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Science in our world - 4th gr.

Science, Grade 4

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Study Guide Science in our world - 4th gr. Science, Grade 4

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SCIENCE IN OUR WORLD Science is Everywhere! Science is ALL around us, no matter where you look! Whether you are at home, outside, at school…you see signs of science and its happenings everywhere! Keeping Ourselves Healthy We know about cells from science. We need to take care of our cells, such as our skin cells, for example. The sun can damage our skin cells leading to disease, but luckily, there are ways we can help protect our skin cells from such damage. One way we can protect our skin cells is to put on sun block before going outside. Sun block protects our skin against too much of the Sun’s rays. Everyday Science Events You take part in the science of respiration when you breathe! We breathe in oxygen and breathe out carbon dioxide. Plants take in that carbon dioxide and release oxygen into the air for us to breathe. You may observe science right in your front yard: Let’s say a duck laid her eggs near the front porch of a house instead of near the small woods nearby. Why do you think a duck would lay her eggs near your house instead of in the woods? Think of it like a scientist. The duck may be fearful of the animals that live in those small woods, animals such as a fox that may eat or harm her eggs. She may have decided to lay her eggs where she thinks they will be safe from animal predators. You can witness a complete metamorphosis life cycle when you view the life cycle of a butterfly. Look for caterpillars in your yard. Do you see any cocoons? How about butterflies? Do you see any flying around outside today? © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
You may hear about science in the news: Around the world, several areas have been experiencing warmer than usual temperatures. Warmer temperatures have been causing the surrounding bodies of waters to warm as well which in turn affect the invertebrates and fish which live in them. Some can’t survive in warmer waters. What are those organisms going to do to survive? Will they survive? You listen to the radio and hear that there has been a 4.3 earthquake in California. The 4.3 refers to the earthquake’s measurement on the Richter Scale, a scale that determines the magnitude or size of an earthquake. A tsunami is a series of huge waves that occur often because of an underwater disturbance, such as an earthquake or volcano eruption. A tsunami occurred in 2004 due to a large earthquake in the Indian Ocean that greatly affected many countries such as Sri Lanka, India, Maldives, Indonesia and Thailand. The United States has many laws and Acts that help protect the air we breathe and the water we drink both have a lot to do with science: The United States Congress passed the Clean Air Act in 1963. This Act has been amended several times since it was first passed. The Clean Air Act helps reduce air pollution and smog by setting strict standards that industries need to follow. Scientists studied air and water and pollutants and told our government what would be safe and what would not be safe, and the law was made to protect us. The Safe Drinking Water Act was established to protect the quality of drinking water in the United States. You even experience science when you eat: It’s dinner time and you are starving. Your Mom put a delicious piece of pizza in front of you. Even before you take a bite, saliva starts filling your mouth from glands inside your mouth. Your saliva contains chemicals that help start to break down your food so your body can digest it, even before you swallow. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Everyday you walk, talk, and move around in many ways. All these things require energy. The process of digestion releases energy in your body every day so that you can do all the moving that you do. Our bodies need minerals, which are natural substances found in the Earth. We get these minerals from the food we eat. You experience science in many ways when you are sick: When you are sick you have a lot of bad guys that are attacking the inside of your body. Luckily you have your own army to help fight off these attacks. Your army is made up of white blood cell soldiers! White blood cells are created in your body to fight off foreign and diseased cells. The worse the infection you have, the more white blood cells your body creates to fight the infection. This is why a raised white blood cell count indicates you have an infection. New discoveries happen constantly, and scientists update what we know about the world around us and inside us. Scientists changed one set of animal classification after studying the groups more thoroughly. Animal classifications went from a Five Kingdom classification system to a Six Kingdom classification system. They split the Monera group into two: eubacteria and the archaeabacteria. Scientists separated the Monera group because they discovered these groups are very different and do not belong in the same group according to many scientists. There are many organizations that dedicate their time to science. Take those that help animals from becoming extinct. Animal conservation organizations help protect and preserve living species that are in danger of becoming extinct. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Science on display at night: Have you ever seen a meteor shower? Meteors are small fragments of debris from space that enter the Earth's atmosphere at extremely high speed. They then turn into a vapor leaving a streak of light that disappears quickly. Look at the picture below. You can tell the moon in this phase comes before the full moon phase and is waxing (meaning visible area is getting larger) because the moon’s visible surface is on the right side. You can easily tell if the moon is waxing or waning but remembering this little poem: if it is white on the right, means it’s gaining in might! When you listen to the weather report, you’re hearing science in action: You hear on the radio that a high air pressure system will be moving in tomorrow, which means there is a very good chance of clear skies. But if you hear that a low air pressure system is moving into your area, you may want to grab your umbrella. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Science is FUN: Did you ever go to an amusement park? Do you like roller coasters? We know roller coasters are ALL about science…gravity, friction, and SPEED…that is what you feel as you fly through the air on a roller coaster! Electricity is science at work: You can conserve electricity in your house, which is good for the environment, in many ways, such as turning off the light when leaving room. Science is helpful and improves the lives of many people everyday! A cochlear implant is an electronic device that is implanted during surgery into the inner ear and restores some hearing to the deaf. You can make a CAREER out of science too: There are many types of scientists: a biologist studies living organisms and their environments, a zoologist studies animals, a botanist studies plants, a paleontologist studies fossils, and a cytologist is one who studies cells! The study of cells is known as cytology, which many scientists study to find cures for diseases. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
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