Comparing my answer to the "suggested answer" in the back of the book.

Question

Q: Using an example, explain how convection currents are formed.

My Answer: Convection currents are formed as a result of different densities in a fluid. For example, in a pot of water, when the water is heated it becomes less dense than the surrounding water. The surrounding water will displace the hot water, forming a convection current.

Textbook answer: Convection currents occur when different densities exist within a fluid. For example, if a pot of water is heated, the water molecules at the bottom of the pot receive heat (thermal) energy. As this water becomes hot, the distance between the molecules expands, and the water at the bottom of the pot becomes less dense. Since the colder water at the top of the pot is denser than the warm water at the bottom, the colder water sinks and pushes the warm water upwards, forming a convection current.

How does my answer compare to the given one? How would I be marked?

Also how do I get better at science? I can't differentiate between what I need to remember and what's not too important, even though I can always understand the concept.

Answer 1

Your answer is fine. I would mark it 3.9 on a 4.0 scale

Second question: Understand the concept, and how to apply it. The application demonstrates understanding. You can do this by making note cards, writing, teaching other kids. Have you ever has a study buddy?

Answer 2

connections users, LESSON3, UNIT1
1.D
2.C
3.A
4.B
5.A
6.C
7.A
8.A