Activity #3 - Identifying variables

An investigation was done with an electromagnetic system made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured.

Which is the independent variable?

• Type of battery, wire or nail

• Sizes of nails

• Number of paper clips picked up

• The hardware store is closed

• Quality of the battery, wire or nails

An investigation was done with an electromagnetic system made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured.

Which is the dependent variable?

• Type of battery, wire or nail

• Sizes of nails

• Number of paper clips picked up

• The hardware store is closed

• Quality of the battery, wire or nails

An investigation was done with an electromagnetic system made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured.

Which is the control variable?

• Type of battery, wire or nail

• Sizes of nails

• Number of paper clips picked up

• The hardware store is closed

An investigation was done with an electromagnetic system made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured.

Which is the extraneous variable?

• Type of battery, wire or nail

• Sizes of nails

• Number of paper clips picked up

• The hardware store is closed

An investigation was done with an electromagnetic system made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured.

Which is the independent variable?

• Quality of the battery, wire or nails

• Sizes of nails

• Number of paper clips picked up

• The hardware store is closed

You want to measure the temperature of water at different depths in a pond near "La Marquesa" EdoMex. Which is the independent variable?

• Thermometer

• Location of the pond

• Temperature

• Depth of the water

You want to measure the temperature of water at different depths in a pond near "La Marquesa" EdoMex. Which is the dependent variable?

• Thermometer

• Location of the pond

• Temperature

• Depth of the water

You want to measure the temperature of water at different depths in a pond near "La Marquesa" EdoMex. Which is the control variable?

• Thermometer

• Location of the pond

• Temperature

• Depth of the water

You want to measure the temperature of water at different depths in a pond near "La Marquesa" EdoMex. Which is the extraneous variable?

• Thermometer

• Location of the pond

• Temperature

• Depth of the water

• Bad weather

You want to measure the temperature of water at different depths in a pond near "La Marquesa" EdoMex. Which is the moderator variable?

• Thermometer

• Location of the pond

• Temperature

• Depth of the water

• Bad weather