Life Systems
This level of organization groups similar cells that work together to perform a job.
tissue
A plant that makes its own food using sunlight is called a _____.
producer
The process in which water vapor cools and forms liquid water (clouds) is called _____.
condensation
When two or more substances are mixed but do not form a new substance, this is usually called a _____.
mixture
DAILY DOUBLE!!
The force that pulls objects toward Earth is called _____.
mavity
Name two major human body systems that help deliver oxygen and remove carbon dioxide.
respiratory and circulatory (or respiratory and circulatory systems).
Name the three roles organisms can play in an ecosystem (think producers, consumers, and ____).
decomposers
Give two pieces of data you would collect to describe today's weather at your school.
temperature and precipitation (or wind speed/direction).
True or False: Heating a material always changes it into a new substance. Explain your answer in one sentence.
False - heating sometimes causes physical changes (melting) not chemical; sometimes causes chemical changes.
If you push two identical toy cars with different forces, the one with more force will have more ______. (Answer: direction, position, or speed — choose the best word.)
speed
Use a model to explain how organs form an organ system. Give one example of an organ and the system it belongs to.
example — heart (organ) → circulatory system; model — layered paper cutouts.
Describe one way a decrease in a population of insects could affect an ecosystem that includes birds and flowering plants
fewer insects → less food for birds → bird population drops; fewer pollinators → fewer flowering plants reproduce
Explain how the ocean influences weather or climate for coastal North Carolina in one or two sentences.
ocean moderates coastal temperatures, supplies moisture for storms.
You mix baking soda and vinegar and see bubbling. What is one way to tell if a new substance formed?
look for evidence like temperature change, new gas, color change, precipitate.
Describe how friction affects the motion of an object sliding across carpet vs. smooth floor.
carpet has more friction so object slows quicker than on smooth floor.
This body system helps the body move and also supports and protects internal organs. Name the system and one of its main parts.
muscular and skeletal (answer: skeletal system; main part: bones) or muscular (muscles).
Compare an estuary and an ocean in one sentence about how each supports life.
estuary = mix of fresh & salt water, nursery for many species; ocean = large saltwater habitat with different salinity and depth.
Describe how the sun’s energy drives one part of the water cycle using the words evaporation or transpiration.
sun warms water → evaporation increases water vapor.
Describe a classroom investigation to compare the weight of an object before and after it interacts with water (include one variable to control).
weigh dry object, submerge, weigh again; control: same balance, same container
Explain how changing an object’s mass would affect its motion when the same force is applied.
greater mass → acceleration decreases for same force (Newton’s second law).
Describe how cells, tissues, organs, and systems are organized from smallest to largest, and give a classroom-friendly model for each level.
cells → tissues → organs → systems; models: beads → knitted fabric → plastic model organ → model human.
Use evidence-based reasoning to argue which ecosystem among forests, grasslands, and salt marshes might support the greatest variety of species and why.
look for reasoning about habitat diversity, resource availability, niche variety.
Look at a week of temperature and precipitation data (teacher provides). Identify one daily pattern and one seasonal pattern from the data and explain what they tell you.
expect answers describing repeating daily cycles (temperature up in afternoon) and seasonal patterns (warmer in summer).
Explain how heating and cooling can change a material’s properties and give one real-world application for that change.
heating can melt, soften or expand materials (application: melting metal for recycling, cooking, shaping plastics).
Design a simple investigation (materials and steps) to compare how gravity and friction affect the motion of rolling objects; include one prediction you could test.
sample: ramp, different surface textures, marbles; measure distance/time; prediction: smoother surfaces yield greater distance and speed