Characteristics of Life
List the 6 characteristics of life
Made of cells, reproduction, growth and development,obtain and use energy, respond to the environment, maintain homeostasis
Name the steps in the scientific method?
Make Observations
Identify a question
Research
Form a hypothesis
Test the hypothesis
Analyze and draw a conclusions
What is an Atom?
The basic unit of matter
What are the Four macromolecule families
Carbohydrates, Lipids, Proteins, Nucleic Acids
When bodies of water freeze, they freeze on the top first. This allows aquatic to survive through the colder months.
Density
What is the difference between a unicellular organism and a Multicellular organism?
Unicellular organism is single celled. Multicellular organism has multiple cells
What is a Hypothesis and provide an example?
A hypothesis is a testable explanation about some event in nature
How many protons and neutrons does Oxygen have?
Protons- 8
Neutrons- 8
What is the backbone of all biological molecules?
Water moves upwards, against gravity, through the tiny vessels in plant stems to
conduct water. This happens because water sticks to other substances
Adhesive/ Capillary Reaction
Name and define the two basic kinds of reproduction.
Asexual reproduction is when only one
parent is used to reproduce. Sexual reproduction is when two parents create offspring during
the process of a sperm cell fertilizing an egg cell
What is Qualitative Observations and give an example?
Observations use your senses to observe the results. (Sight, smell, touch, taste and hear. Describable, not measurable.
What is the difference between a molecule and compound?
Molecule-A group of atoms (two or more) bonded together
Compound-Atoms of 2 or more elements held together by bonds
What is Dehydration Reaction?
Removes a water molecule, forming a new bond
Water molecules stick to each other. This is because of hydrogen bonding. This happens on the top of water even more, allowing insects and small animals to walk
across the water, giving them a better chance of avoiding predators
Cohesion
What is homeostasis?
Homeostasis is when a cell responds to internal changes in order to keep everything balanced and how it should be.
What is the difference between a law and Theory?
Theory: an explanation of a natural phenomenon supported by many related observations or events based on proven hypotheses verified many times by different researchers.
Law: must be simple, true, universal and absolute
What atoms, and how many, make up each of the following compound C2H6O ?
C- 6
H- 6
O-1
What is the primary function of Carbohydrates?
To provide and store Energy (fast source of energy)
What type of bond is a WEAK chemical bond between the hydrogen atom in one molecule and a negatively-charged region of another molecule?
Hydrogen Bonds
What is the difference between an autotroph and a heterotroph?
An autotroph uses energy from the sun to make food through the process of photosynthesis. A
heterotroph eats other organisms.
What is the difference between independent variables and dependent variables?
IV: This is the variable that is changed by the investigator. The thing "I" change- it starts with "I".
DV:This is the variable that is measured, counted or recorded by the investigator. It is the factor that varies in response to conditions manipulated with respect to the independent variable.
What is the Charge and Location of Protons, Neutrons, Electrons?
Protons: +1 in Nucleus
Neutrons: No Charge in Nucleus
Electrons: -1 in outer shell
What is the primary function of Lipids and what don't they like?
To insulate, store energy, and make up cell membranes. They do not dissolve in water!
The oxygen end of a water molecule is ____ and the hydrogen end of a water molecule is ___
The oxygen end of a water molecule is negative and the hydrogen end of a water molecule is positive