Who got it right?

• An iron nail is more dense and magnetic.

• A plastic spoon is less dense and a conductor.

• A penny is soluble and non-magnetic.

• A wooden block is a solid and soluble.

Answer explanation

All metals are more dense or sink in water.

What are the electrical insulators? Check them all.

• wood

• plastic

• metal

• glass

Answer explanation

Glass is an electrical insulator but it is a heat conductor!

What matter is more dense and soluble in water?

• sand

• oil

• sugar

• not here

Answer explanation

Oil and sand do not dissolve in water.

What are the heat insulators? Check them all.

• cloth

• rubber

• glass

• wood

Answer explanation

Glass is a heat conductor, but it is an electrical insulator!

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What is a conductor and non-magnetic?

• Iron nail

• copper penny

• steel washer

• metal paperclip

Answer explanation

All metals are conductors, but not all metals are magnetic, only iron, steel, nickel and cobalt.

Who got it wrong?

• A rubber eraser is an insulator and not soluble.

• A wooden stick is less dense and does not conduct heat.

• An iron nail is non-magnetic and more dense.

• Salt is more dense and soluble.

Answer explanation

Iron sticks to a magnet, so it is magnetic.

What is magnetic? Check them all.

• brass key

• steel washer

• iron nail

• aluminum foil

Answer explanation

Not all metals are magnetic! Only iron, steel, nickel and cobalt.

Tags

NGSS.MS-PS2-3

What are the heat conductors? Check them all.

• water

• wood

• glass

• metal

Answer explanation

Water and metal conduct heat and electricity; glass conducts heat but insulates electricity!

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What matter is soluble in water? Check them all.

• sand

• honey

• sugar

• salt

Answer explanation

Honey, sugar and salt dissolve in water.

Who got it wrong?

• A conductor moves heat.

• Soluble means dissolve.

• All metals are magnetic.

• Plastic is a good insulator.

Answer explanation

Some metals are non-magnetic, such as brass, copper and aluminum.