Am I right?Btw question was “Name four abiotic factors shown in the above prairie ecosystem?

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

There is a single path for electrons. the current decreases when additional resistors are added. the current will be the same in each resistor. these statements best describe a(n) circuit.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line