Classification of matter

Classification of matter

Atoms

• Basic unit of matter

• Has mass and volume

• Subatomic particles: protons, neutrons, and electrons

Elements

• Made from one type of atom.

• Cannot be broken down.

• Found on the periodic table

Compounds

• Created when 2 or more elements chemically combine

• Can be separated chemically

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Mixtures

• Mixtures are physical combinations of two or more different substances that retain their own individual properties and are combined physically (mixed together)

• Mixtures can be separated by physical means 

Multiple Choice

Which type of matter can be separated by physical means?

• element

• compound

• mixture

Multiple Choice

Which type of matter can only be separated by chemical means

• element

• compound

• mixture

Multiple Choice

Which type of matter cannot be separated?

• element

• compound

• mixture

Types of mixtures

• heterogeneous mixture

• homogeneous mixture

Multiple Select

Check all that are heterogeneous mixtures

• saltwater

• salad

• pizza

• air

Multiple Select

Check all that are homogenous mixtures

• milk

• air

• koolaid

• vegetable soup

Multiple Select

Which of these are compounds

• water (H2O)

• oxygen

• NaCl(table salt)

• sugar (C6H12O6)

Multiple Choice

Which of the following is an example of a compound?

• copper

• iron

• carbon

• water

Multiple Choice

What is the smallest unit of an element that retains the properties of that element?

• electron

• molecule

• neutron

• atom

Multiple Choice

Which substance is composed of only one type of atom?

• water

• gold

• salt

• sugar

Multiple Choice

which of these samples shown represents an element

• 1

• 2

• 3

• 4

Multiple Choice

Which term correctly describes all of the following substances?

salt water, vinegar, bronze, air, beach sand

• elements

• compounds

• mixtures

REVIEW

Multiple Choice

Which would indicate the water in a lake is not safe for drinking?

• many varieties of fish in the lake

• high dissolved-oxygen levels in the lake

• cold water temperature of the lake

• high turbidity levels in the lake

Multiple Choice

Which is the best reason for scientists to study ice cores obtained from Earth’s ice caps?

• to evaluate potential oil drilling sites

• to study the quality of water stored in glaciers

• to determine the rate of melting in polar regions

• to study past climates by analyzing trapped gases and particles

Multiple Choice

Which characteristic of water quality provides the most information regarding the health of a water system?

• clarity

• temperature

• concentration of heavy metals

• presence of indicator species

Multiple Choice

Which allows scientists to investigate what Earth’s climate was like over the past 740,000 years?

• volcanic deposits

• fossils

• faults

• ice cores