Year 7 Science · Unit 3 · Lesson 15

Magnetic Fields and Electromagnets

Foundation Worksheet

Name

Date

Class

Learning Goals

Define a magnetic field and state the rules for field lines.
Identify the parts of a simple electromagnet.
Recall how to map a field and how to make an electromagnet stronger.

Warm Up

Match each word to its meaning

Draw a line connecting each word on the left to its correct meaning on the right. Or write the matching letter next to each word.

Word	Your answer	Meaning
Magnetic field		A. A coil of wire that produces a magnetic field when current flows through it
Field line		B. A piece of iron, such as a nail, that makes an electromagnet much stronger
Solenoid		C. The region around a magnet where its force acts on magnetic materials or other magnets
Electromagnet		D. A line we draw to show the shape and direction of a magnetic field
Iron core		E. A temporary magnet made by passing current through a coil of wire

Your Turn

Fill the gap

Choose the correct word from the word bank to complete each sentence. Two words will not be used.

field north south iron current filings heavier colour

A magnetic is the region around a magnet where its force acts. Outside a magnet, field lines point from the pole to the pole. You can map a magnetic field by sprinkling iron on paper over a magnet. An electromagnet is made by passing an electric through a coil of wire. Adding an core inside the coil makes the electromagnet much stronger.

Show What You Know

1. A student says: "Magnetic field lines can cross each other when the field is strong." Is the student correct? Explain your answer.

Recall 2 marks

2. Name the three things you need to build a simple electromagnet, and write one safety rule you must follow.

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?