What is the study of the properties of matter and how it changes called?

• Geology

• Biology

• Chemistry

• Physics

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

• Exploding

• Odor

• Rusting

• Burning

What type of change alters the form or appearance of a material but does not make it into another substance?

• Biological change

• Physical change

• Chemical change

• Nuclear change

Which of the following is an example of a chemical change?

• Burning wood

• Molding clay

• Chopping wood

• Melting ice

Who proposed the first atomic theory in 1802?

• Albert Einstein

• Democritus

• John Dalton

• Isaac Newton

What did Democritus call the smallest piece of matter?

• Compound

• Atomos

• Molecule

• Element

What is the central core of an atom called?

• Electron

• Neutron

• Proton

• Nucleus

What charge do protons carry?

• Negative

• Positive

• Neutral

• No charge

What is the atomic number of an element based on?

• Number of neutrons

• Number of electrons

• Number of protons

• Number of molecules

How can gold be separated from other materials in a mixture?

• By its color

• By its smell

• By its density

• By its taste