select whether there is no work done by the system, work done by the system or work done by the surroundings for each system described below:

Scientists observed a rock stratum and discovered some fossils. the image shows the fossils they discovered. what can you interpret from the image? an illustration showing layers rock with fossils embedded in some rock layers1. the dinosaur and the mammoth existed after the trilobites.2. the dinosaur and the armored fish existed before the trilobites.3. the trilobites and the armored fish died before the dinosaur.4. the trilobites and the armored fish were born after the dinosaur.5. the early mammoth is older than the trilobites.

Darwin studied two different types of tortoises on the galapagos islands. sort the characteristics based on which tortoise they describe.

of the following words means "to make something unnecessary"? who talke constantlyor in na