Nature of Science
What is the difference between a scientific law and a scientific theory?
Laws describe what; theories explain why.
What are the two factors for gravity in space?
Mass and Distance
Calculate the density of the unknown solid object (NO UNITS = WRONG) with a mass of 54g and a volume of 5.4cm3
Density = m/v
Density = 54g / 5.4cm3 = 10g/cm3
Fill in the blank:
Photosynthesis __________ glucose so that Cellular Respiration can _____________ glucose.
Photosynthesis MAKES glucose so that Cellular Respiration can BREAK DOWN glucose.
What is the Law of Conservation of Mass?
Must be word-for-word in order to get it correct!
(Mass/Matter) cannot be created or destroyed, only rearranged!
Identify the Independent Variable (IV) and the Dependent Variable (DV) in the scenario:
A sports medicine researcher has been hired by Gatorade to test the effects of its sports drink on athletic performance. The company wants to claim that when an athlete drinks Gatorade, their performance will improve.
IV: Type of drink (Gatorade vs. other sports drink)
DV: athletic performance
The universe contains ___________ of galaxies and each galaxy can contain ___________ of stars.
Fill in the blanks.
Billions; billions
What happens in a chemical reaction?
1. Bonds break
2. Bonds rearrange
3. Bonds form new substance(s)
What are the three components to Cell Theory?
1. All cells come from pre-existing cells.
2. Cells are the basic unit of structure and function.
3. All living organisms are made up of one or more cells.
What do elements in the same group on the Periodic Table have in common? (half)
Specifically, what do they have in common? (half)
Similar properties/traits/characteristics
Specifically, reactivity levels
Identify the Independent Variable (IV) and the Dependent Variable (DV) in the scenario:
A well-known fast-food corporation wants to know if the color of the interior of their restaurants will affect how fast people eat. Of course, they would prefer that consumers enter and exit quickly to increase sales volume and profit.
IV: color of interior
DV: speed of customers eating
The Moon moves two ways (___________ & ___________).
The Earth moves two ways (___________ & ___________).
The Sun moves one way (___________).
Fill in the blanks correctly.
The Moon moves two ways (Rotates and Revolves).
The Earth moves two ways (Rotates and Revolves).
The Sun moves one way (Rotates).
Jordan adds some soil and plants to a large glass jar to build a terrarium. He waters the plants and then adds two snails, two crickets, and an earthworm to the jar. Jordan then places the lid tightly on the jar and sets it on a sunny windowsill. Based on the law of conservation of mass, what happens to the mass inside the terrarium?
Mass will never increase or decrease; never be created or destroyed; it STAYS THE SAME!
All plants and animals have threadlike structures in the nucleus of each cell. These structures contain a set of instructions in the form of DNA. Which of the following terms identifies these threadlike structures?
Chromosomes
What is the role of decomposers in an ecosystem?
Decomposers break down dead organisms and return that matter back into the soil or atmosphere.
Testable Question: When classical music is played to a group of toddlers, how relaxed does their heart rate become?
What is the IV and DV in this testable question?
IV - classical music being played or not
DV - heart rate (faster/slower)
What are the three types of plate boundaries; give ONE example of a natural event that occurs at EACH plate boundary.
Convergent: mountains, subduction zone, or volcanoes
Divergent: seafloor spreading, mid-ocean ridges, rift valleys
Transform: earthquakes, tsunamis, or faults
What happens to a gaseous substance when you decrease the temperature?
The molecules will slow down and get closer together.
What organelles do animals only have?
What organelles do plants only have?
Animals - lysosomes and centrioles
Plants - cell wall and chloroplasts
What are the four branches of science called?
Nature of Science, Earth/Space Science, Physical Science, & Life Science
Testable Question: How does the surface of a road affect the stopping ability of a Ferrari going 70 mph?
What is the IV and DV in this testable question?
IV - surface of the road (smooth/rough)
DV - stopping ability of the Ferrari (faster/slower)
What is the process of nuclear fusion AND why is it important for stars?
Nuclear fusion is when one atom fuses into another. It is important for stars as it gives them radiant (light) and thermal (heat) energy.
Gallium (Ga) is an element on the periodic table. Calculate PEN for Gallium.
P: 31
E: 31
N: 39
(This is on the White Board) Punnett Square - list ALL genotypes and ALL phenotypes with percentages.
T - Dominant; Tall t - recessive; short
Genotypes: 25% TT, 50% Tt, 25% tt
Phenotypes: 75% Tall, 25% short
Which of the following is NOT an effect of gravity on Earth?
A. Tides
B. Seeing the position and phase of the Moon each day
C. Earth's atmosphere keeps us alive
D. The change of seasons
D. The change of seasons