Q2 Exam Review

Objects with a density of 1g/cm^3 or less will float in water. The following graph shows the density of selected minerals. Based on the data, what prediction can be made?

• all of the minerals will float

• only Pyrite will float

• only Sandstone will float

• none of the minerals will float

Charles Darwin sailed to the Galapagos Islands on the HMS Beagle. He observed that similar birds had different markings on different islands Darwin developed a theory based on his observations about how natural selection occurred. He later published a book about his ideas that became the basis for the Theory of Evolution.

How did Darwin's work influence scientific knowledge concerning evolution?

• The theory of natural selection revised old theories, so scientists no longer had to study how species change over time.

• The theory of natural selection provided scientists with new interpretations of how species change over time.

• The theory of natural selection revised scientists' thoughts on island habitats since these are the only places where species change over time.

• The theory of natural selection provided scientists with an interesting idea of how species change but lacked any explanation for how this takes place.

Sound waves travel at different speeds through different materials. Which sound wave would travel at the fastest speed?

• sound generated by fireworks that explode in the sky

• sound waves generated by an earthquake that shakes the ground

• sound waves generated by a thunderstorm

• sound generated by whales communicating with each other in the ocean.

Kareem told his friend about the beautiful rainbow he saw just after a rainstorm. Kareem then explained to his friend how a rainbow forms. What was Kareem's explanation?

• Light traveled faster after the rainstorm because of the moisture in the air.

• Tiny droplets of water reflected the light waves that struck them.

• The light waves were refracted by moisture in the air and separated into colors.

• The intensity of light increased as the waves passes through tiny droplets of water.

Light waves travel at different speeds through different materials. Which list shows the correct order of increasing speed of light waves in materials, from slowest to fastest?

• Solids--> Liquids-->Gases

• Gases--> Liquids --> Solids

• Gases--> Solids--> Liquids

• Liquids--> Solids-->

How do scientists use the fossil record as evidence for the scientific theory of evolution?

• The fossil record provides evidence of all species that have ever existed.

• The fossil record provides evidence that extinct species share similarities with current species.

• The fossil record provides evidence that all extinct species became fossilized at the same time.

• The fossil record provides evidence that extinct species are genetically identical to current species

How do fossils support the theory of evolution?

• by always being identical to an organism alive today

• by giving a complete timeline record of all ancient organisms

• by serving as evidence of all forms of organisms over time

• by providing evidence that modern organisms are related to ancient organisms

Even though the fossil record is incomplete, it can still be used to support the theory of evolution. Which of these statements is NOT a way the fossil record provides this support?

• The fossil record shows how different species are related.

• The fossil record shows when specific traits arose in a species.

• The fossil record shoes how one species changes into another.

• The fossil shows intermediate species that link other species together.

During his voyage to the Galapagos Islands, Charles Darwin observed 13 finches, a type of bird species living on different islands. Each bird species had its own unique beak structure. Which of these is the MOST reasonable conclusion to make based on Darwin's observations?

• Finch beaks were adapted based on climate.

• Finch beaks were adapted based on latitude.

• Finch beaks were adapted based on food supply.

• Finch beaks were adapted based on mating needs.

Which of these statements BEST describes the connection between biodiversity and evolution?

• The more biodiversity an area has, the greater the chances of a new species emerging.

• If biodiversity is high more predation will take place, preventing species from evolving.

• Organisms are more likely to survive with less biodiversity, so they have more time to adapt.

• Evolution depends upon low biodiversity to keep population sizes down, which increases numbers of genes.