Science

Question 1

physical science

Answer 1

The study of non-living matter and energy

Question 2

difference between precision and accuracy, and how each is determined

Answer 2

Precision is how close the measurements are
Accuracy is how close it is to the accepted value

Question 3

element

Answer 3

A pure substance that consists of atoms with the same atomic number

Question 4

compound

Answer 4

A pure substance consisting of atoms of two or more elements that are chemically combined in a fixed ratio

Question 5

mixture

Answer 5

A physical combination of 2 or more elements in a changeable ratio

Question 6

homogeneous vs heterogeneous

Answer 6

Homo: The same
Hetero: Different

Question 7

isotope

Answer 7

An atom of a element that has a different number of neutrons compared with other atoms of that element, resulting in a different mass number

Question 8

polarity

Answer 8

Unequal distribution of electric charge in a covalent bond