8.p.1.3 EOG Style

Two identical containers each hold one liter of water. One container is kept at room temperature as a liquid. The other container is placed in a freezer and kept as a solid. Which property is MOST likely to be the same in both states of matter?

• density

• mass

• shape

• volume

Using a closed system, a student heats 100 milliliters (mL) of distilled water in a flask. The steam from the water is captured, cooled, and condensed as shown in the diagram. How much water is MOST likely collected?

• 1mL

• 10mL

• 100mL

• 110mL

A student wrapped a wire around an iron nail and connected the wire to a battery. The nail became magnetized, as shown in Diagram 1. When the battery was disconnected, the nail was no longer magnetized, as shown in Diagram 2. Which statement BEST describes what occurred during this investigation?

• A new property was acquired when the nail became magnetized and caused a chemical change in the nail.

• When the nail became magnetized the iron atoms in the nail were temporarily aligned and caused a physical change.

• The electric current passing through the wires heated the nail and caused the nail to undergo a chemical change.

• The electric current passing through nail temporarily changed the iron atoms into another substance and caused a physical change.

The drawing shows solid carbon dioxide changing into carbon dioxide gas. Which statement describes the relationship between the solid carbon dioxide and the carbon dioxide gas after all of the solid has changed to gas?

• They have the same volume

• The gas has less volume than the solid

• The gas has less mass than the solid

• They have the same mass

A group of students observed the formation of bubbles when water boiled. What happened to matter because of the physical change to the water?

• New matter was created in the bubbles.

• Old matter was destroyed as the water turned to gas.

• Matter was conserved when it changed form.

• The composition of the matter changed.

This general chemical equation shows an example of energy availability in a theoretical reaction. Which statement is true about the equation?

• Energy was released.

• The equation is missing reactants.

• Energy was absorbed.

• The equation is missing products.

During photosynthesis, carbon dioxide and water combine according to the general equation:

Why is photosynthesis a chemical reaction?

• because new substances are formed

• because an input of energy is required

• because the reactants are compounds

• because the products include an element

A student kept a notebook during an investigation. Which recorded observation was MOST likely a physical change?

• frying an egg

• baking a cake

• toasting bread

• melting butter

John and Lisa collected a sample of ocean water and placed it in a jar. Within a couple of days, the water had evaporated and salt was visible at the bottom of the jar. This is an example of a

• physical change

• chemical change

• solute being dissolved

• a new substance being fromed

A chemist observed bubbling and fizzing after adding an acid solution to a white powdery substance in a beaker. Which of the following can be inferred?

• the acid and powder formed a new product.

• The acid boiled when poured into the beaker.

• A physical reaction produced a gas mixture.

• A reaction occurred that produced heat.