Question

question 18 one group of students did an experiment to study the movement of ocean water. the steps of the experiment are listed below. 1. fill a rectangular baking glass dish with water. 2. place a lighted lamp near the left edge of the dish. 3. place a plastic bag with ice in the water near the right edge of the dish. 4. put a few drops of ink in the water. 5. observe the ink flow from the side where the lamp is placed towards the side where the ice - bag is placed. what does the students experiment most likely demonstrate? surface water sinks when heated. surface water moves from colder to warmer regions. surface water moves from warmer to colder regions. surface water moves irrespective of water temperature. question 19 beta particles are emitted from radioactive atom p when it disintegrates spontaneously to form non - radioactive atom q. which of these statements is most likely correct about atom p and atom q? the nucleus of atom p emits neutrons and protons. the nucleus of atom q emits neutrons and protons. the nucleus of atom p is more stable than the nucleus of atom q. the nucleus of atom q is more stable than the nucleus of atom p.

Explanation:

For Question 18, the lamp heats the water on one - side and the ice cools the water on the other side. The ink flow from the lamp (warmer) side to the ice (colder) side shows that surface water moves from warmer to colder regions. For Question 19, a radioactive atom (Atom P) disintegrates to form a non - radioactive atom (Atom Q). Non - radioactive atoms are more stable than radioactive ones, so the nucleus of Atom Q is more stable than the nucleus of Atom P.

Answer:

Question 18: C. Surface water moves from warmer to colder regions.
Question 19: D. The nucleus of Atom Q is more stable than the nucleus of Atom P.