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Continental crust averages about 35 km thick. The earth's continental crust, on average, is 35 kilometers thick. |
Nitrogen oxide form(s) when nitrogen and oxygen combine at high temperatures. |
The long-lived isotopes require thousands of years to decay to a safe level in a nuclear reactor. |
Ionic compound atoms of various elements gain or lose electrons to produce ions. |
Sex-linked traits are located on genes on sex chromosomes. |
A "vector" can be defined as "an organism that carries pathogens from one host to another. An organism that carries pathogens from one individual to another is called a vector. |
The earth's rotation causes day and night. There are fewer than 24 hours of daylight in alaska during each day in april because earth鈥檚 rotation causes both day and night. |
Bases normally have a bitter taste. |
A voltaic cell uses what type of reaction to generate an electric current |
The nucleus is surrounded by a membrane and holds the genetic information for the cell. |
How hot is it on the surface of the Sun? |
The strong nuclear force binds together elementary particles known as quarks and gluons, which make up the protons and neutrons in the atomic nucleus, as well as less stable, more exotic forms of matter. Protons and neutrons are made of quarks, which are fundamental particles of matter. |
An electrical signal along a nerve cell triggers the secretion of neurotransmitter molecules. |
ozone A highly reactive molecule containing three oxygen atoms; Three oxygen ions make up an ozone molecule. |
Melanocytes are located in the bottom layer of the epidermis. |
Atmospheric tides result from the gravitational attraction of the sun and the moon on the earth's atmosphere, and like the oceanic tides, they rise and fall daily. Tides is the term for when the water of the ocean slowly rises and falls. |
Water takes the form of ice on planet mars. |
The number of what subatomic particles can vary between atoms of the same element? |
A scientific theory however, is a well-substantiated explanation of some aspect of the natural world based on a body of facts that have been repeatedly confirmed through observation and experiment. All scientific explanations and interpretations based on facts. |
Atomic orbitals are the places surrounding the nucleus of an atom where the electrons are most likely to be at any given time. The orbital is the area where an electron is most likely to be found. |
What is the term for a mixture that varies in its composition? |
Potential energy is the stored or pent-up energy of an object. Potential energy energy is stored in a person or object. |
The polymerase chain reaction is a way of making copies of what? |
The endoplasmic reticulum is the name of the organelle that helps make and transport proteins and lipids. |
Catabolic reactions involve breaking what? |
Which of the following best explains why many species of birds in New England fly south for the winter months? |
All organisms in a clade share common ancestry. A clade is one way of classifying organisms. |
A connection to the placenta is required for a newborn baby to begin breathing. |
What are ocean waves mainly caused by? |
Division of the Cytoplasm (Cytokinesis) A. The cytoplasm is divided during cytokinesis. |
Autotrophs are considered producers in a food chain. Autotrophs is another name for producers. |
The water cycle involves movement of water between air and land. |
What is responsible for the properties of metals? |
What type of compound contains atoms of two or more different elements in its ring structure? |
Core In solar astronomy, the innermost part of the Sun, where energy is generated by nuclear reactions. The innermost layer of the sun is known as the core. |
A scientific theory is a detailed explanation that is supported with physical evidence and experimental support. A theory is another name for a broad explanation that is supported by a great deal of evidence. |
Brain and eyes are the organs work together to allow us to see. |
What ancestors did caecillians evolve from? |
Often, this gas is a noble (or inert) gas (such as Neon, Argon, or Krypton, or a combination of noble gases). Neon is an example of noble gas. |
You see, the fungus is an excellent water absorber and it also can get a grip almost anywhere, but it lacks the ability to make its own organic food. Fungi are eukaryotic organisms that cannot make their own food and do not technically eat. |
It took centuries for man's knowledge of genetics to evolve to the point where there was a basic understanding of the role of the egg and the sperm and the inheritance of characteristics such as blue eyes and big ears. A human offspring inherit blue eyes. |
A lipid is one of a highly diverse group of compounds made up mostly of hydrocarbons. |
Close-up of a hydrogen atom, with one electron orbiting one proton. There are one electrons in the hydrogen atom. |
What results when the water vapor from a hot shower contacts the cooler surface of a mirror? |
The number of particles of a substance in a given volume is known as? |
Microclimates are pockets of differing climatic conditions usually created in areas such as near building walls and under trees. The climate of a small area is called a(n) microclimate. |
An orbital is the region of space where an electron is likely to be found. The orbital is the region called where an electron is most likely to be found. |
Meteorites, formed of split asteroids or planetary rocks, provide clues about our solar system. |
Catabolic and anabolic hormones in the body help regulate these? |
The number of particles of a substance in a given volume is known as the concentration. |
Volume is defined as the amount of space the mass or bulk of the artwork occupies, or the three-dimensional area of space that is enclosed by planes, edges, or wires. The term volume is used to describe the amount of space occupied by a sample of matter. |
Why is protein an important part of a healthy diet? |
What ensures that seeds germinate only when conditions for seedling survival are optimal? |
Starches are complex carbohydrates that are the polymers of glucose. |
Chemical elements and water are recycled through what cycle? |
What type of winds occur when air is forced over a mountain range? |
Bones are made up of tissues. |
What helps pumice float in water? |
Biochemical reactions take place inside the organisms' cells. |
Hagfishes have a skull made of what? |
Long amino acid chains make proteins, chains in the proper order and shape. Proteins are long chains of amino acids. |
Amino acids contain both a carboxylic acid group and a(n) amine group. |
Water molds mostly live in water or moist? |
The virus may induce the cell to forcefully undergo cell division, which may lead to transformation of the cell and, ultimately, cancer. All cells undergo cell division during a lifetime, but when this process is out of control, cancer results. |
A voltaic cell uses what type of reaction to generate an electric current |
Electromagnetism is magnetism produced by an electrical current. |
What physical property of matter reflects how closely packed the particles of matter are? |
Aqueous solution is used to describe a solution in which water is the solvent. |
Remote-control vehicles are able to go to the deepest ocean floor. |
What do we call the only light that people can see? |
The electromagnetic spectrum represents the full range of frequency of what type of wave? |
Like skeletal muscle, cardiac muscle is what? |
What are the ice crystals that form on the ground called? |
Exemplified by canada and alaska, what kind of climate has cool, short summers and long, cold winters, little precipitation, and abundant conifers? |
Secondary consumers (which eat primary consumers) are considered to be trophic level 3. |
A(n) chemical bond is a force of attraction between ions and atoms. |
What type of pollutants enter the air directly? |
What is the most common type of cancer developed in children? |
Transparent matter transmits light without scattering it. |
The light reactions take place in which membranes? |
Where does groundwater primarily come from? |
Lipids play several important roles in the human body. |
How do you determine the atomic weight of an element? |
What type of microscope is used to see extremely small objects? |
What does an underwater spider use to breathe and keep alive? |
How do scientists know that some mountains were once at the bottom of an ocean? |
Chinook winds occur when air is forced over a mountain range. |
Geiger counter Electronic instrument for detecting and measuring radiation and radioactive substances. The 'counting' instrument geiger counter is used to measure radioactivity. |
The octet rule is a result of trends in energies and is useful in explaining why atoms form the ions that they do. |
Tell emotion just by facial expression Human facial expressions can communicate emotions. |
But decay rates are fixed, resulting in a characteristic, unchanging half-life for each isotope that is the time needed for one-half of the isotope to decay. The term half-life decribes the amount of time required for half of the original material to decay in an isotope. |
Reptiles developed the first amniote egg 18. The amniotic egg first evolved in reptiles. |
Alternating currents reverse their direction at regular intervals. Alternating current is the term for electric current that keeps reversing direction. |
Low energy causes waves to bring sand up onto the beach during summers. |
The iconic gray mantle of the human brain, which appears to make up most of the mass of the brain, is called? |
Which rule is a result of trends in energies and is useful in explaining why atoms form the ions that they do? |
What type of function does the long bone perform? |
Microscopes were first developed in the early 1600s by eyeglass makers. |
Why are most fossils found in sedimentary rocks? |
The fetal period lasts approximately 30 weeks weeks. |