Science 2.1

Question 1

pure substances

Answer 1

The same composition and cannot be broken down by physical properties

Question 2

Element

Answer 2

A substance that can’t be broken down into smaller substances

Question 3

mixtures

Answer 3

Composition isn’t fixed and takes on the properties of the things that make it up

Question 4

Compound

Answer 4

A substance made from two or more simpler substances. Can be broken down into smaller substances.

Question 5

heterogeneous

Answer 5

The parts are different so they are easy to distinguish

Question 6

homogeneous

Answer 6

Evenly distributed and are hard to distinguish

Question 7

Solution

Answer 7

The substance dissolves and homogeneous two or more types mixed tg

Question 8

suspension

Answer 8

A heterogeneous mixture that separates and particles scatter in light

Question 9

Colloid

Answer 9

particles are medium sized between solution and suspension. Heterogeneous and particles scatter in light.

Question 10

Why are elements and compound classified as pure substances?

Answer 10

every sample of a given substance has the same properties because a substance has a fixed and uniform composition. an element has a fixed composition because it contains one type of atom. A compound always contains two or more elements joined in a fixed proportion.

Question 11

how do mixtures differ from pure substances?

Answer 11

The properties of a mixture can vary because the composition of a mixture is not fixed

Question 12

What is the main difference among solution, suspension and colloids?

Answer 12

based on the size and the largest particle, a mixture can be classified as a solution, a suspension or colloid