MSL Science Review 10

Which best describes an ecosystem?

• all the living and non-living things in an area
• all the organisms of the same kind in an area
• a large area, such as a forest
• a place where many organisms live

Which describes one way that energy is transferred in a food chain?

• from one producer to another producer
• from a consumer to a producer
• from producer to consumer
• from a producer to the sun

Eelgrass is a major source of food for birds and turtles in an estuary.  What will most likely happen to the bird and turtle populations if people remove the eelgrass to build a bridge?

• The turtle population will increase, but the bird population will decrease
• Both the bird population and the turtle population will increase
• The bird population will increase, but the turtle population will decrease
• Both populations will decrease

How do bacteria most likely affect  birch trees in a forest?

• Bacteria add nutrients to the soil that birch trees need
• Bacteria help birch trees reproduce by spreading pollen
• Bacteria provide energy that birch trees need
• Bacteria help birch trees reproduce by spreading seeds

When a fern plant in placed near a window, the fern  grows toward the sunlight.  Which type of tropism is this an example of?

• simbiotic
• geotropism
• thigmotropism
• phototropism

A student rolls a ball down a smooth wooden ramp and observes what happens.  Then he puts sandpaper on the ramp and rolls the ball again.  What is the student most likely investigating?

• The effect of a change in gravity on the ball's motion
• The effect of a change in mass on the ball's motion
• the effect of the change of friction on the ball's motion
• the effect of a change in the ball's motion on the ramp

Which process describes water flowing down hill over the land surface?

• precipitation
• transpiration
• runoff
• condensation

A student is investigating how water changes from a liquid to a solid.  Which information would be best for the student to record in a data table?

• changes in the water's temperature
• changes in the waters weight
• changes in the water's shape
• changes the water's color

Michael measures the temperatures of copper, silver, steel, and gold wires before and after placing them in hot water.  Which idea is Michael most likely testing in his investigation?

• Many types of material besides metals are good conductors
• Many types of metals are good conductors
• Copper is a better conductor of heat than plastic
• Plastic is a better conductor than gold

Which best describes what happens when newspaper burns?

• new substance form
• substances get mixed together
• substances stay the same
• substances change state