Because it is often difficult to gather numerical data, _____ information is collected

Scientists need to make sure they are not _____ to keep from influencing observations, experimentation, and analysis

A scientific explanation of why something happens in the nature based on known facts arrived at through repeated testing over time is a(n) _____

the factor in an experiment that is controlled or changed by the experimenter is calle the

_____ research is usually based on numerical measurements

an experiment in which only one variable is changed is a(n) _____ experiment

a _____ states what happens in the natural world, but does not tell you why it happens

the _____ supports or rejects the hypothesis

the group in an experiment used as a standard for comparison is known as the

a well known physicist admitted to falsifying data to make the evidence of the behavior he observed "more convincing." He also made extensive errors in transcribing and analyzing his data, thus violating the principles of honesty and carefulness. This is an example of a person going against his/her _____

A testable explanation or anser to a question or problem is a(n) _____

once a problem is identified _____ are often made using your five senses to help solve the problem

quantitative research is often reported as _____ to aid understanding

Students of a biology class ran an experiment on a type of flowering plant. Their goal was to find the optimal time in the plant's life for flowering. What tiem period will provide the most flowering plants?

A scientist discovers an important breakthrough in cancer treatment. the scientist thnks the information could save thousands of lives and immediately announces the results on national television, skipping peer review. How might other scientists react to this news?

light bulbs and the electrical systems that run them are examples of _____

_____ is the study of the structure and behavior of the physical and natural world through observation and experiment

sugar dissolves in, or mixes completely with, water. the solubility of a substance in water is determined by measuring the maximum amount of the substance that dissolves in water at a given temperature. identify the independent and dependent variables

rasing the average temperature of the earth's atmosphere will cause the polar ice caps to reduce in size. _____ is the independent variable and _____ is the dependent variable

smithers thinks that a special juice will increase the productivity of workers. he creates two groups of 50 workers eacha nd assigns each group the same task (in this case, they're supposed to staple a set of papers). group a is given the special juice to drink while they work. group b is not given the special juice. after an hour, smithers counts how many stacks of papers each group has made. group a made 1587 stacks and groub b made 2113 stacks. what is the control group? what is the independent variable? what should smither's conclusion be?

determine which characteristic of life is being described; a cat has a litter of kittens

determine which characteristic of life is being described; reason why humans shiver then they get cold

determine which characteristic of life is being described; reason why your legs and arms grow longer and stronger as you get older

determine which characteristic of life is being described; a change in behavior and structure over a long period of time is reffered to as _____

determine which characteristic of life is being described; in all of our cells there is DNA

determine which characteristic of life is being described; before a soccer game Charlie always eats a big dinner

determine which characteristic of life is being described; Tissues work together to form an organ which works with other organs to form an organ system

determine which characteristic of life is being described; camels have long, thick eyelashes that work to protect their eyes from sand since they live in sandy environmental conditions

state whether the following example is a stimulus or response; the dismissal bell rings for your class and you pack up your belongings. packing up your belongings is a _____

state whether the following example is a stimulus or response; covering your ears

state whether the following example is a stimulus or response; taking a test

state whether the following example is a stimulus or response; hearing an embarrassing comment

state whether the following example is a stimulus or response; a plant grows toward the direction of sunlight

the nucleus of an atom contains _____

atoms of two or more elements chemically combined in a fixed amount are _____

a very strong base might have a pH of 13 due to producing many _____

within an atom there are positively charged particles called

a _____ is formed when two or more substances are physically combined, but not chemically combined

sugar is considered a _____ because it can dissolve in water while is considered a _____ because it is dissolving the sugar

an atom contains particles that are negatively charged called _____

a mixture in which one substance settles (does not dissolve) because it is either too dense or thereis too much of it is refferred to as ____

The particles in an atom that have no charge are known as _____

differnt isotopes of the same element have _____

A covalent bond if formed as the result of

vinegar, gasoline and tea are exampels of mixtures that are evenly blended throughout. these types of mixtures are known as _____

in order for atoms to become stable most must have an outer energy level filled with _____ electrons

A _____ is a pure substance in which there is only one kind of atom

Which property of water causes the curved surface shown in the picture?

the weak bond that forms between water molecules is known as a _____ bond

in a water molecule, shared electrons spend more time around the oxygen atom than the hydrogen atoms. as a result the oxygen atom is

of the three subatomic particles, _____ are most involved in chemical reactions and bonds

a chemical bond formed by the transfer of electrons is a(n) _____ bond

the pH scale is a measurement system that indicates the concentration of _____ in a solution

electrons located on the outermost energy level of an atom are called _____ electrons

when water molecules attract to each other it is known as _____ which creates _____ causing the water to bead up

particles in an atom responsible for the atoms identity are called _____

_____ are important to an atom because they hold the neucleus together

made up of interacting population in a certain area at the same time

something that possesses all the characteristics of life

made up of all the interacting population in an area at a given time and its abiotic factors

a group of the same species that live in the same area at the same time

the portion of Earth that supports all living things, high in the atomosphere to deep in the ocean

the study of interactions among organisms and between organisms and their physical surroundings

organisms that mostly eat animals

organisms that eat a variety of food including plants and animals

birds, lions, zebras, giraffes; living things in the environment

organism that mostly eat plants

organisms that eat the bodies of dead organisms

wind, temperature, hurricanes, altitude; nonliving things in the environment

response of an ecosystem to too much nitrogen and phosphorus causing changes in animal and plant populations due to degradation of water and habitat quality

organisms that have the ability to convert light or chemical energy into a usable form of energy are known as _____ while organisms that must obtain their energy from other organisms are known as

durring the process of _____ bacteria convert nitrogen into gas into usable organic compounds while during the process of _____ the bacteria convert nitrates (NO3) back to nitrogen gas

what is the term for each step in the transfer of energy and matter within a food web?

evaporation, condensation, and precipitation are part of the ____

decomposers are able to convert ammonia (NH3) from dead plants and animals and their waste products into ammonium nitrites (NH4) during _____

organisms use phosphorus to make _____

since the main source of phosphorus are _____ it is considered a _____ because it less available for the growth and productivity of organisms

in an ecological pyramid, the biomass and the number of organisms _____ with higher level

plants take in water and carbon through _____ while they realease water through ___

heterotrophs take in carbon, nitrogen, and phosphorus directly or indirectly by _____

organisms use nitrogen to make _____

what happens ot the amount of energy in a food chain each time it is transferred from one organism to the next

what happens to most of the energy transferred between organisms?

the range of physical and biological conditions in which an organism lives and the way it obtains what it needs to survive and reproduce is known as _____

the warm, oxygen-rich, circulating layer of a pond or lake is reffered to as the _____

the cold, deep, non-circulating layer of a pond or lake with little or no oxygen is called the _____

an area where a freshwater stream or river merges with the saltwater of the ocean is known as

ticks nest in the deer and dig into their skin, drinking their blood. They can also cary a disease called Lyme's disease, possibly infecting the wound formed on the deer. what type of relationship exists between these two species?

the ostrich always moves with the herd of zebras since it has a poor sense of hearing and smell, whereas the zebra has very sharp senses. the ostrich has a keen sense of sight, which the zebra lacks. hence, they warn one another of any nearby lurking dangers. what kind of relationship exists between these two species?

an american robin builds its nest in a red maple tree. the robin is able to receive shelter from certain weather conditions and protection from other organisms that may prey upon it. the bird and its nest do not penetrate the tree's bark or take nutrients from its sap. what type of relationship exists between these two species?

an orb spider has a gland that creates protein often called dope. organs at the end of the glands spin to turn the dope into silk so a web can be created. the web helps the spider incase their prey and eggs such as insects. what type of relationship exists between these two species?