Nature of Science
Convert 12cm = _____mm
120 mm
What determines the chemical behavior of an element?
What are the valence electrons?
What is a mineral’s relative resistance to being scratched called?
What is hardness?
The remains, traces, or imprints of ancient organisms.
What are fossils?
The mechanical layer of earth made of mostly liquid metal and is responsible for Earth’s magnetic field:
What is the outer core?
A measure of the amount of matter in an object is called
What is mass?
The sum of the number of protons and neutrons in the nucleus of an atom.
What is the mass number?
A mineral is __________ if it can be mined for profit.
What is an ore?
We base geologic time units mostly on fossils contained within
What are rock layers?
Write the following in scientific notation: 3,250,000
3,25 x 106
An observation made using your senses is referred to as a ___________ observation.
What is a qualitative observation?
Atoms of the same element with different mass numbers.
What are isotopes?
A mineral's __________ is the color when it is powdered.
What is streak?
States an intrusion is younger than the rock it cuts across.
What are cross cutting relationships?
When cooling magma or lava contains a lot of silica, forming a felsic or granitic rock, its grains/crystals are usually __________.
What are light in color?
A measure of the gravitational force on an object is called
What is weight?
An electrically charged atom
What is an ion?
What is caused by the presence of trace elements in a mineral?
What is color?
What percentage of parent isotope remains after 2 half-lifes pass?
What is 25%?
The variable that is being measured in an experiment.
What is the dependent variable?
A scientific observation made by using the five senses, then recording the data
What is qualitative?
Composed of two or more atoms held together by a covalent bond
What is a molecule?
This is a common measure of density used by geologists.
What is specific gravity?
If a radioactive isotope has a half-life of 400 million years, how long will it take for 75 percent of the material to change to daughter product?
What is 800 million years?
When using relative dating, which layers can be determined to be the youngest?
Layers that cut across others or those layers at the very top