Which of the items below could scientists use to date a layer of rock?

a raindrop on the rock

a fossilized fish

a green leaf that fell off of a tree

an insect flying near the dig site

25 g of ethyl alcohol is dissolved in 100 ml of water (density = 0.99993 at 20 oc). what is the % w/w for the ethyl alcohol in the resulting solution?

Which of these methods could are used to separate an insoluble solid and soluble solid

Which best explains the relationship between evaporation and temperature? a) A liquid evaporates slower at lower temperatures because the molecules are more spread apart and are not pushed as easily from the liquid's surface.

What's the difference between an electron?

What is happening in this equation 2c3h8+10o2

Write an equation that shows the formation of the phosphide ion from a neutral phosphorus atom.

Which of the following terms is defined by the measure of mass per unit of volume? gravity density weight acceleration

Select the lon. O NO₂ H2SO4 O A3

True or False: A Solar eclipse occurs when Earth casts a shadow on the Moon.

To which digestione organ dose food travel it leaves the stomach