How will the speed of a sound wave change if the temperature of the medium rises? A.
The speed will increase.
B.
The speed will decrease.
C.
The speed will not change.
D.
The speed will initially increase and then return to its earlier value.

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give

How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?