Science Review Pt. 1

Which investigation is an example of repetition?

• Roll a marble down the ramp from a height of 10 cm, 20 cm, and 30 cm.

• Pour 50 milliliters of water down four inclined surfaces.

• Take the mass of five rocks separately and then determine the average mass in grams (g).

• Conduct four trials of counting the bubbles produced by a water plant for 1 minute (min) each.

Which of the following describes a limitation of the drawing but NOT the clay model?

• It does not represent the main parts of a cell.

• It does not contain the correct number of nuclei.

• It cannot represent a living cell, since a true cell is three-dimensional.

• It cannot represent a living cell, since the cytoplasm should be in constant motion.

Scientific knowledge may change as new evidence or information is discovered. Which of the following would NOT be a result of new scientific research and information?

• Binomial nomenclature is assigned to a recently identified plant species.

• An endangered monkey species is put in a reserve for protection from extinction.

• A newly discovered chemical element will be added to the periodic table of the elements.

• A nonnative plant species will begin to reproduce rapidly after being introduced into a swamp ecosystem.

Which statement best summarizes the development of the atomic theory over time?

• The discovery of new evidence resulted in changes to the atomic theory.

• Advancements in atomic models proved the atomic theory was accurate.

• The atomic theory was modified with the discovery of every new element.

• Changes in atomic models showed that the atomic theory was based on opinion.

One physical property of a star is apparent magnitude. Which of the following is used in determining the apparent magnitude of a star?

• the constellation the star is in

• the distance the star is from Earth

• the number of times the star rotates

• the number of prominences the star makes

The surface of Mercury has many more craters than the surface of Earth has. Which of the following statements best explains why Mercury has many more craters than Earth has?

• Mercury rotates faster than Earth does.

• Mercury has a smaller mass than Earth has

• Mercury is much closer to the Sun than Earth is.

• Mercury has a thinner atmosphere than Earth has.

The water level at the beach changes during the day. What causes the different water levels?

• Earth’s revolution

• the Moon’s rotation

• Earth’s magnetic field

• the Moon’s gravitational pull

Deforestation occurs when large areas of trees are cut down. Which of the following impacts on the environment would result from deforestation?

• increased erosion

• colder temperatures

• decreased carbon dioxide

• greater oxygen production

The oldest rock formation identified on Earth is found on the shoreline of Hudson Bay in Canada. This rock formed 4.28 billion years ago. Which information does a scientist need to most accurately determine the age of a rock?

• the percentage of each mineral that makes up the rock

• the thickness of younger rock layers that cover the rock

• the amount of each radioactive element present in the rock

• the amount of weathering present on the surface of the rock

In which layer of Earth are the convection currents that directly result in tectonic plate motion found?

• 1

• 2

• 3

• 4