7th Grade Science Common Exam Review: Question Preview (ID: 19496)


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As a roller coaster car travels down a hill, which type of change in energy allows it to speed up?
a) potential energy changing into heat energy b) potential energy changing into kinetic energy c) kinetic energy changing into heat energy d) kinetic energy changing into potential energy
A magnet is placed near a pile of steel paper clips. Which will most likely occur?
a) The magnet will provide a balanced force, causing the paper clips to spin in circles. b) The magnet will provide an unbalanced force, keeping the paper clips stationery c) The magnet will provide an unbalanced force, pushing the paper clips away from it. d) The magnet will provide an unbalanced force, pulling the paper clips toward it.
John wants to build a racetrack that will allow his toy cars to travel fast when force is applied. Which material should he use?
a) Carpet, because friction will be high b) gravel, because friction will be high c) plastic, because friction will be low d) sandpaper, because friction will be low
Sarah’s family has a long history of people who developed diabetes. Which change should she make to try and prevent becoming diabetic?
a) Watch television and drink water b) exercise frequently and watch her diet c) play video games and sit on the couch d) drink sodas daily and eat fried foods
Which term is given to the outward appearance of a particular trait in an organism
a) a genotype b) a phenotype c) an allelle d) a chromosome
A Father has Freckles due to being homozygous dominant FF. His children also have freckles but are heterozygous dominant for the trait. What is the unknown genotype and phenotype for the mother?
a) homozygous dominant with freckles b) homozygous recessive without freckles c) heterozygous with freckles d) heterozygous without freckles
Why would the offspring resulting from fertilization have more differences than the offspring resulting from budding?
a) Two parents provide all of their genes to their offspring during budding, unlike during fertilization b) Each parent provides half of its genes to its offspring during budding, unlike during fertilization c) Two parents provide all of their genes to their offspring during fertilization unlike during budding d) Each parent provides half of its genes to its offspring during fertilization, unlike during budding
Which form of energy does a car's engine convert into mechanical energy?
a) light b) wind c) chemical d) gravitational
Which type of energy is changed by plants into chemical energy?
a) solar b) thermal c) chemical d) gravitational
A dog runs for two seconds without stopping. After 1 second, the dog travels 6 meters. By the end of the next second, the dog has traveled an additional four meters. Which best describes the motion of the dog during the two seconds?
a) the dog slows down b) the dog speeds up c) the dog moves with a constant speed d) the dog changes directions
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