6th Grade Science Mastery Pt. 2

George and his classmates are investigating the major systems of the body and how they interact with each other to maintain homeostasis. Which of these statements best describes the interaction between the respiratory system and the circulatory system?

The Dead Sea is an extreme environment in the Middle East that contains high levels of salt. Not many organisms live in these conditions, so scientists were surprised to discover a single-celled organism that was living off the nutrients in the water. How would scientists classify this organism?

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Scientists group living things by similar characteristics. What is the largest group that living things can be classified?

• class

• domain

• kingdom

• order

Enrico finds a slide of a specimen that is not label. He views the slide underneath the microscope and observes the sample is a multicellular, eukaryotic, photosynthetic organism. Which of the following Kingdoms should this organism be classified into?

What are the two parts of a scientific name?

In 1912, German geologist Alfred Wegener developed the Theory of Continental Drift which explains the formation and movement of the continents. In the 1960's, Harry Hess proposed the Theory of Sea-floor Spreading which explains the creation of new sections of ocean floor. Today, a new theory called Plate Tectonics incorporates both ideas of continental movement and ocean floor formation. Why was it necessary to change the older theories?

• Scientific theories are modified as new evidence is discovered.

• Scientific theories are discarded as new evidence is discovered

• Scientific theories are rejected and replaced by new theories.

• Scientific theories are widely accepted when they have little evidence.

Tags

NGSS.HS-ESS1-5

During the nineteenth century, biologists knew that South America and Africa contained similar fossils. These fossils let them to believe that a temporary land bridge between South America and Africa allowed ancient species to move between both continents. In the twentieth century, evidence showed that South America and Africa were once part of the same larger continent and that there were no land bridges between them. How should biologists respond to the new geological finding?

• Biologists should reject the geological finding, because it is new.

• Biologists should update the history of life, because it should include the new geological finding.

• Biologists should ask physicists what to do, because physics is a more exact science.

• Biologists should reject the belief in ancient species, because there were no land bridges.

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

NGSS.MS-LS4-2

A group of people rented a fishing boat for the day and traveled far from land. Later they discovered they needed a compass to find their way back. Which of the following describes the force acting on the compass to guide them safely back to land?

Johann and Tina are at the Museum of Science and History and decide to go to the Planetarium and watch the show Earth, Moon and Sun. While waiting to go into the Planetarium, they discuss the effect that gravitational force has on the weight of a person on the moon.  What can they conclude about their weight when on the moon?

• It increases because gravitational force is increasing.

• It increases because gravitational force is decreasing.

• It decreases because gravitational force is increasing.

• It decreases because gravitational force is decreasing.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

The diagram shows the size of Earth compared to the size of Mars.

Mars only has about 11% of Earth’s mass. What can you conclude about the gravity of these two planets?

• Earth has less gravity because it has more atmosphere.

• Earth has more gravity because it has more mass.

• Mars has more gravity because it has less mass.

• Mars has less gravity because it has more atmosphere.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4