Energy & Matter: Structure and Properties - REVIEW

What is a substance in the context of matter?

• A mixture of different elements.

• A combination of molecules.

• Matter with a specific makeup and specific properties.

• A type of molecule.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Why is peanut butter not considered a pure substance?

• Because it is made up of only one type of molecule.

• Because it cannot be broken down into simpler substances.

• Because it is made up of many substances that could theoretically be broken down into component parts.

• Because it is a single chemical compound.

What is an element?

• A compound made of two or more different elements.

• A molecule consisting of atoms bonded together.

• A primary form of matter that cannot be broken down into something else.

• A type of mixture.

How many naturally-occurring elements are there?

• 24

• 94

• 100

• 118

What is a compound?

• A single element in its pure form.

• A mixture of two or more substances.

• A molecule made up of atoms from the same element.

• A chemical substance composed of two or more different elements.

What is the most well-known compound mentioned in the text?

• Oxygen

• Carbon Dioxide

• Water (H2O)

• Hydrogen

What is a molecule?

• A single atom.

• A group of atoms bonded together.

• A primary form of matter.

• A type of element.

Tags

NGSS.MS-PS1-1

Why is peanut butter not considered a compound like water?

• Peanut butter can be broken down into its component parts.

• Peanut butter is only mixed physically, not chemically.

• Peanut butter is a homogeneous mixture.

• Peanut butter is made up of hydrogen and oxygen.

What is the main difference between mixtures and compounds?

• Mixtures are the result of chemical combinations, and compounds are the result of physical combinations.

• Mixtures can be separated into their components by physical means, while compounds require chemical reactions.

What is a homogeneous mixture?

• A mixture that has different properties throughout.

• A mixture that cannot be separated into its components.

• A mixture that has the same properties throughout.

• A mixture that has a variable composition.