Ch 2 Review Test (Check x71)

Which of the following is NOT a property you might use to describe a material in a science activity?

• Smell

• Color

• Taste

• Manipulation

Why might a cook use a wooden spoon to stir a pot of soup, based on the properties of materials?

• Because wood does not conduct heat well

• Because wood is shiny

• Because wood is magnetic

• Because wood dissolves in soup

Which of the following is classified as a pure substance?

• Mixture

• Solution

• Element

• Suspension

What is the main difference among solutions, suspensions, and colloids?

• Their color

• The size of their particles

• Their boiling points

• Their melting points

Why is it necessary to put care instructions on a clothing label?

• To make the clothes look attractive

• To ensure the same cleaning method is used for all materials

• Because different materials require different cleaning methods

• To increase the price of the clothing

Which of the following is an example of a heterogeneous mixture?

• Salt water

• Air

• Salad

• Pure gold

What is a key reason for classifying matter into elements, compounds, and mixtures?

• To make science more complicated

• To better understand their properties and uses

• To increase the number of scientific terms

• To make labeling easier

Which of the following is classified as a pure substance?

• Table salt

• Laundry detergent

• Orange juice

• Bread

What is the smallest particle of an element that still has the properties of that element?

• Atom

• Molecule

• Compound

• Mixture

Which of the following statements is true about elements?

• No two elements contain the same type of atom.

• All elements are solids at room temperature.

• Elements can be broken down into simpler substances.

• There are thousands of elements.