Electric Charges and Forces-Review

A neutral atom always has

• more neutrons than protons.

• the same number of protons as electrons.

• more protons than electrons.

• the same number of neutrons as protons.

Two unknown neutral substances are rubbed together. During the process the first substance becomes positively charged and the second substance

• acquires a positive charge.

• remains neutral.

• acquires a negative charge.

• could either be positively charged or negatively charged.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

an object can have a

• negative charge

• positive charge

• no charge

• all of the above

Tags

NGSS.MS-PS2-3

The SI unit of electric charge is....

• Coulomb (C)

• Meter (M)

• Kelvin (K)

• Hertz (Hz)

Like charges...., and opposite charges....

• repel, repel

• attract, repel

• repel, attract

• attract, attract

Electric forces depend on?

• wavelengths

• distance

• amplitude

• charge

Tags

NGSS.MS-PS2-3

When different materials are rubbed together, electrons can be

• destroyed and broken down

• transferred from one material to the other

• transformed into a different atomic particle

• combined to form a different element

Tags

NGSS.HS-PS1-2

Negatively charged objects have...... electrons than protons, and positvely charged objects have...... electrons than protons.

• fewer, more

• more, fewer

• the same number of protons and electrons

• don't even have protons and electrons

Tags

NGSS.MS-PS1-1

Choose the particle that has no charge.

• nucleus
• neutron
• proton
• electron

What types of charges attract?

• Positive and Positive
• Positive and Neutral
• Negative and Neutral
• Positive and Negative