Science 5 v2

Below are advantages of the parallel circuit, EXCEPT ONE. Which one is it?

• Two or more pathways allow electric current to pass through.     

• When a bulb burns out, other bulbs continue to glow.      

• Parallel circuit requires many wiring connections.

• Individual devices can be controlled.

Leejay made an electromagnetic. He wants to add a core to the coil of wire to make the electromagnet stronger. Which materials should he use for the core?

• Aluminum

• Iron

• Plastic

• Wood

Why do we need a measuring device to measure length or distance?

• To experience using tools like ruler, meter stick, etc.

• To be familiar with the use of each tools

• To show off your newly purchased ruler

• To have an accurate data

A simple circuit is made with long coiled wire, 1.5 volts battery and a bulb. When turned on, the light gets dimmer. Why?

• because the wire is too short     

• because the wire is too long

• because the load is too many

• because the battery is too small

In a three-bulb parallel circuit, when you removed the third bulb from it, what will happen to the other bulb left?

• All the bulbs will never light up.          

• The two remaining bulbs will still light up.

• It gives effect of transferring electricity to the two bulbs left.

• No electric charge will pass through to the two remaining lights bulb.

What will happen if you add more coil of wire to the electromagnet?

• The electromagnet will stay the same.

• The electromagnet becomes stronger.

• The electromagnet becomes heavier.

• The electromagnet becomes weak.

What do you need to do on this circuit so that the lamp lights up?

• Close the switch.

• Add another wire

• Add another bulb or lamp

• Close the bulb

What happens when a part of an electromagnet is disconnected?

• It loses its magnetism

• Electricity continues to flow through it

• The electromagnet becomes a permanent magnet

• There is an increase in the number of materials attracted

One afternoon your Science class had just finished the experiment on electromagnets. Then, your classmate accidentally bumped the table with instructional materials causing the box of thumbtacks to spill its contents in the sandbox. How are you going to gather all the thumbtacks using what you learned from the lesson?

• Use an electromagnet to gather the thumbtacks

• Ask everyone to help gather the thumbtacks

• Pick the thumbtacks one by one

• Construct an electromagnet

What happens when light strikes a transparent surface, such as window glass or plastic wrap?

• The light will bend

• The light will bounce back

• The light will be absorbed and heated

• The light can pass through or be transmitted