Which of these hypotheses cannot be tested? O A. Sedimentary rock layers always contain fossils. O B. Dinosaurs became extinct millions of years ago. C. Bones are more likely to become fossils than soft tissue like skin. OD. If dinosaurs were alive today, people could train them to do work.​

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

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