A student placed fruit in a tightly sealed bag and found the mass of the fruit every week. She found the mass did not change over time even though the fruit was going through a chemical change. Is this an example of the Law of Conservation of Mass? Why or why not? Answer in sentences.

Mr Johar gives daisy two solutions. He tells her to choose the best indicator to find out which solution is pH 4 and which is pH 6. Write down which indicator daisy should use. Explain your answer.

The surface currents are affected by the continental deflections, winds and the coriolis effect. Density is not a parameter affecting surface currents. Thus option B is correct.

Global wind systems, which are powered by solar energy, propel surface currents. Through these currents, heat is transferred from the tropics to the poles; the Gulf Stream, for example, transports warm water from the eastern US coast up to Northern Europe.

When objects travel far distances around the Earth, they are deflected in a manner known as the Coriolis effect. Currents appear to bend to the right in the Northern Hemisphere and to the left in the Southern Hemisphere due to the rotation of our planet.

Both ocean currents that transferring water current and surface currents are affected by global winds and coriolis affects. But they are not influenced by the density factor.

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