Idc

Question 1

Physical change

Answer 1

Substance undergoes a change in physical properties, change is generally reversible.

Question 2

Chemical change

Answer 2

Chemical substance transformed to 1+ different substances.

Question 3

Physical properties

Answer 3

Properties observed without making a new substance. Ex: colour, texture, smell, state, hardness.

Question 4

Qualitative and quantitative

Answer 4

1. Descriptive, observed not measured
2. Numbers, measurable data

Question 5

Chemical properties

Answer 5

Determined by a substance changed, and a new substance made. Ex: ability to rust, acidity and radioactivity.

Question 6

Matter

Answer 6

Pure substance or mixture.
States: solid, liquid, gas.

Question 7

Pure substance

Answer 7

Element of compound.

Question 8

Mixture

Answer 8

Physically combined, but can separate to original components. 2+ pure substances mixed.

Question 9

Element

Answer 9

Single atom

Question 10

Compound

Answer 10

2+ elements

Question 11

2 types of mixtures

Answer 11

Mechanical (heterogeneous mixture) and homogeneous mixture (solution)

Question 12

Heterogeneous mixture (mechanical mixture)

Answer 12

Components separated, can see different components.

Question 13

Homogeneous mixture (solutions)

Answer 13

Combination of two pure substances. Cannot see separate components.

Question 14

Alloy

Answer 14

Homogeneous mixture of metals.

Question 15

Suspension

Answer 15

Heterogeneous mixture, solids particles don’t dissolve. Suspended throughout, floating freely.