8th Grade Science EOG Review Part VI: Question Preview (ID: 14028)

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How do scientists know that some mountains were once at the bottom of an ocean?
a) freshwater rivers flow to the ocean
b) saltwater fish are found in some mountain streams
c) dinosaur bones have been discovered in the mountains
d) marine fossils have been found on the peaks of some mountains

What is the cause of malaria?
a) a virus
b) a bacterium
c) a fungus
d) a parasite

How can the rate of an infectious disease be drastically reduced?
a) by taking medication daily
b) by preventing transmission between people
c) by wearing clean clothing daily
d) by performing dental hygiene three times a day

What is involved in creating genetically modified bacteria?
a) allowing them to reproduce freely
b) changing their food source
c) using biotechnology techniques
d) growing them on selected plants

In a food pyramid, which best explains why the number of organisms decreases from one trophic level to the next?
a) consumers at the lower level require more energy than the top-level consumers
b) consumers at the top-level require more energy than the lower level consumers
c) the consumers are feeding on larger organisms that have less energy
d) the consumers are feeding on smaller organisms that have less energy

What process is responsible for the extinction of most species of plants and animals that have lived on Earth?
a) gene mutation
b) environmental changes
c) selective breeding
d) decrease in reproduction

What would indicate that a series of fossils represent the evolution of the horse?
a) all of the fossils were found in the same layers of rocks as horse fossils
b) all of the fossils are completely identical to horse bones
c) all of the fossils show similar structures to that of the modern horse
d) all of the fossils were located in the same place on Earth as horses

Which would enable strawberries to survive a hard freeze?
a) They have larger leaves to protect the fruit than the other strawberries
b) They have different genetic variations that cause them to be more resistant to cold temperatures
c) They are able to reproduce more quickly than other strawberries
d) The color of the strawberries is darker, so they maintain their temperature better

Which food provides the most energy for the body in the shortest amount of time?
a) potato
b) meat
c) milk
d) fruit

Why is protein an important part of a healthy diet?
a) it is needed to change glucose to energy
b) it is needed to store nutrients
c) it is needed to repair tissue
d) it is needed to produce water

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