Properties and Changes of Materials

What are the different properties of materials? For example: hard or soft, stretchy or not stretchy, rough or smooth, bendy or not bendy, opaque or transparent, waterproof or not waterproof, absorbent or not absorbent, strong or not strong, magnetic or not magnetic, reflective or non-reflective, electrically conductive or electrically non-conductive, thermally conductive or thermally non-conductive, soluble or insoluble.

• Hard or soft, stretchy or not stretchy, rough or smooth, bendy or not bendy, opaque or transparent, waterproof or not waterproof, absorbent or not absorbent, strong or not strong, magnetic or not magnetic, reflective or non-reflective, electrically conductive or electrically non-conductive, thermally conductive or thermally non-conductive, soluble or insoluble.

• Only hard or soft, stretchy or not stretchy, rough or smooth.

• Only opaque or transparent, waterproof or not waterproof, absorbent or not absorbent.

• Only magnetic or not magnetic, reflective or non-reflective.

Solubility is the ability of a substance to:

• dissolve in a solvent

• react with other substances

• change its state

• absorb heat

A mixture is a combination of two or more substances that aren't chemically joined and can be separated into their individual substances. True or False?

• True

• False

What are the two types of mixtures?

• Homogeneous and Heterogeneous

• Solid and Liquid

• Chemical and Physical

• Organic and Inorganic

Solid metals are good thermal conductors because their strong, metallic lattice bonds transfer heat. True or False?

• True

• False

The purpose of a sieve in separating mixtures is to:

• filter out larger particles from smaller ones

• mix different substances together

• dissolve solids in liquids

• evaporate liquids from solids

Filtration is a process used to:

• combine mixtures

• separate mixtures

• create mixtures

• destroy mixtures

Which of the following is an example of an irreversible change?

• Melting

• Freezing

• Burning

• Evaporation

Reversible changes differ from irreversible changes in that they can be ________.

• undone

• permanent

• destructive

• unpredictable

What is a 'filter' used for as described in the glossary?

• To remove unwanted elements from a dataset

• To add noise to a dataset

• To increase the size of a dataset

• To randomly shuffle a dataset