Science final review 6th grade

Which of the following elements are metalloids?

• Only Boron and Silicon

• Only Lead and Aluminum

• Only Carbon

• None of the above

Which statement correctly describes the forces?

• The net force is acting in an upward direction.

• The net force is acting to the left.

• The net force is moving to the right.

• The net force is zero and all the forces are balanced.

Which situation describes an object with an average speed of 50 km/h?

• A dog runs a distance of 10 km in a time of 1 hour then rest for 30 minutes. He then returns to his starting point in 1 hour.

• A person traveled by train for 1 hour at a speed of 50 km/h. He then traveled by a taxi for 30 minutes at a speed of 32 km/h to complete his journey.

• A car starts from point A, goes 50 km/h to point B, immediately turns around, and returns to point A. The round trip takes 2 hours.

• A grocery truck travels 200 miles from Chicago to Minneapolis in 4 hours round trip.

What was the cars average speed?

• 0 m/s

• 14 m/s

• 28 m/s

• 30 m/s

Which of the following statements is true about non-metals?

• Nonmetals are good conductors, malleable, and have shiny luster.

• Nonmetals are good insulators, are brittle and have dull luster.

• Nonmetals are semi-conductors and have properties of metals and metalloids.

• All of the above.

What is the difference in the average speed between the two marbles?

• 1 m/s

• 0.5 m/s

• 1.25 m/s

• 0 m/s

A biologist researching the behavior of rats in a maze is monitoring the speed of one particular rat. He observes that the rat moves slowly through the maze, stops for a few seconds to drink water, and runs quickly to the end of the maze. Which graph matches the rats motion?

• A

• B

• C

• D

• F

• G

• H

• J

The three domains are Bacteria, Archaea, and Eukaraya, represent very different forms of life. Domain Bacteria is made up of prokaryotes. Domain Eukarya is made up of all eukaryotes. Which of the following statements correctly describes forms of life found in Domain Eukarya?

• The organisms are single or multicellular and most have complex cell structure.

• These one celled organisms live in harsh environments, such as the deep ocean and hot springs.

• The organisms have a cell wall, reproduces by cell division, and live in the human body.

• These unicellular organisms lack a nucleus in their cells and are found in almost any environment.

Eukaryotic and prokaryotic cells have some parts that are different. Which of the following would you find only in eukaryotic cells?

• Membrane bound organelles and a nucleus.

• A nucleus and organelles without membranes.

• A cell membrane and organelles without membranes.

• Membrane bound organelles and DNA in cytoplasm.