Anthony's dad wired new lights for his bedroom. When he thought everything was connected correctly, he turned on the switch and nothing happened. Is the problem from a closed or an open circuit?

What form of energy is cause by moving electrons?

If you set a piece of paper on fire, what kind of change takes place?

A mixture is made by combining sand and iron filings. What could you use to separate the iron filings from the sand? 

Two clear substances are combined inside a plastic bag. The plastic bag is tightly sealed. The substances in the bag becomes warm. Is this a physical change or a chemical change?

While eating an apple Justin noted that a chemical change was about to take place. Where in the digestion process do chemical changes happen?

How many wires would be needed to make this a closed circuit?

What part of an atom always has a negative charge?

The diagram shows an electrical circuit. What object could be placed in the open space between the wires to complete the circuit? (nail, toothpick, eraser, pencil)

Maggie is making pancakes. How do the pancakes change as they are cooked? Is this a physical change or a chemical change?

Sylvia placed baking soda and vinegar in the bottom of 4 water bottles. It started fizzing and the balloon began to increase in size. What kind of change is happening in the photo?

Where is the magnetic field the strongest on a magnet?