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Sound is a type of energy that requires waves traveling through matter. Sound energy travels through matter in wave form.
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.
The opening in the front of the eye is called pupil.
If a unit is named after a person it needs to be?
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.
A metallic bond is the force of attraction between a positive metal ion and valence electrons.
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 .
The vast majority of what phenomena occurs along one of three types of plate boundaries?
What phenomenon is crowding out other species and making all the other causes of extinction worse?
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.
What aspect of beryllium allows it to absorb x-rays?
Solvent A liquid that dissolves another substance (or substances) to form a solution . A solution forms when a solute dissolves in a solvent.
What causes a blue block to appear blue in the sunlight?
You see a faster reaction rate when the concentration of reactants is higher.
Which of these describes water in a solid state?
Sunspot activity follows an 11-year cycle. Sunspots occur in a 11 year cycle.
Vesicles are used during endocytosis to allow molecules to enter the cell.
Which two processes in the water cycle are primarily responsible for the creation of a lake?
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.
The action of flushing the toilet, performed multiple times daily, is the single biggest use of water in the home.
Antarctica is the only continent without amphibians.
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
An excess of fertilizers and other nutrients causes eutrophication to occur.
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.
Gases have the lowest density.
Applying a pressure greater than the osmotic pressure of a solution will do what?
What is the main difference between eukaryotic and prokaryotic cells?
Forms of energy: motion, heat, light, sound. Heat, light, and sound are all different forms of energy.
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.
Why does metal conduct heat and electricity so well?
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.
Carnivore An animal that eats other animals. You call an animal that feeds on other animals a(n) carnivore.
Two high and two low tides occur daily; Two low and high tides occur per day.
The orbital is the area where an electron is most likely to be found.
What physical property of matter reflects how closely packed the particles of matter are?
At what time of life does menopause occur?
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.
<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.
What physical property of matter reflects how closely packed the particles of matter are?
Although it is the easiest to observe, color is not ideal as a sole way to identify minerals.
Human evolution shows that evolutionary changes typically occur at a slow pace.
The ability of matter to combine chemically with other substances is known as reactivity.
It takes earth one week to rotate on its axis seven times.
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.
What determines whether a volcanic eruption will be explosive or not?
How does carbon dioxide chemically weather rocks?
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.
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.
Two is the minimum number of times a partial lunar eclipse will occur each year.
A light bulb converts electrical energy to light and what?
What do we call an incorrect test result that should have been positive?
The long-lived isotopes require thousands of years to decay to a safe level in a nuclear reactor.
Normally human cells have 23 pairs (46) chromosomes Diploid - cell with a complete number of pairs of chromosomes b. Sperm cells &amp; 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.
A electron microscope is used to see extremely small objects.
What are formed by atoms gaining electrons?
A mold is an imprint of an organism left in rock.
What makes the earth habitable for humans?
Approximately how many weeks does the fetal period last?
To confirm the work of another scientist, a scientist might replicate their work.
Striated or striped muscle can be further divided into skeletal muscle and cardiac (heart) muscle. Like skeletal muscle, cardiac muscle is striated.
What causes a blue block to appear blue in the sunlight?
Hormones send signals through your body.
Gases have no definite shape or volume. The gas form of matter has neither a definite shape nor a definite volume.
Bases normally have a bitter taste.
Which animal is preparing for a seasonal change in the environment?
You call the high and low points of transverse waves crests and troughs.
The energy transformations that occur when a candle burns is described by: chemical energy from the wax is converted into light and heat energy.
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.
By how many weeks do all major organs start developing?
The sporophyte stage is the dominant stage of the lifecycle of a fern.
Gravity causes rocks to roll downhill.
The small intestine begins in the stomach.
Simple carbohydrates can be classified in terms of chain length.
The amount of food available in the area best determines the number of wolves that can live in an area.
The cells of all protists have a nucleus.
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.
Where do streams often start?
Which type of energy does a person use to pedal a bicycle?
How do the spines of a cactus help it survive?
What branch of science is based on the modern atomic theory, which states that all matter is composed of atoms?
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.
A theory is another name for a broad explanation that is supported by a great deal of evidence.
Exposure to what can increase the amount of pigment in the skin and make it appear darker?
Which two processes in the water cycle are primarily responsible for the creation of a lake?
Alkenes with the same atoms but different shapes are called isomers.
Digestion begins in the mouth with the teeth, which grind the food into small particles; Digestion begins in the mouth.
Air can be separated into several elements.
How many types of antigens can an antibody match?
Hydrocarbons compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization.
What word do get from the arabic al-qili, meaning “ashes of the saltwort plant from salt marshes”?
The option to remove kidney stones other than surgery is ultrasound treatments.
Which state of matter has the lowest density?
The spines of a cactus help it survive because spines protect the cactus from animals.
The amniotic sac, which was sitting on top of the flat embryo, envelops the embryo as it folds.
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.
How is sediment transported?
In a pedigree chart the squares shape symbolizes males.
What happens to the volume of a balloon when you add moles of gas to it by blowing up?
Animals can transport what waste material in the circulatory system and store it safely at high concentrations?
Pillow lavas can also form when flows enter a river or lake. Lava that enters the water is called pillow lava.