Red
What are the components of cell theory?.
A-All living organisms are composed of one or more cells.
B- Cell is the basic structural and functional unit of living organisms.
C- All cells come from pre-existing cells.
A basic principle for scientific research is that the experiment must be able to be replicated. What happens when an experiment is replicated?
Other scientists perform the same experiment and get comparable results.
What is a compound?
Two different elements chemically combine.
In convection, hot gases rise through cooler gases as they travel to the top of the Sun’s convection zone. Once they reach the top of the convective zone, they cool. What happens to these gases next?
They sink back down.
Where can you find elements with similar properties in periodic table?
In the same column
Which two systems in the human body work together to eliminate carbon dioxide (CO 2) from the body.
Respiratory and Circulatory
Individual scientists do not submit their work to the scientific community before making sure they are right.
How best can they ensure that their results are valid?
By conducting multiple trials
What are the levels of organization of life?
cell-tissue-organ-organ system-organism
Compare and contrast photosynthesis and cellular respiration
sun light+H2O+CO2 = Sugar +O2
Chloroplasts of Plant cells
Sugar+O2 = H2O+CO2+ATP
Mitochondria of Plant and Animal cells
Compare and contrast dependent and independent variable
Independent- cause, something different in the experiment (manipulable)
Dependent- effect, result you are evaluating in the experiment
Chemists once believed that an atom was made of negative electrons dispersed inside a positive mass like raisins in pudding. After finding new evidence, they adopted a new model of the atom. What is the way Scientists used to modify the model?
1-New evidence
2-revise the model
3- Fit the data better or modify the model
Organize the objects according to the size.
Galaxy-Earth-Sun-Universe-Solar system-Moon
Moon- Earth-Sun-Solar System-Galaxy-Universe
What is the difference between microwaves and ultraviolet radiation?
Ultraviolet- shorter wavelength and high frequency and energy
Differentiate chemical energy and mechanical energy and describe an example of energy transformation from chemical to mechanical.
Chemical energy- energy store in the bonds of matter (potential energy)
Mechanical energy-combination of potential and kinetic energy- an object in motion.
Example: cyclists ride a bicycle.
A PE teacher is investigating how football and basketball influence in the heart rate of students of elementary and middle schools.
Identify dependent and independent variable
Investigation is wrong because teacher is using two independent variables.
Earthquakes and volcanic eruptions are common on Ring of Fire at western edge of the Pacific Ocean
Which theory does this pattern of geological phenomena support?
Plate tectonics
What is the Decomposers function?
Return energy to the soil in order to be use by producer
Compare mass of the solute and solvent than the mass of solution.
Sugar + water = sugar solution
Mass of solution is equal to the mass of sugar + mass of water.
What is a characteristic shared by both predators and parasites?
They both use another living thing as a food source.
What would happen within a few months if all decomposers on Earth disappeared overnight?
an overabundance of organic waste.
Describe different Boundary plates.
Convergent-Collision- Mountain Volcanoes
Divergent- Dividing- Mid ocean ridge
Transform- Sliding San Andres Fault
What characteristics (3) do livings organisms have in common?
At least one cell
DNA
They need Energy
Compare reactants and Product.
CH4 + O2 = CO2 + H2O
product has different chemical composition than reactants.
Mass of reactants = mass of product
Compare producer and Consumer
Producer: Autotrophic, photosynthesis. Plants that produce their own food.
Consumer: heterotrophic. Eat food from environment.
What is representing the column's name?
Explain
Stars colors HR Diagram
From red to blue:
Size increasing
Temperature increasing
Luminosity increasing