What are two ways to increase the strength of an electromagnet? Add more turns of the wire to the solenoid.
Increase the amount of current that passes through the wire.
Decrease the amount of current that passes through the wire.
Decrease the turns of the wire to the solenoid.

there is 3 :)

Explanation:

You can make an electromagnet stronger by doing these things:

1. wrapping the coil around a piece of iron (such as an iron nail)

2. adding more turns to the coil.

3. increasing the current flowing through the coil.

Two ways to increase the strength of an electromagnet is

Add more turns of the wire to the solenoid.

and

Increase the amount of current that passes through the wire.

Explanation: Factors that affect the strength of electromagnets are the nature of the core material.

d. temperate deciduous forest

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).