Pre-review

• What part of the wave is shown by item number 1?

• Trough

• Crest

• Amplitude

• Wave Length

What part of the wave is shown by item number 2?

• Trough

• Crest

• Wave Length

• Amplitude

What part of the wave is shown by item number 3?

• Trough

• Crest

• Wave Length

• Wave Height

What part of the wave is shown by item number 4?

• Trough
• Wave Length

• Wave Height

• Amplitude

What do you call the sub-atomic particle encircled in yellow which holds the positive charge of the atom?

• Electron

• Proton

• Neutron

• Nucleus

What do you call the sub-atomic particle encircled in yellow which carries the positive and neutral charges of the atom?

• Proton

• Electron

• Neutron

• Nucleus