Show Did you know that our universe is stretching out in all directions? It's true! Ever since the universe began about 13.8 billion years ago, it's been stretching out and expanding. Even today, as we use telescopes to see galaxies far away, we see they are moving away from us. And that’s not all. The farthest galaxies are moving faster than the ones close to us. This happens because of how the universe began, which we sometimes call the "Big Bang." In this activity, you'll make your own stretchy universe slime. What you need:
Caution! Do not eat borax, and don't wipe it in your eye. Borax is safe to use, and in fact is an ingredient in many laundry soaps, but do NOT put it in your mouth. You also don't want to have it on your hands and wipe your eye. If you do, rinse thoroughly with water. Refer to the borax package with any other safety concerns. What to do:
Note: You may also use white school glue, but your universe slime will be lightly colored and opaque. Storing your universe slime:To keep your universe slime from drying out, store it in a sealed sandwich bag. Do not wrap it in foil or wax paper because it will stick to those materials. Download a PDF of this activity.article last updated October 7, 2020 What makes slime stretchy and soft?Body lotion makes the slime stretchy. Add more for extra stretch. Baby oil makes the slime less sticky so it doesn't stick to your hands as easily. Cornflour makes the slime hold its shape.
What do I do if my slime is too stiff?One of the easiest ways to soften up tough or hard slime is to add about a spoonful of water and then to knead it into your slime until it returns to its regular stretchiness, according to WikiHow.
Why is my slime not stretchy?Make sure your activator is properly mixed together before adding it in. If you are using a mix of Borax and water, sometimes the Borax powder sinks to the bottom, so you are adding more water to your slime instead of Borax.
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