9/17 Checkpoint Review Part I

Front

Example of a chemical change

Back

Combining baking soda and vinegar

Answer explanation

Combining baking soda and vinegar is a chemical change because it produces new substances (carbon dioxide gas) through a chemical reaction, unlike the other options which are physical changes.

Tags

8.5D

Front

Indicator of chemical change: exception?

Back

Change in state of matter

Answer explanation

A change in state of matter (solid, liquid, gas) can occur without a chemical change, such as melting or boiling. In contrast, formation of gas, temperature change, and precipitate formation are clear indicators of a chemical change.

Tags

8.5D

Front

Metals are shiny and reflective

Back

Luster

Answer explanation

The term 'luster' describes the shiny and reflective quality of metals. It refers to how light interacts with the surface of a material, making it appear shiny, which is a key characteristic of metals.

Front

Metals can be formed into shapes

Back

Malleable

Answer explanation

Metals are malleable, meaning they can be easily shaped or formed into different shapes without breaking. This property distinguishes them from other materials, making 'malleable' the correct choice.

Front

Metals can be pulled into wires

Back

Ductile

Answer explanation

The ability of metals to be pulled into wires is known as ductility. Ductile materials can be stretched without breaking, making 'ductile' the correct choice, while 'malleable' refers to being shaped or hammered.

Front

Location of metals in the periodic table

Back

Left side and center

Front

Substance likely to be magnetic?

Back

Metal

Answer explanation

Magnetic substances are typically metals, as they have unpaired electrons that allow them to respond to magnetic fields. Non-metals generally do not exhibit magnetic properties, making 'metal' the correct choice.

Front

Zoe mixes flour, sugar, and eggs

Back

chemical change

Answer explanation

A chemical change involves a transformation that alters the substance's chemical structure, resulting in new substances. If the picture depicts such a transformation, it is correctly labeled as a chemical change.

Front

Observation of wood turning to ash and smoke

Back

Chemical change

Answer explanation

A chemical change involves a transformation that alters the substance's chemical structure, resulting in new substances. If the picture depicts such a transformation, it is correctly labeled as a chemical change.

Front

Mixtures

Back

Can be separated using physical properties

Tags

8.P.1.1