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Practice of Science
Practice of Science 2
Water Properties
Macromolecules
Chemical Reactions
100
A possible answer to a question that can be tested by an experiment
What is a hypothesis?
100
Robert Hooke was the first to describe cells in plants. What invention allowed Hooke and later scientists to develop the cell theory?
What is light microscope?
100
Water consists of two hydrogen atoms and one oxygen atom bonded together. The bond is
What is a covalent bond?
100
The most important element in macromolecules is
What is carbon?
100
A process that changes, or transforms, one set of chemicals into another is
What is a chemical reaction?
200
During an experiment, each plant group is given a different type of fertilizer. The fertilizer is the
What is independent variable or manipulated variable?
200
The units liter, milliliter, and cubic centimeter are all used to measure
What is volume?
200
What property of water makes water molecules attracted to each other, or 'stick together?’
What is cohesion?
200
What is the only macromolecule that we don't put into our body (it is already there)?
What is nucleic acid?
200
What is the energy needed to start a chemical reaction?
What is activation energy?
300
When leaving a movie theater, a person notices that the sidewalk is now wet. If the person assumes it rained during the movie, the person is making
What is inference?
300
In an experiment there are five groups, Group A is given 1/2 oz of water a day and 2 hours of sunlight. Groups B- E are given all the same as A except they are also given various amounts of plant food. Group A represents
What is control group?
300
What property of water allows bugs to 'walk on water?'
What is surface tension?
300
Macromolecules are formed by the process known as polymerization in which large compounds are built by joining smaller units called
What are monomers?
300
A protein in your body that acts like a catalyst to speed up chemical reactions by lowering the activation energy.
What is an enzyme?
400
A scientist is testing the effieciency of various microwaves by measuring the temperature of water after being heated at high power for one minute. The temperature measured in this test is an example of what type of data collection
What is quantitative data?
400
What safety equipment should you wear during a laboratory experiment that involves the use of corrosive chemicals?
What are safety goggles, aprons, and gloves?
400
How is the heat capacity of water important to the environment?
What is Water takes a large amount of heat to raise the temperature. This is important for the organisms that live in bodies of water, because they are sensitive to extreme temperature changes.
400
Compare and contrast a saturated and unsaturated fatty acid.
What is Similar: fats with C, H, and O; Different: Saturated- all single bonds, solid; Unsaturated- at least one double bond, liquid
400
The chemical reaction that is more likely to occur spontaneously is
What are energy producing or releasing reactions?
500
Name the parts of the scientific method in the correct order
What is ask a question, research, form a hypothesis, test the hypothesis, analyze the data, draw conclusions, and communicate the results.
500
A __________well tested explanation for a range of observations and hypothesis and a _____________ is a summary of an observed natural event.
What are scientific theory and scientific law?
500
Capillary action is the sum of what forces.
What is adhesion, cohesion, and surface tension
500
Name one function for each group of macromolecules.
What is carbohydrates make energy, lipids store energy, nucleic acids store and transmit genetic information, and proteins control the rate of reactions and regulate cell processes.
500
Enzymes play essential roles in controlling chemical pathways, making materials that cells need, releasing energy, and transferring information. They are catalysts for reactions, enzymes can be affected by different variables that influence a chemical reactions. These variables that can affect the activity of an enzyme are
What are temperature, pH, and regulatory molecules?