Gravitational and Electrical Charge Concepts

A gas giant is a type of planet. Four gas giants orbit the sun. The table shows the average distance of each of these planets from the sun. At which planet is the sun's gravitational field the strongest?

• Jupiter

• Neptune

• Saturn

• Uranus

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

NGSS.MS-ESS1-3

Student 1 claims that gravitational fields do not exist between objects unless they are in direct contact. Student 2 does not agree with Student 1. Which statement should Student 2 use as evidence that Student 1 is incorrect?

• A person weighs more on the moon than on Earth

• Two books at rest on a table do not slide toward each other

• On Earth, an object that is thrown upward falls back down to the ground

• If two objects are dropped from the same height, the heavier one falls faster

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

A student rubs a balloon with a wool cloth several times, giving the balloon a negative charge. Which process is the student using to charge the balloon?

• Charging by friction

• Charging by induction

• Charging by insulation

• Charging by conduction

A student rubs a balloon with a wool cloth several times, giving the balloon a negative charge. The student uses the same process to charge a second balloon. What will MOST LIKELY happen if the two balloons are brought close together?

• The balloon will repel each other

• The balloons will attract each other

• Both balloons will become positively charged

• The negatively charged particles will all move to one balloon

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

A student picks up a balloon and a wool cloth, each of which has no electrical charge. He rubs the balloon with the cloth, causing the balloon to gain a negative electrical charge. Which of these BEST explains why the balloon gains a negative charge?

• The balloon loses protons

• The balloon loses electrons

• The balloon gains neutrons

• The balloon gains electrons

A student picks up a balloon and a wool cloth, each of which has no electrical charge. He rubs the balloon with the cloth, causing the balloon to gain a negative electrical charge. Select TWO statements that correctly describe a change that occurs in the wool cloth when it is used to rub the balloon.

• The wool cloth loses protons

• The wool cloth loses neutrons

• The wool cloth loses electrons

• The wool cloth becomes negatively charged

• The wool cloth becomes positively charged

Four objects are dropped from the same height. The table lists properties of the four objects. Which object experiences the MOST gravitational force?

• Golf ball

• Basketball

• Bowling ball

• Table tennis ball

Tags

NGSS.MS-PS2-4

In an investigation, a student rubs a plastic rod with a wool cloth. He then holds the rod 8 centimeters above a pile of paper. He count the number of paper pieces picked up by the rod. Next, the student repeats the procedure, holding the rod 4 centimeters above the paper pieces. Which of these will MOST LIKELY occur when the rod is held closer to the pieces of paper.

• The rod will repel the pieces of paper

• The rod will not pick up any pieces of paper

• The paper pieces will experience a weaker electric force

• The paper pieces will experience a stronger electric force

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

Objects on Earth are pulled by Earth's gravity more strongly than by the sun's gravity. Which of the following BEST explains this difference in gravitational force?

• Objects on Earth are much closer to Earth than to the sun

• Objects on Earth are touching Earth, but they are not touching the sun

• The sun has more mass than Earth, so it pulls with less force than Earth does

• The sun loses energy in the form of light and heat, so it pulls with less force than Earth

Tags

NGSS.MS-PS2-4