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Science Unit 1 Test
Terms in this set (24)
What are the features of life? (there are 8)
all living things.....
are made of cells, use energy, respond, reproduce, grow and develop, adapt, and have a life span (also can move but is kind of optional)
What features are shared by all living things and some other non-living things?
moves, uses energy, and grows
What is a cell?
it is the smallest living unit that can carry out life process
Which features are unique to living things?
made of cells (KEY), respond, reproduce, develop, adapt, and have a life span
What is the main source of energy?
the sun, from which plants can produce food (some bacteria can't access sunlight and do not need oxygen)
What do living things respond to?
immediate and long term changes in their environment, also respond to stimuli
What is a stimulus?
anything that causes some change in an organism
What is a response?
the reaction to a stimulus
What is homeostasis?
an organism's ability to keep the proper conditions inside, no matter what is going on outside it
What is the difference between living things growing and developing?
-growth is when a living things increases in cells/size
-development is the changes that take place during the life of an organism
What happens when living things adapt?
living things must adapt to environment or there is a risk of species to become extinct, adaption occurs over multiple generations, and it increases chance of survival
Do all living things need "a place to live"?
Yes, but the environment limits where organisms can live, and all organisms need living space in their surroundings.
What are some raw materials that are essential of living things?
-proteins, fats, sugars (all living things are made of)
-but when living things die the substances are broken down and released into soil or air
What are the steps of the scientific method? (there are 8)
state the problem, gather info, form hypothesis, test hypothesis with experiment, use controls, analyze data, draw conclusions, report results
What is a hypothesis? Example?
-hypothesis is possible explanation to the problem based on previous knowledge and is always in if....then
What is an independent variable? Example?
-can be often changed, is what you are testing
What is a dependent variable? Example?
-is what will you measure to see the response to the independent variable
What is a constant? Example?
-things kept the same and if they were changed they could alter the outcome
What is a control group? Example?
-it is a standard to which the outcome of the test is compared
How many mL are in a cm cubed?
they are the same unit, basically
How many mL or cm cubed are in a L?
How many deci-, centi-, and milli-, are in a meter, gram, or liter?
10, 100, and 1000
How many meters, grams, or liters, are in a deka-, hecto-, or kilo-?
10, 100, and 1000
When should you use a bar graph and a line graph?
a line graph is mainly used if the dependent and independent variables are both numbers (like time) while a bar graph is if the dependent variable is not
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