1,302 Answered Questions for the topic physical science
04/11/19
Where can obsidian be found?
Where is obsidian found?
Is it typically found on the surface or underground?
If underground, how far under (meters or feet would be perfect)?
Also, is it found everywhere on Earth, or just in...
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Physical Science 8th Grade
04/09/19
What is the density?
A mass of 43.6 g has a volume of 25.5 mL. What is the density?
04/05/19
Which type of scientific reasoning is being described in the situation?
Consider the situation.Scientists discovered a sedimentary layer of earth with high amounts of the element iridium. This layer was laid down about the time at which the dinosaurs went extinct....
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How significant is a planet's density to the formation of life?
I'm doing some writing set on a fictional earthlike planet that for reasons needs to be substantially larger than Earth but can't have substantially higher gravity. I've been able to compromise...
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Why do crystals, like quartz and diamonds, form in different colors?
Some crystals, like quartz and diamonds, form in a variety of different colors. For example, quartz can be clear, 'foggy', pink, yellow, and even blue.
- What happens during the crystal's...
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Physical Science
03/28/19
Abbie pushes a vacuum cleaner 30m in 5 min using 40 N force. How much did she use?
03/27/19
Why does Coriolis determine the rotation direction of a cyclone but not my drain?
It is a common misconception that Coriolis is responsible for the direction the water swirls down a toilet, tub or sink drain. E.g. does a toilet flush the other way in the southern hemisphere? (If...
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03/27/19
Why is continental crust less dense than oceanic?
Why is it that continental crust is less dense than oceanic, where in fact continental crust is thicker than oceanic crust?
03/27/19
At what humidity does it start to rain?
As far as I understand it is perfectly valid for air to have 100% humidity. At that point, all water can still exist in form of vapor, non-condensed.
**Does it immediately start to rain if...
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03/27/19
viable geothermal energy supply from exhausted fracked gas wells?
The UK legislator with primary responsibility for energy has claimed that exhausted fracked natural-gas wells will be suitable for re-use as a geothermal energy supply (not necessarily geothermal...
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Physical Science Geology
03/26/19
What lithologies are deemed most suitable for the storage of nuclear waste?
I have visited storage- and test facilities that are within salt and clay (Opalinuston) lithologies. What are other lithologies that are considered for the storage of nuclear waste and what are...
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03/26/19
How can I tell if a rock is really petrified wood?
I found a rock in the Mojave desert and it resembles a tree branch including what appears to be wood grain. Is there some test or observation that can be done at home to conclusively answer my...
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Physical Science
03/20/19
Science-How much energy is that anyway?
if you travel 10 miles to school each day and your car gets 24 miles per gallon of gas.how many gallons of gas did you burn in order to get to school.
03/19/19
What is the difference between eluvium and alluvium?
I was reading about kimberlite on Wikipedia and it mentioned eluvium. I've heard of alluvium, alluvial fans, alluvial deposits, etc. However, when I looked up eluvium, it sounded exactly like...
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03/19/19
What was the first rock in the rock cycle?
I am an undergraduate student but I am a tutor at a High School, and one student asked me. Attempting to explain the rock cycle "if one rock turns into the other then which came first" my gut is...
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03/19/19
How and where do double-terminated crystals form?
How and where do double-terminated crystals form?
Most terminated crystals form by 'growing' out of a rock. Which causes one side to be flat,(or whatever the shape of the rock it 'grew' out of was...
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03/19/19
What causes 'positive' lightning to be rarer, higher charged, and longer lasting than 'negative' lightning?
Why is 'positive' lightning rarer, brighter, higher charged, and longer lasting than 'negative' lightning? Are there any other unique characteristics to positive lightning that sets it apart from...
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Is there a reason most mountain ranges seem to run parallel to coastlines?
Eyeballing a map of the world, it seems that most mountain ranges that don't occur along continental fault lines run parallel to coastlines. Is there a reason for this?
03/19/19
Why do rocks on other solar system bodies that have an atmosphere seem to be flat?
Images taken by landers on Titan and Venus and Mars show landscapes where rocks, to me at least, are surprisingly flat. Being used to walking around in forests with roundish meter sized boulders,...
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03/18/19
How do seismologists locate the epicenter and focus of an earthquake?
I know the focus of an earthquake is where the earthquake originated from, but what I could never figure out is, how to scientists find out where exactly the focus (and epicenter) are located?
How are boulders formed on asteroids?
For example: Are they soft landed meteorites? Or do they form from melted material during a violent impact? Or are they the result of some kind of erosion process?
How to learn the different types of rock?
I would like to be able to point to a piece of rock and say that is rock type *such and such*. I have tried learning but it literally seems like an endless list of types and sub types and the...
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