Intro To Chemistry

What is a pure substance that cannot be broken down into any other substances by chemical or physical means (Ex. Oxygen)?

• Element

• Compound

• Mixture

• Molecule

What is a pure substance made of 2 or more elements chemically combined in a specific ratio (Ex. Water)?

• Element

• Compound

• Mixture

• Solution

• Atom

This picture represents: 

• Element
• Compound
• Mixture of Elements
• Mixture of Compounds

Tags

NGSS.MS-PS1-1

The temperature at which a SOLID becomes a LIQUID.

• melting point

• freezing point

• viscosity

• solubility

Tags

NGSS.MS-PS1-4

Properties that can be observed directly or measured without changing the chemical identity of the substance.

• chemical properties

• soluable properties

• density properties

• physical properties

Which of the following is an example of a physical property?

• mass

• shape

• luster

• all of these are physical properties

_______ are the smallest structure of living things.

• Atoms

• Molecules

• Cells

• Elements

Tags

NGSS.MS-LS1-1

all matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

Tags

NGSS.MS-PS1-1

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

the central region of an atom where its neutrons and protons are is its 

• nucleus 
• electron cloud
• core 
• center