LIFE SCIENCE
A student observes a multicellular organism and identifies tissues working together for a function. What level of organization is this?
What is the Organ level?
A sedimentary rock is buried deep underground and exposed to intense heat and pressure. What type of rock will it most likely become?
Metamorphic rock; heat and pressure change the rock without melting it
If a star is 10 light-years away, what does that tell us about the light we see from it?
We see the star as it was 10 years ago.
A student measures mass in grams and volume in mL to identify an unknown substance. What property are they likely calculating?
density
How many independent variables should you have in an experiment?
Only 1
Explain how the absence of chloroplasts limits the function of animal cells.
If one rock layer is found above another, what can you infer about their ages?
The top layer is younger (law of superposition).
Explain how energy from the Sun reaches Earth.
Energy is transferred as radiation through space
A substance can be broken down into simpler substances by a chemical reaction. Is it an element or compound? Explain.
Compound; elements cannot be broken down further chemically.
Explain the difference between repetition and replication in an experiment.
Repetition = same scientist repeats trials; replication = other scientists repeat the experiment
Explain how the circulatory and respiratory systems work together to maintain homeostasis.
Respiratory system brings in oxygen; circulatory system transports oxygen to cells and removes carbon dioxide.
Describe how the hydrosphere and atmosphere interact during the water cycle
Water evaporates into the atmosphere and returns as precipitation
Explain how mass affects gravitational force between two objects.
Greater mass increases gravitational attraction.
Explain how elements in the same group on the periodic table are similar.
They have similar chemical properties due to the same number of valence electrons
A scientific theory is supported by a large amount of evidence but new data contradicts it. What happens next?
The theory may be revised or replaced based on new evidence.
A population needs to adapt quickly to environmental changes. Which type of reproduction is more beneficial and why?
Sexual reproduction; it increases variation, improving survival chances.
Explain the difference between weather and climate.
Weather = short-term conditions; climate = long-term patterns
How do the positions of Earth, Sun, and Moon create lunar phases or eclipses?
Changing positions affect how sunlight reflects or is blocked.
A substance changes color and produces gas when heated. Is this physical or chemical? Explain.
Chemical change; new substances are formed.
Explain one limitation of using models in science.
Models may not represent all details or may oversimplify reality.
Explain how cellular respiration and photosynthesis are related.
Products of one are reactants of the other.
Compare conduction, convection, and radiation in heat transfer.
Conduction = direct contact; convection = fluid movement; radiation = energy through waves.
Why do stars produce their own light while planets do not?
Stars produce energy through nuclear fusion; planets only reflect light.
A tug-of-war results in movement toward one side. What does this indicate about the forces?
Forces are unbalanced.
A student changes multiple variables in an experiment at once. Explain how this affects the validity of the results.
It makes it difficult to determine which variable caused the results, reducing validity.