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Biology Exam
| Question | Answer |
|---|---|
| Science is best described as a | way of knowing |
| the work of scientists usually begins with | careful observations |
| a scientific hypothesis | be tested by experiments or observations |
| During a controlled experiment, a scientist isolates and tests | a single variable |
| How does peer sharing ideas through peer-reviewed articles help advance science? | scientists reading the articles may come up with new questions to study |
| the process by which organisms keep everything inside their bodies within certain limits is called | Homeostasis |
| The basic unit of length in the metric system is the | meter |
| the three particles that make up atoms are | protons, neutrons and electrons |
| isotopes are atoms of the same element within the same number of protons and a different number of | Neutrons |
| what makes up a molecule of water? | two atoms of hydrogen and one atom of oxygen |
| a covalent bond is formed as the result of | sharing electrons |
| in a water molecule, shared electrons spend more time around the oxygen atom than the hydrogen atoms. As a result, the oxygen is | slightly negative |
| when salt dissolves in water, water is the | solvent |
| If the pH of stomach acid and of oven cleaner were measured | The pH of stomach acid would be below 7, but the pH of oven cleaner would be above 7 |
| the energy needed to get a reaction started is the | activation energy |
| enzymes affect the reactions in living cells by changing the | speed of the reaction |
| the branch of biology dealing with interactions among organisms and between their environment is called | ecology |
| The simplest grouping of more than one kind of organisms in the the biosphere is | a community |
| plants are | primary producers |
| in what way are herbivores and carnivores alike? | they both obtain energy by consuming other organisms |
| a model of the complex feeding interactions among organisms in a community from producers to decomposers is called a | food web |
| What animals eat both producers and consumers | omnivores |
| what are the three kinds of ecological pyramids | energy, biomass, and numbers |
| the repeated movement of water between earth's surface and the atmosphere is called | the water cycle |
| organisms need nutrients in order to | carry out essential life functions |
| because of biogeochemical cycling | nutrients are not limited by any one nutrient |
| what is at the base of all ecological pyramids? | producers |
| T/F the bird has brown spots on it's wings is an example of an inference | False, Observation |
| T/F most plants and animals reproduce asexually | False, Sexually |
| T/F a substances made up of only one kind of atom is an element | True |
| T/F a substance with equal numbers of H+ and OH- ions is a basic solution | False, Neutral |
| T/F animals that feed on plants are called producers | False, Consumers |
| T/F in an ecological pyramid the biomass of living things increase at each higher level | False, Decreases |
| inside all living things, chemical reactions happen that allow the organisms to grow and develop. Organisms need to take in _______ to fuel these reactions ` | energy |
| Every living thing is made up of a set of body parts . Each body part or structure has a certain job or ____ | functions |
| Of the three subatomic particles ____ are most involved in forming chemical bonds | electrons |
| Waters_____ allows it to dissolve compounds such as table salt | Polarity |
| The Stomach produces a _____ that lowers pH and helps digest food | Acid |
Created by:
vmfrance18
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