Minty- smelling products can have one of these ingredients: ______________, camphor, or eucalyptus.

One scientist, for example, has learned that the smell of peppermint can help athletes perform better. People work out differently when they smell _______________. They work out longer and harder.

Green apple odor can help with migraine _______________.

Some people smell lavender to make them feel more ___________________.

Many people burn scented candles or use ________ fresheners to put an odor they like into the air.

You have probably smelled menthol when brushing your teeth or chewing gum. ________________ is used in soaps, toothpaste, chewing gum, and cough drops.

Remember that humans can smell about 10,000 different odors.

When you hold a tiny bit of menthol, you are holding _____________ of menthol molecules.

When smelling too many intense smells, it can become difficult to tell the difference between

odors.

What properties of substances do we know now?

Why do different substances have different properties?

What kind of representations have we used to represent molecules?

Different elements are made up of different atoms.

Different combinations of atoms make up molecules.

Molecules of a substance have a specific combination of atoms.

The main limitation of modeling molecules is that although we draw or create a few molecules of substance, a substance is actually made up of an extremely large number of ____________________.

Substances are made from different types of atoms, which combine with one another in various ways. Atoms form _________ that range in size from two to thousands of

atoms.

Each pure substance has characteristic physical and chemical ________________ that can be used to identify it.

Different arrangements of atoms (even if 2 substances have the same kind of atoms) result in different properties— like different ____________.

What is a Solid?

Something that takes up space and has mass.

What is Liquid?

All odors move by

Odors have this in common:

The best definition of mass is...

At room temperature, which of these is a solid?

What is an odor?

How do odors move?

In science, models are helpful in many ways. In general, scientists develop models and use them to explain _______________.

Wherever you are— in a classroom, outside,on a bus, at home— you can smell ____________ because they become part of the air.

Different elements are made up of different atoms.

Different combinations of atoms make up molecules.

Molecules of a substance have a specific combination of atoms.

The main limitation of modeling molecules is that although we draw or create a few molecules of substance, a substance is actually made up of an extremely large number of _______________________.

The menthol you smelled in class can be found in the peppermint plant.

In Class we smelled several unknown materials, guessed what they were, and then examined _______________ of the

molecules that make up each one.