Which events occurred during the Space Race? Select three options.
A. NASA was established.
B. Yuri Gagarin orbited Earth.
C. The Soviet Union launched Salyut.
D. The United States launched Skylab.
E. The United States launched Explorer 1.

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

In which layer do organisms on earth love?