SPEAKING ELPAC Practice

You want to know if the library has a book about horses. What would you say to the librarian?

• Do you have a book about horses?

• Where is the library?

• What is a horse?

• Can I go to the library?

Your class is learning about volcanoes. Your class will be making volcano models. Would it be better to work on the project as part of a group or by yourself? Explain your choice by giving relevant reasons to support your opinion.

It is better to __________ because _____________________.

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Look at the pictures.

Margie and her dad wanted to build a birdhouse. They went out to the garage to gather a pile of boards and some tools.

Where did they go to get the materials?

• A birdhouse

• A treehouse

• A garage

• A car

Look at the pictures.

Margie held the boards while her father hammered the boards together using nails.

What did Margie's dad do?

• hammered the boards together

• held the boards

• played

• looked for birds

After the birdhouse was built, Margie and her father used brushes to paint and decorate it.

What are Margie and her father doing in this picture?

• Margie and her father are cooking.

• Margie and her father are playing.

• Margie and her father are painting their project.

• Margie and her father are gardening.

As soon as they hung the birdhouse in the tree, the birds came to see it.

What happens after they hang the birdhouse in the tree?

• The birds came to see it.

• The tree falls down.

• The birdhouse gets painted.

• Nothing happens.

What is the sequence of events shown in the pictures?

• Margie and her dad get the materials, build the birdhouse, decorate it, then hang it up.

• Margie and her dad build the birdhouse, get the materials, decorate it, then hang it up.

• Margie and her dad hang it up, build the birdhouse, get the materials, then decorate it.

• Margie and her dad , decorate it, hang it up, build the birdhouse, then get the materials,

Have you ever wondered why electric plugs always have metal prongs, but the cords are covered in rubber or plastic? Today we’re going to talk about conductivity, or the way that electricity travels through different materials. Look at picture one. It shows some batteries and a light bulb connected together in a simple circuit with some wires. The wires on one side of the circle are not touching, so the circuit is not complete. I will connect these two wires to different objects to test their conductivity.

When the two wires are connected to a rubber eraser, it makes a circle connecting the batteries and the light bulb. However, in picture two, you can see that the light bulb does not light up when rubber is used to complete the circuit. That’s because rubber is not a good conductor of electricity. The rubber blocks the electricity from completing its circuit.

Finally, the wires are attached to a piece of aluminum foil. Aluminum is a good conductor of electricity, so the electricity from the battery can pass through the foil, to the light, and back to the battery again, making a complete circuit. As you can see in picture three, the bulb lights up.

This demonstration shows how different materials conduct electricity. Metal is a much better conductor of electricity than rubber, which is why electrical plugs have metal prongs. However, the outside of the plug is covered in rubber so that when we touch it, no electricity is conducted to us. Conductivity is an important idea in electrical engineering.

Which is the best summary of the presentation?

• Electricity can pass through metal better than rubber. Batteries and a light bulb are connected together with wires, but the wires are not touching on one side. The wires are connected to a rubber eraser. Rubber is not a good conductor of electricity, so the bulb does not light up. A piece of aluminum foil is connected to the wires, and the bulb lights up because aluminum or metal is a better conductor of electricity than rubber.

• Electricity can pass through metal better than rubber. The wires are connected to a rubber eraser. Rubber is not a good conductor of electricity, so the bulb does not light up. A piece of aluminum foil is connected to the wires, and the bulb lights up because aluminum or metal is a better conductor of electricity than rubber.

• Batteries and a light bulb are connected together with wires, but the wires are not touching on one side. The wires are connected to a rubber eraser. Rubber is not a good conductor of electricity, so the bulb does not light up.

• Electricity happens when a battery gets plugged into a lightbulb.

What happens when the wires are connected to a rubber eraser in the conductivity experiment?

• The eraser conducts electricity.

• The eraser does not conduct electricity.

• The eraser melts.

• The eraser changes color.

The bulb lights up when a piece of aluminum foil is connected to the wires in the conductivity experiment because:

• aluminum foil is a good conductor of electricity.

• aluminum foil is a good insulator.

• aluminum foil generates electricity.

• aluminum foil blocks the current.