Molecular Structure
Phase change
States of Matter
Chemical and physical changes
How heat affects molecules
100

What is in the nucleus of an atom 

Protons and neutrons 

100

When a liquid changes to a solid what is that change called?

FREEZING 

100

Are molecules tightly packed together in solids? 

Yes they are very tightly packed 

100

Is breaking glass a physical or chemical change?

It is Physical 

100

When molecules are heated do they have more or less energy? 

The molecules have more energy

200

what is the charge for an electron? 

Negative 

200

To get from a gas to a liquid do you add or remove heat?

You remove heat energy

200

How are liquid molecules packed together? 

Loosley packed 

200

What is a chemical change?

When a change occurs that changes the properties of the substance 

200

When molecules get cooled do they expand or contract?  

They contract 

300

Where are electrons located in the structure of the atom?

The outer shell

300

What is sublimation?

When anything solid turns into a gas without first becoming liquid

300

What state of matter has the most energy?

PLASMA 

300

What is a physical change?

When a substance changes appearance or texture but doesn't change the substance 

300

In the summertime when a door gets heated why does it get jammed in the doorway 

When molecules get heated the space in the molecules expands so the door will expand and then it will therefore get stuck.  

400

What does the atomic number stand for on the periodic table of elements?

The number of protons 

400

When does condensation occur?

When a gas changes to a liquid condensation occurs

400

What state of matter takes the shape of its container?

Liquids 

400

Is a leaf changing color a physical or chemical change

Chemical Change  

400

when molecules get cooled do they have more or less energy? 

Less energy

500

How many protons are in oxygen

8

500

When liquid changes to a gas what is it called?

Vaporization

500

What state of matter takes up most of the universe? 

PLASMA

500

When you stir water and lemons is that a physical or chemical change? 

Physical 

500

Are molecules more tightly packed in hot molecules or cold molecules?

In cold water, the molecules are moving a little slower so there more tightly packed