Flash Cards

Science 1st 9 wk ch.1 and measurement (Haggard/7th gr)

Question Answer
Technology how people change the world around them to meet their needs and solve practical problems
Observing using one or more of your senses to gather information
Classifying the process of grouping together items that are alike in some way
Inferring when you explain or interpret things you observe
Predicting making a forecast of what will happen in the future based on past experience or evidence
Qualitative Observations observations that deal with descriptions that cannot be expressed in numbers
Quantitative Observations observations that deal with a number or amount
Making Models creating representations of complex objects or processes
Biologist a scientist who studies living things
Engineer a person who is trained to use both technological and scientific knowledge to solve practical problems
Life Science same as biology – the study of living things
Controlled Experiment an experiment in which only one variable is manipulated at a time
Variable factor that can change in an experiment
Manipulated Variable same as indipendent variable – the one variable that is pruposely changed to test a hypothesis
Responding Variable same a dependent variable – the factor that may change in response to the manipulated variable
Hypothesis a possible explanation for a set of observations or answer to a scientific question
Explain the difference between science and technology. Science is the study of the natural world, while technology changes the natural world to meet human needs.
How are science and technology related? Technology requires the application of scientific knowledge. In turn technology may be used by scientists in their research. Advances in technology contribute to advances in science, and advances in science contribute to advances in technology.
Thinking and questioning is the start of what process? the process of scientific inquiry
Name some ways scientists can communicate their results. They can give talks at scientific meetings, exchange information on the Internet, and publish articles in scientific journals.
Name some safety precautions for field investigations. Be prepared, use common sense, and never go alone.
What is the goal of technology? to improve the way people live
How can technology have both positive and negative consequences on society? (Give an example.) PESTICIDES — Positive: greater food production, feed more people — Negative: can be washed into water supplies (rivers and streams) by rain, harmful to people if food containing pesticides is eaten
What is an endoscope? an instrument for viewing internal organs
Explain how this invention represents the relationship between science and technology. Scientists explained how light travels through substances, and technologists were able to use this knowledge to design optical fibers and endoscopes.
Mass the total amount of matter in any object
Weight the measurement of the force of gravity on an object
Volume the amount of space that matter occupies
Density the mass of a certain volume of a material or mass per unit volume (how much mass is contained in a given volume) (D=m/v)
Triple Beam Balance used to measure mass
What is the SI unit of length? the meter
What is the SI unit of volume? the liter
How do we measure the volume of a rectangular solid? length x width x height
What is the density of water? 1 gram per cm cubed, or 1 g/mL
Be able to calculate metric conversions. You need to know the metric staircase. 3 km = 3,000 m
2 m = 2,000 mm
3,000 mg = .03 hg
165 cg = .00165 kg
Be able to calculate density. D= M/V

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