Science Basics
This is an objective awareness that describes something that can be detected with your senses.
What is an observation?
This is the overall goal of a scientific investigation.
What is answering a question?
Technology is the application of scientific discoveries to meet these.
What are human needs and goals?
Anything that has mass and occupies space is called this.
What is matter?
These are the four major types of macromolecules: carbohydrates, lipids, proteins, and ________.
What are nucleic acids?
An observation such as “the liquid is green” is this type of observation
What is a qualitative observation?
In an experiment, this is the variable the experimenter deliberately changes or manipulates.
What is the independent variable?
This field applies scientific and mathematical principles to solve problems.
What is engineering?
This is the smallest part of an element that still has the properties of that element.
What is an atom?
These are the basic subunits that are joined together to make many macromolecules.
What are monomers?
An observation such as “the liquid is 100 mL” is this type of observation.
What is a quantitative observation?
In an experiment, this variable changes in response to the independent variable and is usually what the scientist measures
What is the dependent variable?
The first step of technological design is to clearly define this
What is the problem or need?
Water is made from two atoms of this element covalently bonded to one atom of oxygen.
What is hydrogen?
Glucose, galactose, and fructose are examples of this type of carbohydrate.
What are monosaccharides?
If repeated experiments consistently produce measurements that are close to one another, the measurements have this quality.
What is precision?/precise?
This group is used for comparison with the experimental groups and represents the “normal” condition.
What is the control group?
During the design process, engineers brainstorm, ________, sketch, and narrow down their ideas to the best design.
What is research?
Water molecules stick to other water molecules through this attraction. This property contributes to water’s surface tension.
What is cohesion?
This macromolecule has amino acids as its monomers, and its shape determines its function.
What is a protein?
A scientist develops an explanation that organizes facts and research to explain why an observed phenomenon occurs. This is different from a law because it explains the “why,” rather than primarily describing “how.”
What is a scientific theory?
A scientist tests whether a certain drink affects how quickly runners finish a race. The runners are kept the same age, gender, breakfast, training, and shoes. State a hypothesis for this investigation.
If (IV), then (DV) (Teacher approval)
Engineers rarely create a perfect design on the first attempt. Instead, they repeatedly do these two things to improve the product or process.
What are test and redesign?
Ice floats on liquid water because solid water is ________ ________ than liquid water. This property allows organisms to survive in water beneath frozen surfaces.
What is less? dense?
A molecule has a hydrophilic phosphate-containing head and hydrophobic fatty-acid tails. Two layers of these molecules form the structure that makes up the cell membrane.
What is a phospholipid?