It's "A" - Galaxies are made up of some stars that have objects orbiting them and some stars that do not. I am 100% sure, I just took the test.
Answer:
1.B 2.A,C,D
Explanation:
A mineral is a naturally occurring, inorganic compound with a unique chemical structure and physical properties. A rock is a solid, stony mass composed of a combination of minerals or other organic compounds. For example, quartz and feldspars are minerals, but when formed together, they make a rock, granite.
Answer:
The ocean basins and the continents compose the crust, the outermost layer. Earth's crust is between three and 46 miles (five and 75 km) deep. The thickest parts are under the continents and the thinnest parts are under the oceans.
Hope this helps!!
(a) vaccination is injection given to children to prevent from diseases
(b) Edward Jenner is the first scientist to prepare a vaccine
The Crust and Lithosphere (which are almost synonymous) are not typically divided into two distinctive layers, so we can reject them.
The correct answer is is the core: (b). The inner core is solid and it's made of iron and nickel. The outer layer is liquid and this is the reason for the differentiation of the two parts.
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