Interactions of Matter

Which of the following involves a change in chemical properties?

• Boiling water to make steam

• mixing vinegar and baking soda to make bubbles of CO₂

• melting a bar of solid gold to make liquid gold

• tearing a piece of paper into smaller pieces

If you are given 2 unknown samples of gray metals, how can you use physical properties to determine if they are the same?

• you can use their masses

• compare their densities

• compare their ability to react with acid

• you can identify the elements that they are made of

How are solids different from liquids?

• Solids have a definite mass, liquids do not

• Solids have a definite shape but liquids do not

• Solids have a lower density than liquids do.

• Solids have a greater volume than liquids do.

A student has sand, water, and chalk. Which 2 could the students combine to make a mixture?

• Only water and chalk can form a mixture.

• Only water and sand can form a mixture.

• Only chalk and sand can form a mixture.

• Any 2 of the 3 together can form a mixture.

Which of the following is classified as a compound?

• Pb₂

• CO₂

• Na

• H₂

Which of the following is NOT a physical property of matter?

• color

• density

• acidity

• solubility

Which of the following is a chemical property of matter?

• weight

• combustibility

• odor

• electrical conductivity

A piece of chalk becomes shorter as it is used. Which is not true of the shorter piece of chalk?

• its mass has changed

• its shape has changed

• its physical properties have changed

• its chemical properties have changed

How are elements and compounds related?

• Compounds make up elements. An element and its compounds have different properties.

• Elements make up compounds. A compound and its elements have different properties.

• Compounds make up elements. An element and its compounds have the same properties.

• Elements make up compounds. A compound and its elements have the same properties.

A student claims that a rock, a class of juice, and air are made of atoms. Is this student correct?

• No, only the rock and glass of juice ore made of atoms. The air is not because it is a gas.

• No, only the rock is make of atoms. The glass of juice and air are not made of atoms because they are not solids.

• Yes, they are all made of the same type of atom.

• Yes, they are all made of different types of atoms.