3.5 How Can Substances Be Identified?

The four different properties you can easily see are

• conductivity, reflectivity, hardness, and solubility.

• brittleness, hardness, conductivity, and color.

• hardness, color, brittleness, and reflectivity.

• color, reflectivity, solubility, and brittleness.

How can you test the hardness of a material?

• bend it with your hands

• scratch it with a diamond

• flatten it with a hammer

• dissolve it in a substance

A substance’s _____________ is whether it can be shaped or not.

• hardness

• conductivity

• brittleness

• reflectivity

__________ materials tend to be more reflective than other materials.

• Pale and metal

• Dark and metal

• Pale and plastic

• Dark and plastic

Tags

NGSS.MS-PS4-2

Solubility depends on

• the substance being dissolved and not the substance it is dissolved in.

• not the substance being dissolved but the substance it is dissolved in.

• the substance being dissolved and the substance it is dissolved in.

• not the substance being dissolved and not the substance it is dissolved in.

Plastic usually covers power cords because

• plastic has a low relative conductivity.

• plastic has a low electrical conductivity.

• plastic has a high thermal conductivity.

• plastic has a high electrical conductivity.

Tags

NGSS.MS-ETS1-1

Which of the following has a high thermal conductivity?

• glass

• plastic

• metal

• all of these

We know that a substance is ________ when it burns, bubbles or rusts.

• soluble

• conductive

• brittle

• changing

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If a material rusts, it contains

• vinegar.

• iron.

• ash.

• wood.

Tags

NGSS.MS-PS1-5

Which of the following properties does chalk have?

• conductive

• very brittle

• not reflective

• all of these

Answer explanation

Most of the chalk you can find today was made more than 65 million years ago.