Mineral hardness
way it breaks
luster
streak
color
Galena
2.5
cleavage
metallic
gray-black
silver, gray
Magnetite
6
fracture
metallic
black
black
Hematite
6
fracture
metallic-dull
red-brown
red-brown, silver, black
Susan wants to identify a dark, heavy mineral sample she found in the classroom collection. She
notices there are three minerals in a chart in a reference book that might match her sample. Susan
next observes that her sample mineral has flat, reflective surfaces that break into boxlike steps. She
infers the mineral may be galena. If she is correct, one more test will verify her inference. Which
property would to best for her to observe next?
hardness
O luster
O streak
O color

Could someone me with number one you

If animal agriculture was eliminated, how much grain would become available for human consumption?

(me out over the last several centuries, scientists have made the following broad observations while investigating several branches of the life sciences: -the fossil record shows that different types of organisms have existed at different times in earth's history. -many organisms have similar body structures that seem to be adapted to different ways of living in their environment. -organisms of different species often share similarities in stages of embryonic development. -many species share genetic similarities, and almost all organisms use the same basic building blocks to construct proteins. -often, the extent of two species' similarities can be predicted from their geographic closeness to each other. -a great deal of change has been observed among species that have experienced strong selective pressures through many generations. scientists have carefully considered and rigorously tested the observations listed above. when scientists offer a of these observations, they are making 1.) testable explanation, deductive explanation 2.) scientific interference, scientific law