2nd Nine Weeks Practice

Water has a density of 1 g/cm³. Which of the following will float in water?

• Ethyl Alcohol- 1.05 g/cm³

• pyrite- 2.3 g/cm³

• Oil- 0.7 g/cm³

• sandstone- 9 g/cm³

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

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

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

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

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

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

• sound waves generated by fireworks that explode in the sky

• sound waves generated by an earthquake that shake the ground

• sound waves generated by a thunderstorm

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

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 → gases

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

During his voyage to the Galapagos Islands, Charles Darwin observed 13 finches. 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 about natural selection is MOST accurate?

• Natural selection occurs as a completely random process

• Natural selection removes all negative traits from a population

• Natural selection ensures no chance of extinction o the population

• Natural selection occurs as useful traits are passed to offspring

Which of these statments 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

What is one way that Earth based telescopes are limited.

• they are more expensive to maintain then space telescopes

• the atmosphere makes their images less clear

• they are more likely to suffer damage that can't be fixed

• they are very temperature sensitive