Problem: Article: If you want to take your cat outdoors to get exercise or some sunshine, they may end up eating grass. To keep your cat away from grass, contain them to a sidewalk or driveway, a back deck, or a sun porch. You may also take your cat out on a leash. If your cat has become obsessed with eating grass, you may need to remove them from all sources of grass. If your cat is an outdoor cat or is allowed to go outside, you should bring them inside so they can't eat any grass. You may need to keep your cat away from grass for days or weeks to help break the habit. To help keep your cat from eating grass, you may need to modify their behavior. This means trying to use negative reinforcement to train the cat not to eat the grass. Go outside with your cat and try to deter them from eating grass. For example, if the cat starts to eat grass, clap your hands loudly to scare the cat. You may also try shaking something loud, like a can full of pennies, to distract the cat from eating grass. Eventually, the cat will connect the unpleasant, startling sound with eating grass and stop eating it. Do not hit, yell, or scold the cat to keep them from eating grass. Sometimes your cat may eat grass to get missing nutrients. To help your cat with this problem, you can try changing their diet. Feed your pet a cat food that provides balanced nutrition to ensure they are getting the nutrition they need. The vet may may be able to run blood tests to check for any nutritional deficits. If your cat continues to eat grass and gets sick, then you may want to take them to the veterinarian. Grass may make your cat vomit often or have diarrhea. This can lead to health problems, so you want to get your cat checked out. Your cat may have a problem if they eat a lot of grass at once or eats it every day. Your vet will do a physical exam to check for any problems with your cat. If your vet suspects there is an underlying medical condition, they will perform tests to figure out if anything is causing the grass eating. For example, a cat with OCD may obsessively eat grass, which your vet can treat with medication.
Summary: Keep your cat in a grass-free area outside. Keep your cat indoors. Try to modify the behavior. Alter the cat's diet. Take your cat to the vet.

In one sentence, describe what the following article is about: intrusive or extrusive. Each of these types of rocks will have specific properties that will help you distinguish which type your igneous rock is. Magma is molten rock that flows beneath the earth's surface. Igneous rocks are formed by cooling magma. The location of the formation of the rock, as well as how fast the magma cools will determine the type of igneous rock. Intrusive rocks form from the cooling of magma deep beneath the earth's surface. Since this occurs below the earth's surface, the magma will cool very slowly. As magma cools, it will form crystals. Intrusive rocks have larger crystals typically formed together to form the rock mass. An example of an intrusive rock is granite. When magma is above the earth's crust, it is known as lava. Extrusive rocks form through very fast cooling of lava above the Earth's surface. Extrusive rocks have very small, almost microscopic crystals. These are often described as fine-grained rocks. You usually can't see these with the naked eye. The most common type of extrusive rock is basalt. There are 7 different texture classes for igneous rocks, each with their own unique features. Pegmatitic igneous rocks have very large crystals, more than 1 cm in size. These are the slowest cooling type of igneous rocks. Remember, the slower a rock cools, the larger the crystals will be. Phaneritic igneous rocks are composed of interlocking crystals that are smaller than crystals in pegmatitic but still visible with the naked eye. Porphyritic igneous rocks have crystals of two different sizes, often with large crystals set in areas of smaller crystals. Aphanitic igneous rocks have a fine-grained texture and most of their crystals are too small to see with the naked eye. You will need to use a magnifying glass to observe the crystals in aphanitic rocks. Igneous rocks that form too quickly for crystals to form have what is called a glassy texture. Obsidian is the only glassy igneous rock, and can be identified by its dark color. This looks like dark black glass. Vesicular igneous rocks, such as pumice, look bubbly and form before gases are able to escape as lava forms the rock. This also formed with very rapid cooling. Pyroclastic igneous rock is a texture composed of volcanic fragments ranging from very fine (ash) to very coarse (tuffs and breccias). Composition refers to the percentage of certain minerals in your rock. You will need a rock guide to determine what minerals are present in your rock. There are four main composition types for igneous rocks: Identifying the composition of your rock can be very difficult if you are not an experienced rock collector or geologist. If you have any questions about how to identify a rock, contact a collector or geologist at a local college or university. Felsic igneous rocks are light in color. Their mineral composition is primarily feldspars and silicates such as quartz. Granite is an example of a felsic rock. Felsic rocks have a low density and contain 0-15% mafic crystals. Mafic minerals are olivine, pyroxene, amphibole, and biotite. Mafic igneous rocks are dark in color and consist mainly of magnesium and iron. They contain 46-85% mafic mineral crystals and are high in density. Basalt is an example of a mafic rock. Ultramafic igneous rocks are also dark in color and contain higher amounts of the minerals found in mafic rocks. These rocks have greater than 85% mafic mineral crystals. Dunite is an example of an ultramafic rock. Intermediate igneous rocks contain 15-45% mafic mineral crystals. They share minerals with both felsic and mafic rocks and are intermediate in color. Diorite is an example of an intermediate rock.
Summary:
Classify igneous rocks into two main types: Identify the texture type of your rock. Look at the composition of your rock.