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OR - 2002-2003 Science - Grade 10

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  • A ROAD RACE Some students are taking part in a community running race. Five minutes into the race, what happens in the students’ circulatory system?

    The heart pumps more blood to the legs.
    The muscles start to tighten.
    Fluids pour into the stomach.
    The lungs need more air.


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  • A ROAD RACE Some students are taking part in a community running race. Ten minutes into the race, the students are perspiring or sweating. Which human body system is now involved?

    Nervous system
    Respiratory system
    Skeletal system
    Integumentary system


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  • A ROAD RACE Some students are taking part in a community running race. One of the students falls and sprains an ankle. A part of which system is now injured?

    Circulatory system
    Respiratory system
    Skeletal system
    Nervous system


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  • A ROAD RACE Some students are taking part in a community running race. Several students get sunburned during the race. The skin is an organ in which human system?

    Circulatory system
    Integumentary system
    Skeletal system
    Respiratory system


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  • Alfredo and his friends rode their bikes on a bike path. The path was perfectly level, except where it went up over a small bridge and then came back down. There was no wind. The picture below shows a side view of the shape of the path they followed. They had a contest to see who could coast the farthest. They pedaled as fast as they could from point 1 to point 2, and then they stopped pedaling and coasted to a stop at point 7. Of points 3, 4 and 5, at which point did their bikes travel fastest?

    3
    4
    5
    They went about the same speed at all three points.


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  • Alfredo and his friends rode their bikes on a bike path. The path was perfectly level, except where it went up over a small bridge and then came back down. There was no wind. The picture below shows a side view of the shape of the path they followed. They had a contest to see who could coast the farthest. They pedaled as fast as they could from point 1 to point 2, and then they stopped pedaling and coasted to a stop at point 7. Which of the following would NOT have helped them coast farther?

    Crouching low over their bikes while coasting.
    Swerving their bikes from side to side
    Pumping more air into their tires.
    Oiling the wheel bearings.


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  • Alfredo and his friends rode their bikes on a bike path. The path was perfectly level, except where it went up over a small bridge and then came back down. There was no wind. The picture below shows a side view of the shape of the path they followed. They had a contest to see who could coast the farthest. They pedaled as fast as they could from point 1 to point 2, and then they stopped pedaling and coasted to a stop at point 7. They were going faster at point 5 than at point 4 because of what energy change?

    From chemical energy to mechanical energy
    From kinetic energy to heat
    From kinetic energy to mechanical energy
    From potential energy to kinetic energy.


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  • Alfredo and his friends rode their bikes on a bike path. The path was perfectly level, except where it went up over a small bridge and then came back down. There was no wind. The picture below shows a side view of the shape of the path they followed. They had a contest to see who could coast the farthest. They pedaled as fast as they could from point 1 to point 2, and then they stopped pedaling and coasted to a stop at point 7. Their bikes were accelerating between points

    1 and 2.
    2 and 3.
    3 and 4.
    5 and 6.


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  • The Friends of Nature youth club has been studying a local greenbelt area for several years. The plants and land shapes in the area have changed very little, except that a very strong wind about a year ago blew down nearly all the large dead trees. Some of the other things the club has learned are shown in the table. The club has decided to investigate the population changes shown in the table. To explain the decline in the squirrel population, they should first investigate

    changes in the fox population.
    dwindling food supply.
    increase in the duck population.
    loss of a safe nesting area.


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  • The Friends of Nature youth club has been studying a local greenbelt area for several years. The plants and land shapes in the area have changed very little, except that a very strong wind about a year ago blew down nearly all the large dead trees. Some of the other things the club has learned are shown in the table. The club has decided to investigate the population changes shown in the table. The club could well predict that the change in the duck population might be due to reduction in

    habitat.
    number of squirrels.
    trees.
    predators.


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  • Typically, sedimentary rocks are formed

    from materials that settle.
    only in volcanoes.
    only under great pressure.
    below Earth’s surface as magma.


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  • While digging, a person found that most of the rocks were igneous rock. What can be concluded?

    The rocks were probably carried there by ancient people.
    The area was once covered by an ocean.
    A glacier passed through at one time.
    A volcano was nearby at one time.


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  • A stream will probably deposit the most sand and silt where the stream bed is

    narrow and level.
    narrow and steep.
    wide and level.
    wide and steep.


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  • Compared to coastal areas, interior areas of a large continent tend to have

    higher amounts of rainfall throughout the year.
    a greater incidence of fog during summer months.
    an increased risk of hurricanes during the spring months.
    more extreme temperature differences between winter and summer.


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  • A small ball is dropped down one end of a pipe. When air is blown in from the opposite end, the ball stops in the pipe. Which is a probable explanation?

    The pipe fills with air which will keep anything from falling through it.
    Gravity’s pull is less inside the pipe than outside the pipe.
    The ball is made of very lightweight plastic.
    The force of the air on the ball balances the pull of gravity.


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  • You want to measure the volume of a rock. The best way to do this is with

    a ruler, water and a balance.
    a beaker and water.
    a beaker, a hot plate and water.
    a beaker, a graduated cylinder and water.


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  • The formation of metamorphic rocks depends on all of the following EXCEPT

    the composition of the parent rocks.
    Earth’s magnetic field.
    temperature.
    pressure.


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  • Look at the diagram. Each circle shows one state of matter. The arrows show ways that matter might change state. For example, arrow 2 shows that matter can change from a liquid to a gas. A pan of water boiling on a stove would match arrow 2. Heating a substance almost never causes the change shown by arrow

    1
    2
    3
    4


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  • Which energy change is usually made directly?

    Sound to light
    Mechanical to nuclear
    Light to heat
    Sound to electrical


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