in the previous activity, you established that asteroids likely hit earth with the same frequency and at the…

in the previous activity, you established that asteroids likely hit earth with the same frequency and at the same time as they hit the moon and mars. however, as you saw, earth has much less evidence of this asteroid activity than the moon and mars do.\nin this activity, you will investigate how water on earth might have contributed to the lack of visible craters on earth’s surface compared to other celestial bodies.\npart 1. chemical weathering\nin this part of the investigation, you will perform an experiment to test how water affects earth’s materials and through the processes of chemical weathering\nmaterials:\n- two pieces of chalk\n- white vinegar\n- clear cups\n- electronic balance\n- masking tape\n- water\n- stopwatch\n- goggles\n- forceps\nprocedure:\n1. using the masking tape, label one cup “water” and one cup “vinegar”\n2. measure and mass of each piece of chalk and record it in the data table\n3. place one piece of chalk in each cup\n4. pour water and vinegar over the pieces of chalk in the corresponding cup\n5. set the timer for 5 minutes and begin timing\n6. while the timer is running, record your observations in the data table\n7. after 5 minutes, measure the mass of each piece of chalk and record it in the data table\n8. calculate the change in mass of each piece of chalk and record that number in the data table\n1. state the independent variable in this investigation: \n2. state the dependent variable in this investigation: \n3. write a prediction of how your dependent variable will be affected in this investigation:\n\nperform the experiment according to the steps above and record your data here\nearth and space science unit 6 | probability of life elsewhere | stability of the solar system se | s\nnew visions

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