Show:
Basic Science
Cells and the Metric System
Atoms
Water and Compunds
Energy
100
Who reviews articles for peer-reviewed journals?
What is anonymous and independent experts
100
Cells in multicellular organisms have many different sizes and shapes. These differences in cells is called cell specialization. Cell specialization allows cells to
What is perform different functions
100
The three particles that make up atoms are
What is protons, neutrons, and electrons.
100
Water molecules are polar, with the what makes water polar?
What is oxygen side being slightly negative and the hydrogen side being slightly positive.
100
The energy needed to get a reaction started is the
What is activation energy
200
How dose science influences society? list three things
What is Science provides answers to some of society’s practical problems. Science advances technology that is useful to society. Science increases society’s understanding of how people affect the environment.
200
How many meters are in 2.4 km
What is 2,400
200
A chlorine atom that has 17 protons and 18 neutrons is called
What is chlorine-35.
200
When salt is dissolved in water, water is the
What is solvent
200
Which of the following statements is true about catalysts?
What is Catalysts lower the activation energy of a chemical reaction.
300
What are the smallest objects that biologists study?
What is molecules
300
Name two essential roles that enzymes play in cells.
What is Answer should include two of the following: regulating chemical pathways, making materials that cells need, releasing energy, and transferring information.
300
A covalent bond is formed as the result of
What is sharing electrons.
300
What is a compund
What is The physical and chemical properties of a compound are usually very different from those of the elements from which it is formed.
300
Proteins that speed up the rate of reactions in living things are
What is enzymes
400
What are four scientific attitudes that help scientists generate new ideas?
What is curiosity, skepticism, open-mindedness, and creativity
400
Which statement is true about macromolecules? a. Simple sugars are made of polysaccharides. b. Glycerol is made of fatty acids. c. Proteins are made of amino acids. d. Nucleotides are made of nucleic acids.
What is Proteins are made of amino acids.
400
Why is carbon so special compared to other elements?
What is Carbon atoms can bond to one another and form a lot of different structures.
400
Scientists show the composition of compounds by a kind of shorthand known as a chemical formula
What is chemical formula
400
Describe a catalysts
What is Catalysts lower the activation energy of a chemical reaction.
500
Why is a universal system of measurement necessary in science? What are some units of the common system used now, and what do they measure?
What is A universal system of measurement allows scientists around the world to communicate their findings. Metric units such as meters, liters, grams, and Celsius allow scientists to measure length, volume, mass, and temperature, respectively.
500
Why is it NOT useful to view science as a set of facts?
What is Science is always changing and advancing so the facts may change over time.
500
What relationship exists between the mass number of an element and the isotopes of that element?
Isotopes of an element have the same number of protons but different numbers of neutrons. Because the mass number is the sum of the atomic number (number of protons) and the number of neutrons, isotopes of the same element have different mass numbers.
500
When working in the laboratory, you discover that the solutions you are working with are tomato juice with a pH of 4 and soap with a pH of 10. By comparing the pH of these substances with that of pure water, would you find that each of these substances is acidic or basic? Explain.
What is The pH of pure water is 7, or neutral. Tomato juice, with a pH of 4, contains higher concentrations of H+ ions than pure water and is an acidic solution. Soap, with a pH of 10, contains lower concentrations of H+ ions than pure water and is a basic solution.
500
How is energy related to the reactants and products of a chemical reaction?
What is During a chemical reaction, chemical bonds in the reactants are broken and chemical bonds are formed to make the products. Energy is released or absorbed whenever bonds are broken or formed.