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Sound is a type of energy that requires waves traveling through matter. Sound energy travels through matter in wave form.
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Migraines are thought to be caused by extreme constriction and then dilation of blood vessels in the head. When blood vessels in the head dilate, a migraine, a severe headache, can occur.
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The opening in the front of the eye is called pupil.
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If a unit is named after a person it needs to be?
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The silver spines on cholla cactus help reflect sunlight away from the cactus s trunk so predators will not see the trunk, and they also keep the cholla cool. The spines of a cactus help it survive because spines protect the cactus from animals.
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A metallic bond is the force of attraction between a positive metal ion and valence electrons.
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The impulse experienced by an object is always equal to the change in its momentum. Change in momentum in an object is equivalent to impulse .
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The vast majority of what phenomena occurs along one of three types of plate boundaries?
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What phenomenon is crowding out other species and making all the other causes of extinction worse?
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Carnivores that eat herbivores occupy the third trophic level and are called secondary consumers. Secondary consumers (which eat primary consumers) are considered to be trophic level 3.
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What aspect of beryllium allows it to absorb x-rays?
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Solvent A liquid that dissolves another substance (or substances) to form a solution . A solution forms when a solute dissolves in a solvent.
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What causes a blue block to appear blue in the sunlight?
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You see a faster reaction rate when the concentration of reactants is higher.
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Which of these describes water in a solid state?
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Sunspot activity follows an 11-year cycle. Sunspots occur in a 11 year cycle.
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Vesicles are used during endocytosis to allow molecules to enter the cell.
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Which two processes in the water cycle are primarily responsible for the creation of a lake?
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In 2012, the group began campaigning against the practice of hydraulic fracturing (fracking) by Chesapeake Energy and other oil and gas drilling companies. Fracking is another term for hydraulic fracturing.
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The action of flushing the toilet, performed multiple times daily, is the single biggest use of water in the home.
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Antarctica is the only continent without amphibians.
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Distribution Water on earth is located primarily in the oceans (97.2%), polar caps (2.14%), ground water(0.61%), and surface water(0.009%). Most of earth's water is located in oceans
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An excess of fertilizers and other nutrients causes eutrophication to occur.
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Because soil takes thousands of years to develop, conservation of soils is critical. Soil is a renewable resource that can take thousand of years to form.
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Gases have the lowest density.
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Applying a pressure greater than the osmotic pressure of a solution will do what?
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What is the main difference between eukaryotic and prokaryotic cells?
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Forms of energy: motion, heat, light, sound. Heat, light, and sound are all different forms of energy.
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The earth itself is constantly moving, rotating around the sun once a year, and rotating on its own axis once a day. Earth rotates on its axis once times in one day.
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Why does metal conduct heat and electricity so well?
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A disease vector is an agent that transfers a pathogen from one organism to another (e.g., an insect). An organism that carries pathogens from one individual to another is called a vector.
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Carnivore An animal that eats other animals. You call an animal that feeds on other animals a(n) carnivore.
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Two high and two low tides occur daily; Two low and high tides occur per day.
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The orbital is the area where an electron is most likely to be found.
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What physical property of matter reflects how closely packed the particles of matter are?
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At what time of life does menopause occur?
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The intensity of sound is measured in decibels (reflects differences in sound energy). Decibel is the term used to measure the intensity of sound waves.
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<br />A balance is a kind of scale which compares the masses of two objects, usually one with a known mass (the standard) and one with an unknown mass. A student should use a balance to compare the masses of two small rocks.
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What physical property of matter reflects how closely packed the particles of matter are?
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Although it is the easiest to observe, color is not ideal as a sole way to identify minerals.
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Human evolution shows that evolutionary changes typically occur at a slow pace.
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The ability of matter to combine chemically with other substances is known as reactivity.
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It takes earth one week to rotate on its axis seven times.
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The centripetal acceleration is caused by a centripetal force that directs to the center of the object. Centripetal force is the force that causes centripetal acceleration.
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What determines whether a volcanic eruption will be explosive or not?
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How does carbon dioxide chemically weather rocks?
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Amphibians are cold-blooded (ectothermic) vertebrates that cannot maintain body temperature through their internal physiological procedures. Ectothermic vertebrates control body temperature to just a limited extent from the outside by changing behavior.
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Transpiration is the process of giving off vapor through the pore of the skin or the stomata of plant tissues, while evaporation is the process of changing liquid water to a vapor. Evaporation is responsible for changing liquid water into water vapor.
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Two is the minimum number of times a partial lunar eclipse will occur each year.
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A light bulb converts electrical energy to light and what?
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What do we call an incorrect test result that should have been positive?
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The long-lived isotopes require thousands of years to decay to a safe level in a nuclear reactor.
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Normally human cells have 23 pairs (46) chromosomes Diploid - cell with a complete number of pairs of chromosomes b. Sperm cells & egg cells only have 23 chromosomes Haploid - only one of its pairs of chromosomes 3. A normal human liver cell has 23 pairs of chromosomes.
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A electron microscope is used to see extremely small objects.
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What are formed by atoms gaining electrons?
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A mold is an imprint of an organism left in rock.
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What makes the earth habitable for humans?
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Approximately how many weeks does the fetal period last?
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To confirm the work of another scientist, a scientist might replicate their work.
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Striated or striped muscle can be further divided into skeletal muscle and cardiac (heart) muscle. Like skeletal muscle, cardiac muscle is striated.
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What causes a blue block to appear blue in the sunlight?
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Hormones send signals through your body.
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Gases have no definite shape or volume. The gas form of matter has neither a definite shape nor a definite volume.
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Bases normally have a bitter taste.
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Which animal is preparing for a seasonal change in the environment?
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You call the high and low points of transverse waves crests and troughs.
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The energy transformations that occur when a candle burns is described by: chemical energy from the wax is converted into light and heat energy.
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Amphibians are cold-blooded (ectothermic) vertebrates that cannot maintain body temperature through their internal physiological procedures. Ectothermic is the term for animals that cannot raise their body temperature on their own.
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By how many weeks do all major organs start developing?
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The sporophyte stage is the dominant stage of the lifecycle of a fern.
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Gravity causes rocks to roll downhill.
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The small intestine begins in the stomach.
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Simple carbohydrates can be classified in terms of chain length.
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The amount of food available in the area best determines the number of wolves that can live in an area.
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The cells of all protists have a nucleus.
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Elements and Atoms An element is a pure substance that cannot be decomposed by any chemical change. You call a pure substance that cannot be broken down into different types of substances a(n) element.
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Where do streams often start?
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Which type of energy does a person use to pedal a bicycle?
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How do the spines of a cactus help it survive?
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What branch of science is based on the modern atomic theory, which states that all matter is composed of atoms?
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the water vapor condenses to form clouds, which are millions of tiny drops of water; Clouds form(s) when water vapor condenses in the air around specs of matter.
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A theory is another name for a broad explanation that is supported by a great deal of evidence.
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Exposure to what can increase the amount of pigment in the skin and make it appear darker?
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Which two processes in the water cycle are primarily responsible for the creation of a lake?
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Alkenes with the same atoms but different shapes are called isomers.
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Digestion begins in the mouth with the teeth, which grind the food into small particles; Digestion begins in the mouth.
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Air can be separated into several elements.
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How many types of antigens can an antibody match?
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Hydrocarbons compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization.
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What word do get from the arabic al-qili, meaning “ashes of the saltwort plant from salt marshes”?
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The option to remove kidney stones other than surgery is ultrasound treatments.
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Which state of matter has the lowest density?
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The spines of a cactus help it survive because spines protect the cactus from animals.
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The amniotic sac, which was sitting on top of the flat embryo, envelops the embryo as it folds.
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Shale oil, in fossil fuel production, either a synthetic crude oil that is extracted from oil shale by means of pyrolysis or a naturally occurring crude oil that is extracted from underground shale deposits by means of fracking (hydraulic fracturing). Fracking is another term for hydraulic fracturing.
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How is sediment transported?
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In a pedigree chart the squares shape symbolizes males.
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What happens to the volume of a balloon when you add moles of gas to it by blowing up?
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Animals can transport what waste material in the circulatory system and store it safely at high concentrations?
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Pillow lavas can also form when flows enter a river or lake. Lava that enters the water is called pillow lava.
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