Grade 6 Quarter 4 PMA 7 Review

The graph below shows the relationship between the revolution period of a planet and its distance from the Sun. Based on this graph, how would you describe the relationship between the revolution period of a planet and its distance from the Sun?

• The shorter the distance of a planet from the Sun, the longer its revolution period.

• The greater the distance of a planet from the Sun, the longer its revolution period.

• The revolution period of a planet changes randomly as the planet moves away from the Sun.

• The revolution period of a planet does not change as the planet moves further from the Sun.

Tags

NGSS.MS-ESS1-2

NGSS.MS-ESS1-3

Scientists voted to change the definition of a planet. Headlines read “Pluto is not a planet.” What was the article probably about?

• Pluto shrank in size. 

• Pluto no longer met the criteria to be a planet.

• Space exploration revealed that Pluto was smaller than Earth.

• Scientists needed more dwarf planets for the solar system model.

The law of universal gravitation states that both the mass and the distance of objects affect the gravitational force between them. The gravitational force increases as the mass of the objects increases. The gravitational force decreases as the distance between the objects increases. Why are these statements considered a scientific law and not a scientific theory?

• The statements say what happens, not why it happens.  

   

• This statement involves measurements of mass and distance.

• This statement explains the attractive force between two objects.

• This statement predicts what will happen under certain conditions.

Tags

NGSS.HS-PS2-4

A student makes a simple model of the solar system using a basketball to represent the sun. Then he places a series of ping pong balls in a line to represent each of the planets. The ping pong balls are evenly spaced one foot apart. He wants to use the model to compare how long it would take for a spacecraft to travel between different planets. How should the model be changed to help him decide?

• He should paint the balls so that each one looks more like the planet it represents. 

• He should add a spacecraft to the model to represent the ship traveling to the planets.

• He should use balls of different sizes to represent the planets so that the relative sizes of the planets are represented.

• He should distribute the balls differently so that the relative distances between the planets are better represented.

Tags

NGSS.MS-ESS1-3

NGSS.MS-ETS1-2

Which statement best describes the use of replication to verify the results of a scientific discovery?

•     A scientist repeats the same experiment several times and compares the results obtained.​

•    A scientist conducts several different experiments and compares the results obtained.​

• Several scientists observe a scientist conducting experiments and compare their notes on the results obtained.​

• Several scientists independently perform the same experiment and compare their results with the original experiment's results.

Tags

NGSS.MS-PS1-2

Jorge was studying the Universal Law of Gravitation and created an experiment to test the relationship between mass and distance. He set up two identical magnets and placed them at the distances in the table.

 Jorge measured the magnetic force with a spring scale and recorded his results. What is the independent (test) variable in Jorge's experiment?

•    Total number of magnets   

• Distance in centimeters (cm)

• Magnetic force in Newtons (N)

• Using different types of spring scales

Tags

NGSS.MS-PS2-3

Gravity is a force of attraction between two or more masses. The gravitational attraction between the Sun and each of the planets is responsible for which of the following?

• The amount of sunlight that reaches the planets.  

   

• The number of planets that can orbit the Sun.

• The orbital movements of the planets around the Sun.

• The presence or absence of water on the planets near the Sun.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which of the following options best describes the formation of the solar system?

• The sun expelled rocky material that later formed the planets.

• A rotating disk of gas and dust was attracted by the force of gravity.

• A very large planetary body randomly broke into several smaller planets.

• Several stars of different masses cooled and randomly formed the planets and the sun.

Tags

NGSS.MS-ESS1-2

Gravity is a force that explains the observations scientists have made about space. Which of the following observations about space is NOT explained by gravity?

•    The formation of stars and planets.

• The amount of light emitted by a star.

• The number of moons orbiting a planet.

• The orbital speed of planets around the Sun.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which of the following is the best explanation of the relationship between mass and surface gravity?

• There is an inverse relationship between mass and surface gravity. The more massive the object, the lower the surface gravity.

• There is an inverse relationship between mass and surface gravity. The less massive the object, the greater the surface gravity.

• There is a direct relationship between mass and surface gravity. The more massive the object, the greater the surface gravity.

• There is a direct relationship between mass and surface gravity. The less massive the object, the greater the surface gravity.

Tags

NGSS.MS-PS2-4