A student examines a cell under the microscope and sees chloroplasts. Which of the following could be the source of the cell? O Giraffe
Fish
Human
O Tree
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N
3
3
4
5
5
6

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

When a scientific theory has been tested and proved by the scientific community, it becomes a law

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?