A good scientific hypothesis must have if and then in the sentence.
Answer:
Cross-Sectional Research Method
Explanation:
Cross-Sectional Research Method often referred to as cross-sectional analysis, is a form of research study, in which the researcher gather data to make deductions about subjects or population of interest at a particular point in time. It is conducted such that, a researcher might gather data from selected groups of different age, class or level at one point in time. Thus, deductions or inferences can be made based on the age, class or level differences rather than things that occurred over a time.
Hence, Max is considered to be using Cross-sectional research method, since he is using population of different groups based on age to conduct research or gather information.
You have to put premium or it will cause engine damage
Answer:
The four spheres of Earth drive all of its processes and support life on our unique planet. In this video lesson, you will see examples of how Earth's spheres interact with each other to form an overall complex and connected system.
Earth's Spheres Interact
In another lesson, we learned about Earth's four spheres. These are the geosphere, hydrosphere, biosphere and atmosphere. Together, they make up all of the components of our planet, both living and non-living. And while we can describe each individually in terms of its properties and features, you'd have a difficult time finding an example where one sphere doesn't either touch or interact with at least one other.
This is important because these interactions are what drive Earth's processes. Material on Earth doesn't stay how it is. It gets recycled into other phases and forms. Plants in the ground die, and as they are broken down by microorganisms, they become soil, which can then feed new plants. Water cycles through different phases and locations, like when it evaporates from the oceans and then rains down onto the ground or into a lake. Rock also gets recycled under Earth's surface, where it is melted down and then sent back up in volcanic eruptions.
Explanation:
Answer:
correct option is B. Primer residue
Explanation:
correct answer is Primer residue because primer residue are form from the ignition of the chemicals in primer when the firearm is discharge
and the result in formation of microscopic particle that is blown out of various opening in weapon when this weapon is discharge
and this primer residue is deposit on hand as firing weapon and hand weapon
but in the absence of primer residue on hand it is consistent with individual not have fire
so correct option is B. Primer residue
