Question

c. silicon dioxide
d. sand

1. a mixture that appears to contain only one substance is a(an)...

a. homogeneous mixture
b. heterogeneous mixture
c. compound
d. element

1. a mixture can be classified as a solution, suspension, or colloid based on...

a. number of particles
b. size of largest particles
c. color of its particles
d. size of smallest particles

1. which of the following is malleable?

a. glass
b. pottery
c. ice
d. gold

1. a substance has a melting point of 0°c and a boiling point of 100°c. the substance is most likely...

a. water
b. hydrogen
c. gold
d. table salt

1. what physical properties of nylon and leather make them good for shoelaces?

a. high density, low conductivity
b. durability, flexibility
c. hardness, durability
d. low viscosity, flexibility
section 2: completion
fill in the blanks.

1. matter that always has exactly the same composition is called a

Explanation:

• Question 6: A homogeneous mixture appears uniform throughout, like it contains only one substance. Heterogeneous mixtures have visible different - parts, compounds are made of two or more elements chemically combined, and elements are pure substances made of one type of atom.
• Question 7: Mixtures are classified as solutions, suspensions, or colloids based on the size of the largest particles. Solutions have very small particles, colloids have intermediate - sized particles, and suspensions have large particles.
• Question 8: Malleability is the ability to be hammered into thin sheets. Gold is a metal and metals are malleable, while glass, pottery, and ice are not.
• Question 9: Water has a melting point of 0°C and a boiling point of 100°C at standard atmospheric pressure. Hydrogen has a much lower melting and boiling point, gold has a high melting point, and table salt has a high melting point.
• Question 10: Nylon and leather are good for shoelaces because they are durable (can withstand wear and tear) and flexible (can be tied and untied easily).
• Section 2, Question 1: Matter with a fixed composition is a substance.

Answer:

1. a. homogeneous mixture
2. b. size of largest particles
3. d. gold
4. a. water
5. b. durability, flexibility

Section 2, Question 1: substance