Which label belongs in the area marked y? must involve temperature differences between substances or objects occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter.

James needs to move this box. he has already checked it and knows it is not too heavy for him to lift. he also has a clear path and a place to safely set down the box. tell james what to do next to safely lift this box by placing the steps in the correct order. place the options on the left in the correct sequence by dragging them to the appropriate answer box to check your answer.

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Respiration involves the breakdown of sugar. this process results in the production of energy for the cell. i'm order for cells to produce the most energy, what gas should be present?