Matter:Properties and Change
How are elements similar to those in the same group on the periodic table?
They have the same number of valence electrons.
How does the use of wood to produce energy affect the environment?
Deforestation eliminates the habitats of organisms.
How does intrusion X compare to the ages of the other rock layers and fossils in this geologic column?
Intrusion X is younger than the broad leaf and fern fossils.
Which choice best describes the properties of potassium (K), based on its position on the periodic table of elements?
a highly reactive metal
A heavily wooded area needs additional solar collectors to meet energy demand. Which statement describes a possible environmental consequence of adding these collectors?
Trees will need to be cleared for the solar collectors to work efficiently.
Which is true?
Intrusion X is younger than layers Z and Y.
A student is testing a solid material to determine whether it is a pure substance or a mixture. Which observation would MOST likely indicate that the material is a mixture?
The material has crystals of two different colors.
Which of the following correctly identifies how a power plant changes the atmosphere?
A plant powered by natural gas releases carbon dioxide.
Which is younger than the clam fossil?
Reptile bone
A student passes a magnet over 10 grams of a powder. Four grams of the powder stick to the magnet, while 6 grams do not. Which of these identifies the substance?
mixture
Why does oil take so long to form in nature?
The process of burying remains under deep sediment takes millions of years.
Which is younger than the broad leaf fossil?
intrusion X
In 1804, the Italian geologist G. Thompson, who was studying an iron-nickel meteorite, attempted to clean the dull patina from it by using a nitric acid wash. Strange figures like the ones in the photo below soon emerged on the surface. These patterns are now known as Widmanstätten patterns. These patterns are the result of an extraordinarily slow cooling (millions of years) of the metal meteorite.
It is a crystalline solid.
Surface mining for coal involves removing all the vegetation and rock above the coal being mined. Which two of Earth’s subsystems are MOST immediately affected by surface mining?
lithosphere and biosphere