Matter and Energy, Elements and Atoms

Question 1

SI base unit of mass

Answer 1

kg

Question 2

SI Unit of length

Answer 2

m

Question 3

SI Unit of time

Answer 3

s

Question 4

Accuracy

Answer 4

Agreement of a particular value with the true value.

Question 5

Precision

Answer 5

Degree of agreement among several measurements
of the same quantity.

Question 6

How do you determine number of sig figs for addition or subtraction?

Answer 6

Smallest number of DECIMAL PLACES

Question 7

How do you determine number of sig figs in division or multiplication problems?

Answer 7

Smallest number of SIG FIGS

Question 8

Extensive property

Answer 8

physical properties that
depend on the quantity of
matter

Question 9

Intensive Property

Answer 9

independent of the quantity
of matter

Question 10

Density

Answer 10

Measure of how compact a substance is (density=mass/volume)

Question 11

Physical change

Answer 11

Change in the form of a substance, not in its
chemical composition.

Question 12

Chemical change

Answer 12

A given substance becomes a new substance or
substances with different properties and different
composition

Question 13

Kinetic energy

Answer 13

Energy due to motion; E_k=1/2mv²

Question 14

Potential Energy

Answer 14

the energy that a body possesses due to its position in a field of force; E_p=mgh

Question 15

Electromagnetic energy

Answer 15

energy due to attractions and repulsions between electric charges; E_p=k(q₁q₂)/r