20230201 What dissolves faster, the tablespoon of sugar or the sugar cube...why?
20230201 What dissolves faster, the tablespoon of sugar or the sugar cube...why?
Earth has not always had an atmosphere rich in oxygen. How did we get our oxygen?
Which atmosphere did we see the first signs of life? What evidence do we have that proves the existence of life at that time?
20230125: It is a cold day. Draw a blue arrow to show the movement of cold air.
20230125: It is a warm day. Draw a red arrow to show the movement of warm air.
20230125: night time is causing a mountain breeze to form. Use a blue arrow to show the direction of wind movement.
20230125: Day time is forming a valley breeze. Use a red arrow to show the direction of wind movement.
20230130 Imagine you are drinking a cup of coffee and you add some sugar to your coffee. The coffee represents a solute.
20230131 What factors affect solubility?
20230201 What dissolves faster, the tablespoon of sugar or the sugar cube...why?
20230202 - You are boiling two pots with the same amount of water, and you add salt to one pot. Which pot will boil first, and why?
20230206 - Provide a few examples of acids and bases that we use in our daily lives.
Identify each compound as soluble or insoluble.
NaBr is
Ag2CO3 is
PbSO4 is
What is the net ionic equation for the following reaction?
2AgNO3(aq) + CaCl2(aq) -> 2AgCl(s) and Ca(NO3)2(aq)
+ ->
2Cl-
2Ag+
Ca(NO3)2
2NO3-
Ca2+
Using the Acid-Base Strength Chart, identify if the following compounds are strong or weak.
HNO3 =
SO4- =
OH- =
HCO3 =
20230210 - The most common method for describing the strength of an acid or base is known as the pH scale.
A substance with a pH of 7, like water, is
A substance with a pH of 13 is
A substance with a pH of 2 is
In a neutralization reaction, an reacts with a and produce a and . This will result in a neutral solution.
In your own words, explain what equilibrium is.
For the following reaction, complete the equilibrium constant, or Keq.
Reactant/Product
If a reactant is added to a system, equilibrium shifts towards the .
Temperature
Increasing the temperature energy to the system, shifting equilibrium of this reaction in the direction.
Pressure & Volume
If a reaction at equilibrium experiences an increase in pressure or a decrease in volume, it shifts in the direction with .
20230224 - What are the five factors that influence reaction rate? And give an example of one and how we modeled that change in class.
20230228 - How does the ocean water participate in the water cycle?
20230301 - How does the temperature of ocean water change in relation to water depth, and why?
Phytoplankton (algae and photosynthetic bacteria) play an important role in the carbon cycle, as they conduct most of the photosynthesis that occurs on our planet.
A) Write the chemical formula for photosynthesis.
B) Tell me where phytoplankton will get carbon dioxide. (CO2)
An observer is watching ocean waves from a lighthouse. He measures them carefully and finds that the distance between wave crests is 18 meters. A new wave crest passes his lighthouse every 3 seconds. What is the wave speed?
Label where in the picture we will see maximum potential energy (PEmax) and maximum kinetic energy (KEmax)
Gravitational Potential Energy is energy stored due to position in a gravitational field, commonly due to Earth's gravity.
What is the equation for calculating gravitational potential energy?
20230315 - Elastic potential energy is energy stored in an object due to stress or compression, like drawing a bow or compressing a string. The following equation can be used to find the potential energy of a spring.
Suppose a jack-in-the-box has a spring constant of 80 N/m. How much elastic potential energy is stored in the jack-in-the-box if its spring is compressed 10 cm?
20230316 - Electric Potential Energy is the total potential energy of a charged particle. \
Where PEelec is the electric potential energy, q1 and q2 are the charges, r is the distance between the charges, and k is the coulomb constant 8.99 x 109 N•m2/C2.
Set up the equation to find the electric potential energy for two particles with a charge of 35 μC and -20 μC that are 0.023 m apart.
What is the kinetic energy of a ball that is 670 g and moving at a speed of 24 m/s.
Electric and magnetic forces are everywhere. How do they create the spectacular light shows known as the northern lights?
If the system is the cup of coffee, the environment is a room, the change in entropy in the system will be ...
The change in entropy for this sytem (ice water) on a warm day will be...
Positive
Negative
No change
What is the photoelectric effect?
In explaining the photoelectric effect, Einstein said what about light?
What do we see happen when we run a magnet through a copper wire coil. How does the length of this coil impact the magnitude of this phenomenon?
What is the difference between a conductor and an insulator. Give examples of substances of both a conductor and insulator.
20230328: What does it mean to say that an element is radioactive?
20230330: What is the difference between nuclear fusion and nuclear fission?
In Mendel's Pea Plants, one of the traits they observed were pea shape. Represented with the letter R and r, Mendel discovered that peas can either be round or wrinkled in shape. With the image above, identify the genotype and phenotype for the following allele combinations.
Allele Combination | Genotype | Phenotype
Homozygous Dominant
Heterozygous
Homozygous Recessive
Aside from homozygous dominant/recessive genotypes/phenotypes, what other factors (we talked about them yesterday) can affect phenotype?
What do you already know about DNA?
20230504 - What are cells and why are they important for life?
20230508 - Match the organelle with one of its functions
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Ribosomes | arrow_right_alt | Contains genetic material |
Golgi Apparatus | arrow_right_alt | Convert chemical energy obtained from food into energy-rich compounds |
Lysosome | arrow_right_alt | Produces sugars and starches via photosynthesis |
Mitochondria | arrow_right_alt | Responsible for movement of materials into and out of the cell |
Endoplasmic Reticulum | arrow_right_alt | Reads RNA to combine amino acids to produce proteins |
Nucleus | arrow_right_alt | Contains digestive enzymes to break down excess cell parts |
Plasma Membrane | arrow_right_alt | Breaks down toxins in cell |
Chloroplast | arrow_right_alt | Post-translation modification site of proteins, lipids and hormones |
Peroxisome | arrow_right_alt | Site of packaging, folding and delivery of proteins, lipid synthesis and Ca+ ion storage. |
20200509 - Write the name of each structure shown in the image.
A:
B:
C:
D:
E:
G:
20230510 - Most adult cells are not . This is because progression through the cell cycle is to prevent uncontrolled growth. Exposure to can damage cells by altering, or mutating, their DNA. Mutations can then lead to the transformation of normal cells to . Many cancer cells do not require external factors like particular nutrients and temperature controls in order to divide. They avoid programmed cell death ( ), begin to grow quickly, and form .
20230511 - Match the type of asexual reproduction with the correct image.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Parthenogenesis | arrow_right_alt | |
Spore | arrow_right_alt | |
Budding | arrow_right_alt | |
Propagation | arrow_right_alt | |
Binary Fission | arrow_right_alt | |
Fragmentation | arrow_right_alt |
20230512 - Categorize the following statements into either Mitosis or Meiosis.
Divides cells twice
Cells are haploid
No crossing over occurs
Daughter cells genetically identical to parent cell
Develops gametes
Crossing over occurs
Cells are diploid
Divides cells once
Develops somatic cells
Daughter cells genetically different from parent cell
Mitosis
Meiosis
20230515 - Fertilization is the fusion of an
