What natural event causes sudden changes to the earth's surface?
a.
global warming
b.
solar flares
c.
earthquakes
d.
glaciers

Some plants rely on the wind to reproduce an example is it’s important for plants to use the forces of nature to reproduce because 1. 1a white tuft of dandelion seeds 2a spiked burrs surrounding seeds 3a hard shell on a walnut? 2. 1b require pollination to reproduce 2b reproduce only asexually 3b cannot move about freely?

When analyzing tree rings, what do scientists assume a thin ring indicates?

Beth’s hygrometer is reading a temperature of 30 c and a relative humidity of 65%. the humidity in the air is?