Science: Question Preview (ID: 9139)


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An air hose extends above and below the surface of the water. Which statement explains why the hose would look broken?
a) Light is refracted as it moves from air to water. b) Light is reflected as it moves from air to water. c) Light is absorbed as it moves from air to water. d) Light is destroyed as it moves from air to water.
After a year, a pond containing a turtle, trout, sunfish, and a tadpole dries up, what organism in the pond ecosystem is able to take in oxygen?
a) turtle b) trout c) sunfish d) tadpole
In the winter, the pond starts to freeze. The ducks leave the pond. They migrate to warmer climates. Why?
a) The ducks have too many enemies. b) The ducks have difficulty finding food. c) The ducks have to lay eggs near water. d) The ducks have too few places to hibernate.
Which organism uses sunlight to produce food that others eat?
a) snail b) sunfish c) butterfly d) green algae
Which organism in the pond ecosystem completely changes its physical features and food source when it becomes an adult?
a) duck b) turtle c) trout d) butterfly
Which is the first step in a design process?
a) revise the solution b) describe the problem c) test the possible solution d) identify possible solutions
Sharpening a pencil and tearing a paper are examples of physical changes. Why?
a) There is a change in how the objects are used b) There is a change in the appearance of the objects c) There is a change in the materials from which the objects are made d) There is a change in both the appearance of the objects and the materials from which they are made
Fruit juice is in both a metal can and a plastic bottle in the same cooler. Why does the metal can feel colder than the plastic bottle?
a) The metal can holds colder juice than the plastic bottle b) Plastic is a better conductor of thermal energy than metal c) Metal is a better conductor of thermal energy than plastic d) The outside of the metal can is drier than the plastic bottle
A student places a ball on the ground and kicks it, why does it move?
a) The kick decreases the weight of the ball b) The kick applies a contact force to the ball c) The kick decreases the force of gravity acting on the ball d) The kick removes friction between the ball and the ground
A glass of water at 20 degrees C has an ice cube placed into it, it now is 12 degrees C and it melts, why?
a) The ice cube melts because cold flows out of the ice cube to the water b) The ice cube does not melt because cold flows into the ice cube from the water c) The ice cube melts because thermal energy transfers to the ice cube from the water d) The ice cube does not melt because thermal energy transfers from the ice cube to the water
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