Scientific Method
A single living thing makes offspring exactly the same as itself is?
Asexual
The negatively charged particles in atoms are?
electrons
What are the properties of water
expands when freezes
holds onto heat for a long time
dissolves other substances
What are the smallest units that are considered to be alive?
cells
A protein that speeds up the rate of a chemical reaction inside a cell is called?
enzyme
A proposed scientific explanation for a set of observations is called?
hypothesis
An ionic bond is formed as the result of?
transferring electrons
What is the difference between adhesion and cohesion? Give an example for both
Cohesion is an attraction between molecules of the same substance like water molecules drawing together. Adhesion is an attraction between molecules of different substances like capillary action.
What source do plants gain their energy from, and from what source do animals gain their energy from?
Plants get energy by trapping and storing energy from sunlight and animals get energy by consuming plants or other animals.
What is a chemical reaction?
is the process that changes or transforms one set of chemicals into another
An idea that has been thoroughly tested over time and is considered fact is known as a scientific
law
The nucleus of an atom contains
protons and neutrons
What is the difference between an acidic solution and a basic solution.
Acidic solutions contain higher concentrations of H+ ions in a solution than pure water and have a pH value below 7. Basic solutions contain lower concentrations of H+ ions than pure water and have pH value above 7
inference
Starches and sugar are examples of what group of organic compounds (macromolecules)
carbohydrates
Why isn't the scientific method linear?
If your hypothesis is proved incorrect you will need to start the process over with a new hypothesis, new experiment, analyze, and conclude.
Why do all the isotopes of an element have the same chemical properties?
because they all have the same number of protons and electrons
What does the polarity of water have to do with water molecules bonding?
Water is polar due to an uneven distribution of electrons creating a negative charge in the oxygen atom and a slightly positive charge in each hydrogen atom that allows an attraction of one water molecule hydrogen atom to bond to the oxygen of another water molecule.
What is a characteristic of nucleic acids in living things
stores and transmits genetic information
Living organisms are made up of molecules that consist of what bonded to other elements?
Carbon
What is a well-tested explanation that accounts for lots of observations and hypotheses
Scientific Theory
What relationship exists between the mass number of an element and the isotopes of an 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.
The force that results form unequal sharing of electrons ( and is responsible for Gecko's ability to climb smooth surfaces) is?
Van der Waals forces
Name five of the eight characteristics of living things.
Living things are based on a universal genetic code
Living things grow and develop
Living things respond to their environment
Living things reproduce
Living things maintain a stable internal environment
Living things obtain and use material and energy
Living things are made up of cells
Taken as a group, things evolve.
Explain what happens at the molecular level when you eat a cracker and it turns from salty to sweet after a while.
Your salvia will break down the carbohydrates using enzymes to turn the salty favor to sweet by releasing sugar (glucose-energy) during the break down of the cracker.