Summarize the following:
If you'd like to make your mask last longer, you can seal it with a clear, acrylic sealer or a brush-on decoupage glue, such as Mod Podge. Remember to let the mask dry after sealing it.

summary: Let your mask dry.

Summarize the following:
Once you're out of the water, only part of your struggle for survival is complete, because hypothermia is likely fast advancing within your body. As such, once on safe footing, quickly retrace your footsteps or path back to shore and/or your vehicle or cabin so you can get warmed up. Your leg muscles will likely not want to cooperate due to the cold shock, so you may have to crawl or drag yourself. Ask for immediate assistance if there are people nearby. They may not have any survival or emergency medical knowledge, but they can at least help you get to a safe place and maybe call for additional help. Initial signs and symptoms of hypothermia include shivering, dizziness, hyperventilation, increased heart rate, slight confusion, difficulty speaking, clumsiness and moderate fatigue. Signs of severe hypothermia include more advanced confusion, poor decision making, lack of coordination, violent shivering (or none at all), slurred speech or incoherent mumbling, weak pulse, shallow breathing and progressive loss of consciousness. It may seem counterintuitive during the moment, but taking off wet clothes is the fastest way to increase your core body temperature assuming you have dry clothes or a source of heat available. An external source of heat can't penetrate wet clothing and warm you up, so remove them quickly and wrap yourself in dry clothes and/or blankets. Find an area sheltered from the wind or elements before removing clothing, preferably a dwelling or a vehicle. If not, then stand behind some trees, rocks or a snow drift to protect yourself from the additional chill of the wind. If you are only in the early stages of hypothermia and still feel like you have some excess energy, do some push-ups or basic calisthenics after removing your clothes in attempts to warm up and improve blood flow. Once you've removed your wet clothes, you need to find dry replacements and a source of heat quickly. With advanced hypothermia, you may not be shivering any longer or feel very cold. Many patients report feeling numb. If you didn't bring a change of clothes, then ask others for extra clothes, jackets or blankets. Make sure to cover your head and insulate your body and feet from the cold ground. Sleeping bags, wool blankets or space blankets will help you to conserve body heat and rewarm your body. If you don't have a dwelling or vehicle to get warm in, you'll have to make a fire. Make sure you're out of your wet clothing and into something dry before collecting wood and making a fire. Get people to help if they're nearby. Once you are in front of a heat source (fireplace, heat vents in a vehicle, campfire) bring your knees to your chest and keep your legs tight together to conserve your body heat. If you are with other people, huddle together in a tight circle facing each other in order to share body heat. Drink a warm, sweet, non-caffeinated beverage. The mug will warm your hands and the liquid will warm your insides. If you are using heating pads or hot water bottles, place them near major arteries such as near the groin, armpits or shoulders. Always place a barrier between the heat source and your skins to prevent any burns. Extreme heat can damage your skin or trigger irregular heartbeats and a heart attack. Remember, you are trying to slowly and safely increase your core body temperature, and this can take a few hours.

summary: Retrace your footsteps back to safety. Take off wet clothes. Get warmed up.

Summarize the following:
To calculate the density of water you will need a graduated cylinder, a scale or balance, and water. Graduated cylinders are special containers that have lines or gradations that allow you to measure a specific volume of liquid. In order to find the density, you have to know the mass and volume of the liquid in question. You will use the graduated cylinder to obtain the mass of the water, but you have to subtract out the weight of the graduated cylinder so you know you're only measuring the mass of the water itself. Turn the balance on and make sure it is set to zero. Place the dry, empty graduated cylinder on the balance. Record the mass of the cylinder in grams (g). For example, let's say the empty graduated cylinder weighs 11 grams. It doesn't matter how much water you add, but be sure to note the exact amount. Read the volume by looking at the cylinder at eye level and recording the volume at the bottom of the meniscus. The meniscus is the curve of the liquid that you'll see when you look at the water right at eye level. The volume of water in the graduated cylinder is the volume you will use for the density calculation. Let's say you filled the graduated cylinder with 7.3 milliliters (mL) of volume. Make sure the balance is set to zero and weigh the graduated cylinder full of water. Be careful not to spill any of the water out of the top when you weigh it. If you do spill the water, take note of the new volume and re-weigh the water-filled graduated cylinder. For example, let's say the full graduated cylinder weighs 18.3 grams. To get the mass of the water only, you must subtract out the weight of the graduated cylinder. The result is the mass of the water in the cylinder. In our example, the mass of the graduated cylinder is 11 g and the mass of the cylinder full of water is 18.3 g. 18.3 g 11 g = 7.3 g, therefore the mass of the water is 7.3 grams. Using the equation density = mass/volume, you can determine the density of water. Plug in the values of mass and volume you determined and solve. Mass of the water: 7.3 g Volume of the water: 7.3 mL Density of water = 7.3/7.3 = 1 g/mL
summary: Gather your materials. Weigh the empty graduated cylinder. Fill the graduated cylinder with water. Weigh the water-filled graduated cylinder. Subtract the weight of the empty cylinder from the full cylinder. Calculate the density by dividing the mass by the volume.