Answer:
A massive object (like a galaxy cluster) bends the light from an object (like a quasar) that lies behind it.
Explanation:
A massive object, like a galaxy cluster, is able to deform the space-time shape as a consequence of its own gravity, so the light that it is coming from a source that is behind it in the line of sight will be bend or distorts in a way that will be magnified, making small arcs around the cluster with the image of the background object.
This technique is useful for astronomers since they make research of faraway objects (at hight redshift) that otherwise will difficult to detect with a telescope.
The earth is made up of layers (crust, mantle, outer core, and inner core). Each one has a unique make-up to it. This is the outer layer of the Earth about 10 miles or so thick. Mostly made up of rock and loose material
Answer:
Positive and negative
Explanation:
In order to attract to form the ionic compound, those charges are needed
E.g
Na+ (sodium)
Cl- (chloride)
Which ultimately forms NaCl (sodium chloride) which is a ionic compound
Answer:
Our weight on moon is less than it would be on Earth.
Explanation:
Due to a difference of the strength of gravity on the moon. The moon's gravitation force is determined by the mass and the size of the moon. Since the moon has significantly less mass than the Earth, it will not pull objects toward itself at the strength that Earth will. This means that if you went to the moon you would weigh less, even though your mass stays the same.
Answer:
Creating large preserves in biodiversity hotspots
Explanation:
- In order to preserve the biodiversity hotspots, humans must create biodiversity hotspots which are regions that will nurture, preserve and protect the species from the danger of going extinct in the wild or being hunted by other predators or men.
- There will help protect them from dangers and improve the biodiversity of the planet. It will add to the ecological productivity of the environment.
