Matter and Changes

Matter and Changes

Multiple Select

Which of the following are pure substances?

• Carbon dioxide (CO₂)

• Milk

• Salt water

• Nitrogen (N₂)

Multiple Select

Which of the following is an element?

• Lead metal

• Iron rust

• Aluminum foil

• Silver sulfate

Multiple Select

Which of the following are compounds?

• Silver nitrate (AgNO₃)

• Bronze (Cu + Sn)

• Sugar (C₁₂H₂₂O₁₁₎

• Blood

Multiple Select

Which of the following are mixtures?

• Sodium bicarbonate (NaHCO₃)

• Steel (Fe + C)

• Salt water (NaCl + H₂O)

• Gold (Au)

Multiple Choice

What type of mixture is chocolate chip ice cream?

• Homogeneous

• Heterogeneous

Multiple Choice

What type of mixture is air (with smog) ?

• Homogeneous

• Heterogeneous

Multiple Select

Which of the following are physical changes?

• Cutting your hair

• Fruit rotting

• Water boiling

• Dropping an alka-seltzer in water

Multiple Select

Which of the following are examples of chemical changes?

• Burning paper

• Cutting paper

• Iron rusting

• Wrinkling paper

Multiple Select

Which of the following are examples of chemical properties?

• Conductivity

• Flammability

• Reactivity

• Malleability

Multiple Select

Which of the following are evidences of a physical change?

• Change of size

• Change of color (unintended)

• Change of state of matter

• Change of odor (Unintended)

Multiple Choice

What is the main evidence that a chemical change has occured?

• Change of color

• Production of Bubbles

• Production of Fire

• A new substance is produced