science part 2

Question 1

What is the method of separation that uses a sieve to separate particles based on size?

Answer 1

Sieving

Question 2

True or False: Filtration is a method used to separate soluble substances from insoluble substances.

Answer 2

True

Question 3

What method involves using a magnet to remove magnetic materials from a mixture?

Answer 3

Magnetic separation

Question 4

Fill in the blank: The method of separation that relies on differences in boiling points is called __________.

Answer 4

distillation

Question 5

Which physical separation method involves the use of a centrifuge?

Answer 5

Centrifugation

Question 6

What is the primary property that distinguishes metals from nonmetals?

Answer 6

Metals are generally good conductors of heat and electricity.

Question 7

True or False: Nonmetals are typically malleable and ductile.

Answer 7

False

Question 8

What property is characteristic of semimetals?

Answer 8

They have properties intermediate between metals and nonmetals.

Question 9

Which of the following is NOT a property of metals? a) Luster b) Brittle c) High density

Answer 9

b) Brittle

Question 10

Fill in the blank: __________ is a method of separation that uses differences in solubility to separate components.

Answer 10

Extraction

Question 11

What is the method of separation that uses differences in density to separate liquids?

Answer 11

Decantation

Question 12

True or False: All metals are solid at room temperature.

Answer 12

False

Question 13

What is a common property of nonmetals?

Answer 13

They are poor conductors of heat and electricity.

Question 14

Which property is NOT characteristic of semimetals? a) Conductivity b) Luster c) High malleability

Answer 14

c) High malleability

Question 15

What is the term for the physical separation method that involves evaporating a solvent to obtain a solute?

Answer 15

Evaporation

Question 16

Fill in the blank: __________ is a method of separation that uses a porous barrier to separate solids from liquids.

Answer 16

Filtration

Question 17

What is the primary method used to separate components in a homogeneous mixture?

Answer 17

Distillation

Question 18

True or False: Metals typically have high melting and boiling points.

Answer 18

True

Question 19

What is a defining characteristic of nonmetals in terms of physical state?

Answer 19

Many nonmetals are gases at room temperature.

Question 20

Which of the following is a property of metals? a) Dullness b) High conductivity c) Low density

Answer 20

b) High conductivity

Question 21

Fill in the blank: __________ is the process of separating mixtures based on particle size using a screen or mesh.

Answer 21

Sieving

Question 22

What is the method of separation that utilizes the differences in the volatility of components?

Answer 22

Fractional distillation

Question 23

True or False: Semimetals can conduct electricity but not as well as metals.

Answer 23

True

Question 24

What is the term for a method that separates mixtures based on differences in their physical properties?

Answer 24

Physical separation

Question 25

Fill in the blank: __________ is a method of separation that involves the use of a spinning force to separate substances.

Answer 25

Centrifugation

Question 26

What is a common use of the filtration method?

Answer 26

To purify liquids from solid impurities.

Question 27

True or False: Nonmetals are typically good conductors of electricity.

Answer 27

False

Question 28

Which physical property is NOT true for metals? a) High density b) Ductility c) Brittleness

Answer 28

c) Brittleness

Question 29

What is the method of separation that involves pouring off a liquid from a settled solid?

Answer 29

Decantation

Question 30

Fill in the blank: The ability to be drawn into wires is called __________.

Answer 30

ductility

Question 31

True or False: Metals are generally opaque and have a shiny appearance.

Answer 31

True