Think like a scientist
Scientific questions and hypotheses must be ______
Testable
Outer Planet
Given the chemical reaction:
6CO2+6H2O --> C6H12O6 +6O2
If there are 16 grams of carbon in the reactants, how many grams of carbon can be found in glucose in the reactant? Why
16 grams due to the law of conservation of mass
When acidic precipitation falls to Earth's surface, it has damaging effects. List the effect this can have on both living and nonliving things
Nonliving: the corrosive acid can affect buildings and
List two properties of metals
Shiny, malleable, good conductors, etc.
A researcher claims to have developed a new medication for treating asthma. Why is it important for the researcher to communicate the results from the research to other scientists?
So that other scientists can repeat and validate these results.
There is a gravitational relationship between the Earth, sun, and Earth's moon. Rank these objects from weakest to strongest gravitational pull.
moon < Earth < sun
The reason that animals must consume carbohydrates and breathe in oxygen is so that what process can occur?
Cellular respiration
List two ways to reduce air pollution.
Reduce fossil fuel use and switch to renewable enrgy sources. reduce deforestation that adds to CO2 in the atmosphere
What process occurs in the core of the sun?
Nuclear fusion.
Identify the independent and dependent variable for the following scientific question:
How does salt affect water's freezing point?
IV: amount of salt in the water
DV: freezing temperature
When the Earth falls directly between the sun and moon what celestial event occurs?
Full moon
Cells can reproduce through either mitosis or meiosis depending on the cell type. List two differences between these forms of reproduction.
Mitosis: produces 2 cells, asexual, all cells are the same etc.
Meiosis: produces 4 cells, sexual, all cells are unique
What is the difference between erosion and desertification?
Erosion is caused by natural forces that lead to soil loss while desertification is when a once fertile area loses moisture and nutrients hence becoming a desert.
Europium is an element with the atomic number 63, would this element be more or less massive than Carbon with an atomic number of 6. Why?
63 protons will weigh more than 6 protons
List all steps of the scientific method in order
observation > question> research> hypothesis > experiment > analyze data > form conculsion > share your results
It's the northern summer solstice. Explain what would happen to the length of the day if you took a trip from New York to Argentina.
The length of the day would shorten dramatically because it will be the winter solstice in Argentina.
Alcoholic fermentation is how yeast and bacteria produce energy in the absence of oxygen. What kind of fermentation is carried out by animals? Where in the body does this occur?
Lactic Acid Fermentation. Muscle cells
What are the main sources of freshwater pollution?
farming that is unsustainable, pollution from the atmosphere leading to acid rain and household wastes entering the water cycle
Having dimples is a dominant trait over not having dimples. If a woman who does not have dimples has children with a man who is heterozygous for the dimples trait. What percent of their offspring will have dimples?
50%
The control group allows the experimenters to compare the effects of the medicine / vaccine with those that did not receive anything in order to make comparisons.
How does a comet differ from an asteroid?
Asteroids are made of rock and comets are made of ice and dust and appear to have a "tail"
Compare the differences between autotrophs and heterotrophs.
Autotrophs: plants, make energy on their own via photosynthesis they are also called producers
Heterotrophs: animals, consumers that consume other organisms for energy.
List 3 effects that deforestation has on the pollution issues of planet earth
-increased CO2
-Less O2
-Habitat loss
-Biodiversity loss
How is the message encoded in DNA turned into a protein used by living things? List the central dogma of biology in order:
DNA --> DNA is DNA replication
DNA--> RNA is transcription
RNA--> Protein is translation