Changes in Matter Quiz Review

A powder is mixed with water and dissolves. No temperature change is observed. This must be a __________ change.

• Chemical

• Physical

This is a _____________ change.

• Chemical

• Physical

This is a __________ change.

• Physical

• Metaphysical

• Chemical

• Logical

This is a _________ change.

• Magical

• Chemical

• Physical

• Seussical

If reaction starts with 20g of reactants it should produce... 

• a total of 40g of product
• a total of 10g of product
• a total of 80 g of product
• a total of 20g of product

Why does this picture demonstrate the Law of Conservation of Mass?

• the number of atoms of each element are the same on both sides

• they start out separate and end up combined

• the same elements are used

• it doesn't demonstrate the Law of Conservation of Mass

How many oxygen atoms are in this chemical formula?

• 6 oxygen atoms

• 2 oxygen atoms

• 3 oxygen atoms

• 4 oxygen atoms

What is a molecule?

• Two or more atoms bonded together
• One element
• One atom
• Solid, Liquid, Gas

Water (H₂O)

• Element

• Compound

• Mixture

Is burning wood a chemical or physical change?

• chemical
• physical