Light
What happens when light hits a mirror?
It reflects
Name one EM Wave
Radio, microwave, infrared, visible, UV, X-ray, gamma ray
What charge does a balloon get when rubbed on hair?
Negative
What is the unit of current?
Ampere (A)
Name one magnetic material
Iron, nickle, cobalt, steel
Why do shadows form?
Because light travels in straight lines and objects block it
Which EM is used for cooking food in microwave?
Microwaves
Why do small pieces of paper jump to a charged balloon?
Negative
What is needed for current to flow?
A complete closed circuit
Which direction do magnetic field lines go?
North - > South
What is reflection?
When light bounces off a surface
Which EM wave has the highest frequency?
Gamma rays
Why does a balloon stick to a wall?
What happens to brightness when a second bulb is added in series?
Both bulbs become dimmer
Why does a compass needle point north?
It aligns with Earth's magnetic field
Draw a ray diagram showing reflection
Your drawing should include: Incident ray, normal line, reflected rat, angle of incidence = angle of reflection
Which EM has he longest wavelength?
Radio Waves
Why do clothes sometimes crackle in the dryer?
Clothes rub and gain charge; the discharge causes crackling
Why does a broken bulb stop a series circuit from working?
Because the circuit is broken and current can't flow
The magnet attracts it
Explain how we see objects that do not give off light
We see them because they reflect light from another source into our eyes
Describe one real-life use of UV light
Tanning, sterilizing medical equipment, detecting fake bank notes
Explain how lightning is caused by static electricity
Charge builds up in clouds; a huge discharge happens between cloud and ground
Draw and label a simple working circuit
Must include a battery, wires, bulb, and closed loop
Describe how to make an electromagnet stronger
Add more coils or use a stronger battery