When a plastic comb is rubbed on dry hair, what particles transfer between the materials?

Read the charge model. What is the overall charge of object A?

How will objects A and B interact in this charge model?

The model shows a rubbed balloon beside an uncharged wall. Why can the balloon stick?

Why are balloon-and-hair experiments often less successful during humid weather?

After Bea rubs a balloon on her dry hair, strands spread apart. What explains this?

Carlo feels a tiny shock when touching a doorknob after walking on carpet. What most likely happened?

For a small charged object, how does its effect on a test charge change as the distance between them increases?

What property makes copper useful inside electrical wires?

Predict what happens to lamp L when a dry rubber strip fills the test gap in this circuit.

Which material used in an ordinary pencil can conduct electric current?

Ana places a metal paper clip in a battery circuit's test gap, and the lamp lights. How should she classify the paper clip?

A low-voltage cell powers a classroom lamp. Which connection could make the cell dangerously hot?

Before replacing a material in a classroom test circuit, what should you do with its power supply?

What part supplies electrical energy in a simple classroom circuit?

What component does symbol C represent?

How is the pictured circuit classified?

A working flashlight bulb changes electrical energy into what two forms?

What useful energy change occurs in the motor of a battery-powered toy car?

Two identical lamps work normally. Lamp A runs for 10 minutes and lamp B for 20 minutes. Which uses less electrical energy?

Which core would most strengthen a classroom wire-coil electromagnet if the cores are equally sized and the current stays the same?

What happens to the magnetic effect produced by current in the pictured coil when the battery is disconnected?

With current kept the same, how can Ben strengthen a nail-and-wire electromagnet?

What changes when the battery connections to an electromagnet are reversed?

A crane's electromagnet holds scrap iron above a container. Which action releases the load without moving the crane?

Which field produced by a working nail-and-coil electromagnet can turn a nearby compass needle?

In the landform diagram, what is feature A called?

What kind of landform is Boracay, which has water all around it?

What is the low area between two tall ridges called?

A wide, natural channel carries freshwater downhill toward the sea. What body of water is this?

What is a large inland body of standing water surrounded by land called?

What type of body of water is labeled A in the coastal diagram?

What is a likely immediate effect of a severe wildfire on animals that rely on a wooded slope's trees and shrubs?

What rock property is measured by a scratch test?

A rock sample resists breaking when struck. What property is being tested?

What property describes whether a rock's surface feels smooth or rough?

Granite has interlocking mineral crystals. What rock group does this countertop material belong to?

A shell imprint is preserved in this rock sample. What rock group is it most likely to belong to?

Deep underground, a rock changes under heat and pressure without melting. What rock group results?

In this rock-cycle pathway, what process belongs at stage 4 to return solid rock to its starting material?