Scientific Method & Measurements
List the five steps of the scientific process
Observation
Hypothesis
Experiment
Results
Conclusion
What is an atom?
The smallest unit of an element
What is a mixture?
matter that can vary in composition
What are the three states of matter?
Solid
Liquid
Gas
What is a cell
Basic building block of life
A testable question or statement. (Otherwise called an educated guess)
What is a proton and where is it found?
Positively charged particle inside the nucleus
What is a solution?
Mixture in which one substance dissolves in the other
Which state of matter has a defined volume but not a defined shape
Liquid
What are the three tenets (rules) of cell theory
Cells must come from preexisting cells
Cells are the fundamental unit of life
All organisms are made of cells
What is the definition of mass? What are the units? What is the tool for measurement?
Mass is the amount of matter in an object
Grams, Kilograms
Triple Beam balance/pan balance
What is an electron and where is it found?
Negatively charged particle outside of the nucleus
What is an element? What is a compound?
A substance made of only one kind of atom
A substance made of two different kinds of atoms
Which state of matter has no defined shape or volume
Gas
What are three main differences between a plant and animal cell
Plant cells contain a cell wall, large central vacuole, and chloroplasts
(additional answer: Plants undergo photosynthesis)
What is the definition of weight? What are the units? What is the tool for measuring?
The force of gravity on an object.
Newtons
Scale
What is a neutron and where is it found?
Neutral particle inside the nucleus
What is a homogenous mixture? What is a heterogenous mixture?
Homogenous is when a mixture is evenly mixed
Heterogenous is when the composition of the mixture is not even and can be separated easily
Which state of matter has a defined shape and a defined volume
Solid
What is the nucleus
The brain of the cell, holds the genetic material (DNA)
What is the definition of volume? What are the units? What is the tool for measuring? What is density?
Volume is the amount of space an object takes up
Liters for liquid, cm3 for solid
Graduated cylinder/ LxWxH
Density is the amount of mass in a certain amount of space
What is the magic number for electrons on the outer ring?
8
What is a physical change? What is a chemical change?
A change in the size, shape, form, or state of matter that does no change the matter's identity
Change in matter in which the substances that make up the matter change into other substances with different chemical and physical properties
What are the three signs of a chemical change
Formation of a gas
Formation of a precipitate
Color change due to chemical mixture
What is photosynthesis?
What is cellular respiration?
Photosynthesis is plants taking in water, carbon dioxide, and light energy and transforming it into glucose and oxygen. Takes place in the chloroplasts.
Cellular respiration is on both plants and animals, the cell breaks down glucose and oxygen to form ATP, carbon dioxide, and water. Takes place in the mitochondria