Tim makes a volcano demonstration for a class. he crafts the volcano out of clay, and then pours vinegar into the baking soda that is inside the volcano. what would be the best way for tim to turn this demonstration into an experiment? a) he could pour the same amount of vinegar into several different volcanoes containing baking soda, repeating the demonstration. he would be answering the question “what happens when i pour vinegar into baking soda? ” b) he could time how long the volcano bubbles after he pours the vinegar into the baking soda. he would be answering the question “how long will my volcano bubble? ” c) he could measure how far the bubbles travel across the laboratory table after he pours the vinegar into the baking soda. he would be answering the question “how far will bubbles travel across a flat surface? ” d) he could add different amounts of vinegar to the same amount of baking soda and time how long it bubbles each time. he would be answering the question “how does increasing the amount of vinegar affect the amount of bubbles that form? ”

Letter D is the best answer

Science27 of the most iconic, jaw-dropping photos of the earth and the moon from spacedave mosher  oct 1, 2018, 11: 13 am etnasa/flickrapollo 11 astronauts took this photo of earth on july 20, 1969.from the ground, earth looks like a boundless fertile plain that beckons to be explored and exploited.but astronauts would beg -  and even plead  - to differ."you realize that people often say, 'i hope to go to heaven when i die,'" jim lovell, an astronaut who flew on the apollo 8 and apollo 13 missions to the moon, previously  told business insider. "in reality, if you think about it, you go to heaven when you're born."lovell has seen first-hand that we live on a tiny rock hopelessly lost in the void. he's also quick to tell you it's the only one we've got - a  fragile spaceship  for more than 7 billion people: "you arrive on a planet that has the proper mass, has the gravity to contain water and an atmosphere, which are the very essentials for life. and you arrive on this planet that's orbiting a star just at the right distance - not too far to be too cold, or too close to be too hot - and just at the right distance to absorb that star's energy and then, with that energy, cause life to evolve here in the first place. in reality, you know, god has really given us a stage, just looking at where we were around the moon, a stage on which we perform. and how that play turns out is up to us, i guess."humanity has recorded photos of earth from hundreds, thousands, millions, and even billions of miles away, some of them taken by lovell himself.these images not only scientists study our dynamic world, but also understand how a habitable planet looks from afar, which aids the search for  more worlds. most importantly, however, the images underscore our peculiar existence on  a mote of cosmic dust.take a moment to ponder 27 of the most arresting images of earth that humankind has ever captured from space.a