the bottom layer. • What is mercury, water, mineral oil, ethyl alcohol? Gravity 10 points • The force that acts between all objects in the universe. • What is gravity? Gravity 20 points • The measure of the force of gravity on an object. • What is weight? Gravity 30 points • As the distance decreases between two objects, the force of gravity does this. • What is increase? Gravity 40 points • What happens to an object in free fall. • What is it accelerates in a downward direction? Gravity 50 points • Why a ball on the moon will travel further than a ball on Earth. • What is because the moon has 1/6 less gravity and the ball will take longer to fall? Solar System 10 points • In the sun, nuclear fusion involves A. the splitting of helium atoms. B. the combining of hydrogen atoms to form helium C. the radiation of hydrogen atoms through helium atoms D. eruptions of hydrogen atoms on the sun’s surface. • What is B? Solar System 20 points • A light-year is a unit of A. mass B. time C. distance D. brightness • What is C. distance? Solar System 30 points • This planet is closest to the sun. • What is Mercury? Solar System 40 points • This is not a characteristic of all of the gas giants A. surrounded by rings B. many moons C. Composed mainly of hydrogen and helium D. Rocky surfaces –What is D. rocky surfaces? Solar System 50 points • Venus is sometimes considered to be similar to Earth. How are they alike? A. Same atmosphere B. Similar size and density C. Both are 0.72 AU from the sun D. Both take the same time to orbit the sun. • What is B. Similar size and density? Investigation and Experimentation 10 points • Which of the following is a hypothesis? A. What causes ice to melt? B. Physics is the best branch of science C. The results show that aluminum foil reduced friction D. Salt water boils faster than distilled water. • What is D? Investigation and Experimentation 20 points • The manipulated variable in an experiment is the variable that A. is not measurable B. changes in response to changes in other variables C. is kept constant D. is purposely changed. • What is D? Investigation and Experimentation 30 points • A student is testing whether the angle of an inclined plane will affect how fast a toy car will roll down it. Which is the manipulated variable? A. the type of toy car B. how far the toy car rolls C. the angle of the inclined plane D. how fast the car gets to the bottom. • What is C? Investigation and Experimentation 40 points • When making a conclusion, scientists: A. always find that the data supports the hypothesis B. are finished asking questions about their observations C. sum up what they have learned from the experiment D. form a hypothesis to explain the results. • What is C? Investigation and Experimentation 50 points • A student measures the volume of a 25-mL rock by measuring the amount of water it displaces. The student repeated the procedure 3X with these results: 29 mL, 29 mL, 29 mL. Are these results accurate, reproducible, both or neither? • What is accurate and reproducible?