Answer:
No one can see in total darkness. Fortunately, there’s almost always some light available. Even if it’s only dim starlight, that’s enough for your eyes to detect. What’s truly amazing is how little light is required for you to see.
Human eyes have two main features that help us see better in low light: the pupil’s ability to change size, and the eye’s two types of light-sensing cells.
Opening up to let in more light
Your pupils are the black areas at the front of your eyes that let light enter. They look black because the light that reaches them is absorbed inside the eyeball. It’s then converted by your brain into your perceptions of the world.
You’ve probably noticed that pupils can change size in response to light. Outside on a bright sunny day, your pupils become very small. This lets less light into the eye since there’s plenty available
One is A I think... 2 is B... 3 is C...4 is C... 5 is A...
Select all the correct answers. Which two statements are true about energy transformations?
Energy is never released from an object as heat.
Energy is never transformed between kinetic energy and potential energy.
<u>Energy is never created. </u>
Energy is never completely transformed.
<u>Energy is never destroyed.</u>
<u>Question</u>:
Which activity produces the smallest amount of greenhouse gases?
a. driving a car
b. riding a bicycle
c. cooking with gas
d. operating a generator
<u>Answer</u>:
Riding a bicycle produces the smallest amount of greenhouse gases
<u>Explanation</u>:
Cars and other heavy vehicles account for approximately 1/5th of the United States emissions, producing carbon dioxide and other greenhouse gases such as methane and nitrous oxide. Cooking gas too produces a lot of carbon dioxide. Natural gas too basically consists methane in an odourless form and therefore when released produces greenhouse effects and in turn causes detrimental effects on the environment.
The generators that are used both at low scale and also in high level industries is known to produce toxic levels of carbon monoxide and methane. Compared to all these, a bicycle which produces greenhouse gases during its production does not release as much greenhouse gases and the rest.
