find out adjectives in the following handout-
What is matter? Matter is everything around you. Matter is defined as anything that has mass and takes up space (it has volume). What is mass? Mass is the amount of matter in an object. You might have a small object with a lot of mass such as a statue made of iron. You might have a large object with very little mass such as a balloon filled with helium.
You should also know there is a difference between mass and weight. Mass is a measure of the matter in an object (which means that the atoms are more tightly packed together) while weight is a measure of gravity’s pull on an object (the volume of something increases gravity’s pull, so increases the weight). If you would travel to the moon your weight would be less, because gravity’s pull on you is weaker. Your mass would stay the same, because the amount of atoms in your body stays the same and your volume stays the same. What is volume? Volume is the amount of space something occupies. Words such as big, little, long, or short are used to describe volumes. A marble takes up a small volume while a star occupies a large volume. Different states of matter will fill volumes in different ways. Think of a rock, a cup of water and oxygen filling a closed container. Even though matter can be found all over the Universe, you will only find it in a few forms (states) on Earth. We cover 4 states of matter. Each of those states is sometimes called a phase. There are many other states of matter that exist in extreme environments. Scientists will probably discover more states of matter as we continue to explore the Universe.
What are the main states of matter? Everyone should know about solids, liquids, gases, and plasmas. Scientists have known about solids, liquids, and gases for a long time. Plasma was a new idea when it was identified by William Crookes in 1879. What makes a state of matter? It's all about the physical state and energy (vibration and heat) in the atoms and molecules. Think about solids. Physical properties of a solid often include "hard" and "brittle." Liquids are fluid, move around a little, and fill up containers. Gases are always around you, but the molecules of a gas are much farther apart than the molecules in a liquid. If a gas has an odor, you’ll often be able to smell it before you can see it.
What is a physical change in matter? Molecules can move from one physical state to another (phase change) and not change their molecular structure (structure of molecules). Oxygen (O2) gas has the same chemical properties as liquid oxygen. The liquid state is colder and denser (less energy: less vibration, less heat), but the molecules are the same. Water (H2O) is another example. A water molecule is made up of two hydrogen (H) atoms and one oxygen (O) atom. It has the same molecular structure whether it is a gas, liquid, or solid. Although its physical state may change because of different amounts of energy, its atomic structure remains the same.
So what is a chemical change in matter? Let's start with that glass of pure water. If the formula of water were to change, that would be a chemical change. If you could add a second oxygen atom to a water (H2O) molecule, you would have hydrogen peroxide (H2O2). The molecules would not be "water" anymore. In reality, there are a variety of complex steps which scientists have to take that go into creating hydrogen peroxide from water. Physical changes are related to changes in the immediate environment such as temperature, pressure, and other physical forces. Chemical changes occur when the bonds between atoms in a molecule are created or destroyed.
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following 1questions rajani buy shoes whether rs 425 and a school bag worth rs 268 how much more does she spend than on the school bag
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following 1 questions rajani buy shoes whether rs 425 and a school bag worth rs 268 how much more does she spend than on the school bag
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