Cells, Systems & Genetics
Which part of the cell controls its activities?
Nucleus
What process breaks rock into smaller pieces without moving it?
Weathering
What force pulls objects toward Earth?
Gravity!
Tell me an organisms that is a producer
Any type of plant
What causes day and night?
Earth tilt
What is one function of the cell membrane?
Keeping things in and out of the cell!
Give one example of erosion.
Water carrying sediment, wind moving sand
Students are playing tug of war, rope is pulled to the left with a force of 50N and other students pull it to the right with a force of 75N, what is the net force?
25N to the right
What is one abiotic factor in an ecosystem?
Temperature, humidity, etc. Anything that has NEVER been living
Why do we see different phases of the Moon?
tilt needed for seasons
How do the respiratory and circulatory systems work together?
Respiratory works in exchange of gases and circulatory transports!
How do convection currents inside Earth cause plate movement?
heat → mantle movement → plates shift
Compare potential energy and kinetic energy using a skateboard as an example
Staker at top of ramp is full of potential vs skate going down ramp is full of kinetic energy
What happens to consumers if producers decrease?
less energy → fewer consumers
A star is located on the upper left side of a Hertzsprung–Russell (HR) diagram. What can you conclude about this star?
A student notices a trait appears in a parent but not in the child. Explain how this is possible using dominant/recessive traits.
Must be a recessive trait hidden unless both alleles recessive
A region experiences frequent earthquakes but no volcanoes.
What type of plate boundary is most likely present? Explain.
Transform boundary, earthquakes but no volcanoes
Two objects have the same volume, but one sinks and one floats.
Explain this using density and particle arrangement.
density differences (mass/volume, particles closer)
A new predator is introduced into an ecosystem.
Predict TWO effects this will have on the food web.
prey decrease, competition changes
A student creates a model of Earth orbiting the Sun but forgets to tilt Earth.
What important concept is missing and why does it matter?
tilt needed for seasons
A plant is placed in sunlight but does not grow well. The soil is dry and nutrients are low. Which factor is MOST limiting growth and why?
Lack of water/nutrients = limiting factor
A forest is cleared after a forest fire. Explain what will happen next STEP BY STEP
After forest fire, secondary succession will begin, since soil is present, it'll grow grasses first, then shrubs and ferns and eventually trees. Takes less time than primary succession
A train travels at a constant speed of 60 km/h. It travels for 2 hours, then stops for 30 minutes, and then continues traveling for another 1.5 hours at a speed of 75km/h. What is the total distance traveled by the train?
Step 1: First part
Distance = 60 × 2 = 120 km
Step 2: Stop time
Does NOT count toward distance
Step 3: Second part
Distance = 75 × 1.5 = 112.5 km
Step 4: Total distance
120 + 112.5 = 232.5 km
A golf club is dyeing their grass for a tournament coming up, the club is ocean front and the ocean becomes polluted afterward, killing many fish and plants. Explain how this impacts the ecosystem SHORT term and LONG term.
short-term death, long-term imbalance in the food web
algal bloom because of fertilizer in dye
Two stars are shown on an HR diagram:
Compare both stars!
Star A (upper right):
Star B (lower left):