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fall final science 2019
Terms in this set (36)
What is the difference between an Independent Variable and a Dependent variable?
An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in an experiment.
What are the controls (variables/parameters) in an experiment?
A control is an experiment or observation designed to minimize the effects of variables other than the independent variable.
If I was going to grow daisies and see if they would grow taller if I give them Orange Juice instead of water, what would be the independent variable, what would be the dependent variable, and what would be some controls?
Everything except the water and OJ is kept the same for both plants (sunlight, soil, temperature, amount of OJ or water given). These would be the controls. the independent variables would be the water and the OJ. The dependent variables will be how tall each plant grows depending on whether they have been given water or OJ.
In this graph which label represents the dependent variable? What represents the independent variable? Which area of the graph is the cause? Which area of the graph is the effect?
The dependent variable is the bounce height on the y-axis and the independent variable is the drop height on the x-axis. The cause is the ball drop along the x-axis, and the effect is the bounce along the y-axis.
How do molecules behave differently when in a solid, liquid, or gas state? Paste pictures in addition to descriptions
In a solid, the molecules are packed together do not move around very much. In a liquid, the molecules are in contact but easily slide over one another. In a gas, the molecules are bouncing around and colliding with one another, and are not in constant contact.
How do molecules behave differently when they are heated up and cooled down? Paste pictures in addition to descriptions
Molecules that are heated up move around faster. Molecules that are cooled down will move around slower.
What are the six molecules that make up most of the Earth? What is an acronym that helps you to remember them?
Carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur (CHNOPS)
What is a monomer? Give an Example.
Monomers are single units that when joined together form a polymer. An example of a monomer is glucose, an amino acid or a nucleotide
What is a polymer? Give an example
Polymers are large molecules made of small, repeating chemical units called monomers. Polyethylene is one example.
What is polyethylene? What does it make up? What is the problem with it? How can we improve that problem?
Polyethylene is the most common plastic. It is also a polymer. The problem with polyethylene is that it does not biodegrade very well and creates greenhouse gases. One way we can improve that problem is to use less plastic and more biodegradable materials.
What is a macromolecule? What are the four macromolecules?
The 4 macromolecules are Proteins. Carbohydrates. Lipids. Nucleic Acids. These are molecules that contain a large number of atoms.
What is a carbohydrate? What is its function?
Carbohydrates are any of a large group of organic compounds containing carbon, hydrogen, and oxygen. They occur in foods and living tissues and including sugars, starch, and cellulose. They contain hydrogen and oxygen in the same ratio as water (2:1) and typically can be broken down to release energy in the animal body. Carbs Provide Your Body With Energy.
What is a protein? What are some of its functions in the body?
They do most of the work in cells and are required for the structure, function, and regulation of the body's tissues and organs. Proteins are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chains.
What is a lipid? What is its function?
Lipids are fatty acids. They are storage compounds, triglycerides serve as reserve energy of the body. Lipids are important component of cell membranes structure in eukaryotic cells. Lipids regulate membrane permeability. They serve as the source for fat-soluble vitamins.
What is a nucleic acid? What are the two types, and what are their functions?
Nucleic acids are a complex organic substance present in living cells, especially DNA or RNA, whose molecules consist of many nucleotides linked in a long chain. The main job is to carry the code for making proteins and sending the code around the cell.
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